It has about 100K miles on it, a new tranny, new shocks, struts, rotors, breaks, map sensor and drives fine. That doesn't sound right. Anyone that can give direct links to pages discussing this problem with this car I would be greatful. I looked over the forum to see what posts have been given about this issue and concluded that I needed to verify if the heater hoses are both hot after the engine has warmed up to normal running temperature and then also check for any stored codes. dealer telling me sounds like gaskets again. Just search for "purge line" if you need help. Jun 7, 2014 · I just bought this gorgeous White one owner 70,000 mile 1999 Cadillac Deville. Jan 8, 2013 · Well, last week i realized the heat was getting less and less , I thought it was the controller and or the vents situation , I them checked the coolant res and found out that it was empty. FWD DeVille 1985-2005, Fleetwood, and 60 Special Apr 5, 2012 · The flashing light cam and went and the misfire did - not I need to tear the whole thing apart - well check everything because I taxed the cooling system which is why most of those codes got thrown up, I tried pulling the heat off the engien by running the heater - but it didnt blow hot - (Because no coolant was getting past anything or Apr 22, 2014 · My mother has a 2005 Deville that has also run perfectly with no issues. Do you get correct heat from the HVAC system? Little or no heat points to a clogged heater core. The 1/2" OD rubber hose connected to near the top (1. 2001 deville has no heat when idling also overheated engine light comes on - Cadillac 2001 Seville question. Check the purge line. It's throwing a few codes (p0137-H02s-12 banks sensor 2, p0301-cylinder 1 misfire , p0507- idle speed control /idle too high, p1258- Jun 4, 2011 · It held with no pressure drop for 15 minutes (tester says 2 minutes indicates no problems). Jul 5, 2012 · The car will be running just fine and at normal temprature and then start to heat up kicking the ac off and giving the warning message of engine hot / idle engine. Apr 20, 2015 · Ive got a 2001 DHS. Mar 25, 2004 · I have a 94 Sedan Deville w/170000+ miles on it. and if its bad, the car will overheat when driving and cool down at idle. Dec 9, 2019 · If your Cadillac DTS is running hot, it is a serious problem. Nov 5, 2020 · The purge line and heater circuit are vital for correct Northstar cooling. I never had a problem until now because I never really ran the AC. Never had a second of trouble. Aug 11, 2014 · Got a 2000 cadillac deville 140k miles. Nov 16, 2012 · It is supposed to have Dex in it, but both of the above are bad signs. May 21, 2019 · One of the most common (and) critical major engine problems is a blown head gasket. After that the temperture gauge shot up and it said engine was hot idle engine. Oct 9, 2008 · That sure sounds like a headgasket failure even if the engine recovers at an idle. No mention of boiling over with the cap off, no mention of no heat with the heater on, no mention of overheating at highway speeds or near 70, nor any mention of coolant usage. I let set until it was cold. The suspension is amazing on every turn and bump. Sep 10, 2004 · My friend has a 2001 Deville that has an overheating problem. I've replaced the thermostat, radiator, and water pump. So I call the Cadillac dealer and ask them what the codes mean and if I could make it to my mechanic. Oct 9, 2005 · Some try to crank their heat in order to help cool an engine during an overheating. Just replaced ground wire. No bubbles in coolant res. Temperature control #3 rear circuit range performance U1064 h. YOu know kids, They don't listen. 2001 deville low coolant light is on, overheating. Oct 2, 2013 · I have an 01 DeVille base that is overheating. I have a 2004 Deville that I picked up for next to nothing last fall that is acting the same as that 2005. The car remains cool when it idles. So this is what going on when I first start my deville up I can feel flow going thru the thermostat but the hose is cold and top hose feel like pressure is builded up in it. I took it to a shop for a heater core flush which they performed but to no avail. Fast Forward a couple of weeks and the heat doesn't work again. Low system voltage - at idle - might cause a blend door movement. Lf wheel speed circuit open or shorted P1536 h. There's no mixing in the oil so theres no headgasket problems. You will find the gravity of paying close attention to coolant supplements on this forum. I have no loss of coolant in the car. Hmm that's a bit weird. c. Recognizing the signs of a blown head gasket in your The most common reasons a Cadillac DeVille is overheating are a coolant leak (water pump, radiator, hose etc. Ignoring an overheating engine can lead Jul 17, 2018 · I'm following a thread on here about a 2005 with over heat issues and thought I would start my own. May 17, 2014 · Re: 1999 Cadillac Deville apparently overheating. ), the radiator fan, or a failed thermostat. You add/check coolant through the surge tank fill neck, cap off Cadillac Vehicle Discussion. 97 cadillac deville concors 4. I fail to see any condemnation of the HG at this point. The proper thermostat is designed to begin at 188 and be fully open at 206 - the range covered by the highly damped 12:00 gauge needle position. Jul 27, 2013 · Re: 1998 cadillac deville overheating problems? Are these temps higher than you normally see? DO NOT use the bars tabs. they said they didnt see any cracks in the block so i should be ok and i havent been leaking Aug 20, 2023 · Hi all. Here are the details. The heater still could have been the cause of a problem if it let some trash out of the heater core and into the system. At times the car tends to overheat if I'm doing mostly city driving (stop & go driving). When it begins to overheat at the top of the hill that I mentioned earlier, it gets to about the 1 o'clock position and then I begin to speed up on the downside of the hill which, after a minute or so, causes the temp to decrease. Engine coolant overtemperature- air conditioning disabled B0429 c. Nov 10, 2019 · The thermostat in your Cadillac DeVille's engine plays a crucial role in regulating its temperature. Customer: 2000 Cadillac Deville, Heater will not put out warm/hot air, everything else seems to work, all the controls seem to be moving the doors and other parts under the dash are moving, the blower is blowing, the A/C works just fine. Sometimes severly stated. Dec 1, 2014 · If the heater starts blowing cold and the engine overheats the coolant has stopped flowing. I pull over, turn off the key and wait about 5 minutes or less. . I warned him of the high cost of repairs as did everyone else but he HAD to have one. I drove it 20 min and the temp would go up to 230 deg and back to 215, but never over the half mark. Test for head gasket leaks by looking for exhaust gases or coolant mixing with oil. I have no antifreeze indications in my exhaust. Oct 29, 2014 · Cadillac Vehicle Discussion. Among them is overheating. Another odd thing is, the purge tank is boiling over when the temp gauge is only reading half way. Even at 240 the car didn't have that "overheat" aroma to it. it does not matter that I am running 70mph or 35mph. A little background: the heater wasnt putting out heat. The beautiful part of driving a cadillac is driving for 80M to 120,000 miles without consulting the manual. Anyone trying to get your money should be checked out BEFORE you Dec 22, 2021 · Ok good day everyone let me start by saying I have a 2005 deville DTS she has 78,567 miles on her owned since 2010 bought with 58,324 oil change every 3000 she is a well maintained car ok so start by had no heat in car it was summer so didn't do anything right away she ran fine about two weeks ago she started to get hotter than usual not over heating but line before while driving it would go Sep 30, 2012 · I have a 2001 STS and love it. It runs great when in park, even while pushing on gas for periods of time but as soon as I get it in gear and on the rd it will overheat within 3-4 miles and I will have to pull over and let it cool Jan 17, 2021 · The head bolt(s) pull due to failed block hole threads, the gasket begins leaking, it gets worse. For about a week no more over heating Apr 11, 2010 · Cadillac Vehicle Discussion. I had got a oil change Friday and now my oil life left reads 0% and all of my coolant came out from the bottom of my car it keeps telling me that my engine is idle and to cut engine off. Mar 8, 2012 · Today I drove it to heat it up after he cleaned the condensor and radiator with air and took the plastic cover off the top of the radiator to see if more airflow would help. later HEAT! Jan 3, 2010 · BEWARE OF SCAMMERS. Seemed to indicate a sticky thermostat, so he changed it and it seemed to be in good shape for a few days. Fill up the system and check for leaks. I thought it was because I was low on coolant, but after replacing the radiator, I still have no heat. cabin air temp. Aug 11, 2013 · Re: 2001 Cadillac Deville DHS AC blows hot air I picked up a recharge kit last night. However there is a problem. At the simplest level, there are two main reasons why the heater is not Oct 5, 2010 · 2000 cadillac deville overheating. Just got a 2004 Deville. After getting home from the 250 degree ride, the radiator was still just ambient temperature. Nov 15, 2019 · One of the worst problems that can happen to your Cadillac DeVille is overheating. If your Cadillac DeVille has blown a head gasket, you may find it running poorly or not at all. Jan 16, 2007 · Cadillac would like to sell another vehicle. I checked all fluids and changed the thermostat saw no faulty belts or hoses Now it overheats going a mile down the road and the message says stop engine I have tried turning on the heat when this happens I have tried letting it cool and rinsing off the radiator and engine compartment How do I prevent my Cadillac from overheating? There are some overheating causes that you can easily prevent yourself: - Always use high-quality coolants: change the coolant every 30,000 miles (50,000 kilometers) or after 2 years. Trained mechanics are scared of these things and not everyone understands them. source: overheating 1999 cadillac deville this sounds crazy but, on some of the old school cars, they have a cluch fan. The 4t80e doesn't like excessive heat, nor does ANY transmission for that matter. Dec 9, 2022 · 2001 Cadillac DeVille overheating with no loss of coolant no visible leaking, Car is very quiet, smooth ride, - Cadillac Cars & Trucks question Jul 17, 2013 · BEWARE OF SCAMMERS. 2001 Deville Overheating!!! Jump to Latest Follow Jun 29, 2014 · Cadillac Vehicle Discussion. Started with upper hose leak caused overheat. Aug 13, 2019 · Round 1 had the same symptoms of overheating with no fans and no windows. They flushed the entire cooling system, replaced thermostat and waterpump Jan 14, 2015 · I have a 2003 Cadillac DeVille sometimes when I get in the car and turn it on the heat or the air do not blow at all if I shut the car off and restarted it will kick back on this is happened 3 to 4 times now but I'm not getting any codes from the car is something going bad when it does work it flows just fine and gets hot or cold whatever I set it on its just every now and then I start the car May 5, 2011 · Just bought a 1998 DeVille with 42,000 miles. A thermostat failure Dec 22, 2019 · Replaced radiator and hoses. I have no codes past or present. Until then, all coolant flow is water pump >block/heads>water pump with a restricted flow through the heater core - line from the water crossover, across the firewall side of the engine, back to the water pump intake at the water pump cover/thermostat housing. But now I have to come back with some questions on my 2001 Deville with 176,269 miles on it. Ready for commuter car. Dec 21, 2014 · Re: Purge line 2001 Deville The purge line comes from the water crossover high point near the water pump cover/pump discharge area. Or I should say I have intermittent heat issues. 6 northstar The cooling system in your car is discussed endlessly in these threads, Cadillac Tech Tips, Northstar Performance sticky posts and main forum as well as up ^^^ in the Cadillac Technical Archive. I have so far replaced the waterpump and thermostat, found a couple lines that were leaking and replaced them. The fans work and the radiator is not Nov 20, 2023 · Cadillac deville reset. As maeng9981 mentioned, you would have to have a large leak from the cross over to induce May 8, 2024 · To resolve overheating in your 2001 Cadillac Deville: check for radiator clogs, cooling system blockages, and coolant circulation. Block casting metallurgy and head bolt length and thread pitch were changed for 2000 and again in late 2003. Given that the water pump works and intermittment thermostat issues are pretty much unheard of it doesn't look good. Beautiful car with a few issues. Feb 20, 2012 · I have a 2001 base DeVille andhave no heat coming through the heater. I then added the coolant to the full line and took it for a ride Oct 26, 2021 · Welcome aboard !!! B 0429 is the door that sends air to the rear seat console. Runs great. go to the deville forum, search "heater core replacement". The speed is controlled by the S/P relay in the box, not the 1 or 2 relays. I've had two occasions already where the car got close to overheating. Sep 30, 2016 · Hello there, many different faults can cause your 2001 Cadillac DeVille to overheat. Oct 27, 2022 · If there is no air flow from the air vents in the dashboard when you turn on the heater in your Cadillac DeVille, it means the problem is related to the fan or blower motor function. Jul 12, 2016 · Your 2001 Deville Northstar engine has several areas that cause overheating. When the motor gets above about 2000 rpms the vents heat up to where they are supposed to be. If you haven't done it, check coolant overflow tank for exhaust fumes and discolored or oily coolant and engine oil for any cream-colored effect. Question about 2001 Cadillac Seville. One was P and the other was B, I will get the numbers and post them. This problem is worse in town than on the highway. This vehicle should not be driven until the overheating problem is resolved as repeated overheating can Jul 27, 2019 · My cadillac Deville DHS has the overheat problem, but the place I took it to told me that it would be cheaper to just buy a new car then to fix or replace the Northstar engine! They even commented that Cadillac did that so the car buyer would need to buy a new car after a few 10000's of miles. One day the car overheated and I replaced the thermostat, and the heat all of a sudden started to work. 3. The purge line was clear but the car started getting overly hot. Need Help Please My car started overheating in traffic about a month ago. Start the engine, temp normal and drive on. Actual coolant flow is from the coolant crossover assembly via a hollow bolt near the upper hose connection (and the engine lift bracket) to the throttle body and out of the throttle body to the reservoir. May 11, 2010 · While driving it nicely it didnt overheat. i bought a cadillac deville with a 4. Mar 22, 2017 · Overheating no heat - Have a 2000 deville base, it overheats with no heat. At first i thought it was just the fans so i changed the relays and got the fans to work. Secondary air injector system P0741 h. So, I figured something may be connected. Don't take your northstar to anyone and everyone. (P 0300, for one) Bank 1 is the left (front) bank - cylinders 1,3,5,7 May 3, 2014 · Hi, new here, trying to find info on overheating '99 Deville 4. Had the rad and thermostat and hoses replaced a few months ago because there was a crack that was causing coolant to leak. Replaced hose and still overheat! Replaced Resevoir, Cap, flushed system, thermostat, pump, fan relays (fans work properly) I turn on heat and luke warm,(90 degree day though). Below you’ll find the symptoms, causes, and price of a Cadillac DeVille head gasket. After a week of me dragging him around, he did buy a 2001 Deville with 120k. You can use a kit that tests for exhaust gases in the coolant from Napa. FWD DeVille 1985-2005, Fleetwood, and 60 Special. I have a 97 Cadillac Deville with a northstar engine and have replaced it twice so far, so i answer this by experiencei've noticed to my two prior engines that went bad that the normal temp should NOT EXCEED 228 (normal), the red overheating light will come on at 250 and at 260 it will beep and tell you to stop engine - idle engine and will begin to Mar 9, 2013 · My wife's 99 Deville does not put out any hot air, just cool to lukewarm temperature. If it isn't leaking out the bottom, it may be going into the oil pan or into the combustion chambers, but let's leave that horrible possibility for last. check your heater core hoses at the firewall in engine compartment, even if they are slightly different in temp. Not having a functioning heater makes driving much less comfortable, and can be a sign of certain issues. No heat at all anywhere on the whole thing. Had coolant system flushed this week still does get hot when set at 90 also before and after the coolant flush the car takes a while to fully warm up 2002 with Dec 7, 2010 · No heat at all, feels the same from 60-90 degreesconstantly feels like A/C is on, even if it's off. The surge tank sits on a T-fitting on one side of the heater/block circuit. still was not cold last night. Other than to drop in as an observer, that is. i took my time, followed his procedure and 4 hrs. Several factors can contribute to engine overheating, and understanding these causes is crucial for both prevention and troubleshooting. May 29, 2014 · Where is all this coming from? All I read in post #1 is that it overheats with the A/C on. was the "mix door" replaced - or was the mix door "actuator" replaced - Jan 3, 2011 · Is the engine overheating ??? (You said NO) - With no A/C function called for, fans go to SLOW at 224 and FAST at 236. Aug 27, 2010 · Not sure about the OP's pre-2000, but 2000+ use a quick connect - metal/nylon lock - on the heater inlet pipe - the one from the rear of the crossover to the heater inlet at the firewall. Past owner said it was over heating and parked it. Nov 18, 2012 · Re: No heat on driver's side 2001 Cadillac SLS there are 3 air mix doors - drivers side - passengers side - and the rear - your fault code B1340 Air Mix Door One Movement Fault-is consistent with your symptoms - but this door was replaced last year. Car has been driven in between with no problems. water pump seem to be working ok. I have been in this career about 40+ years. Codes: C1232 h. FWD DeVille 1985-2005, Fleetwood, and 60 Special 2001 DeVille Base - OVERHEATING Oct 24, 2012 · After 2 days of car not overheating right back to acting up again. Anyone trying to get your money should be checked out BEFORE you send anything anywhere. Replace the overflow cap. 9's are not known for head gasket problems, though your symptoms don't sound good. SOURCE: 99 grand am gt overheating changed thermostat and try priming the engine block & radiator with water though the hose's & any hose you can squeeze to pump out the air lock with the filler cap off when running, sounds too much air is is in the system & the pump won't work dry. The cap is clean when topping off the fluid. I turned the heat to max and then I removed the reservoir cap and started my car. The head gasket(s) do not "blow". Jun 1, 2013 · Re: overheating problem with 2000 deville with 4. 1. It has a money back guarantee. 1 Answer . It seems you have done the likely suspects already. It has 147k miles. Common symptoms of overheating include smoke coming from under the hood, a pegged temperature gauge, and (eventually) a blown head gasket. The heater lines should both be hot with the engine full warmed up - it's full flow at all times - cabin temp is regulated using blended hot and cold air. Jul 5, 2024 · If you’re experiencing an overheating issue in your 2001 Cadillac DeVille, it’s crucial to identify the cause to prevent costly repairs or engine failure. Two, despite how intricate and intimidating this motor may seem, it's actually a quite simple design that works quite well. Car starts and idles fine. Here is the problem. Sep 1, 2019 · I will say, heat takes 15 minutes before I feel any and have to be driving the car in order to get any. Cadillac DTS Running Hot Symptoms Obviously, the main symptom of running Apr 1, 2006 · I turn on the heater at 90* to engage the fans but that does not help. Dec 2, 2007 · Re: 1998 Cadillac Deville overheating There's a couple things that could cause it. First time its ever done that. Get the cooling system air-free, check the purge line for steady flow. Is this a self May 17, 2017 · I have a 2001 Cadillac Deville that started overheating my car said engine hot AC shut down when I try to turn my heat on it's blowing cold air and when I go to take the anti-freeze cap off the reservoir the reservoir fills up with Antifreeze and then slowly weeks out but when I'm parked and shut the car off you can see it leaking down out of the car but you can't see from where Feb 24, 2008 · Have a 2002 deville base model and my heat when its at 90 just blows warm air a while back it could be at 64 and it would be blazing hot air but know it just warn air less but on ac. Jun 22, 2010 · My 2001 Cadillac Deville has about 140,000 miles on it. So my 24 year old son gets a little money and MUST have a Cadillac- nothing else. Luckily I was only going to Wal Mart right down the street from my house. when I hooked up the gauge that comes with the 134a refrigerant, and it appeared to read a little bit high. I turned the a/c on and drove it 5 min and it started overheating. I never experienced any overheating problems until a month ago. I had to replace the radiator, but before I did that I had no heat inside. This happened once on Friday and then again Tuesday. I'm thinking it's the heater core judging from todays symptomsbut would that be causing the pinging noises/overheating? Oct 10, 2015 · Re: 2001 deville running rough after overheating issue Your codes are not posted correctly - the numbers are all wrong. Ignoring an overheating engine can lead Mar 10, 2014 · Re: 1992 cadillac deville overheating questions Thanks for the quick reply. He drove it to work, (20 miles each way), took it to lunch, drove it home, all with no problems. Dec 30, 2013 · Cadillac Vehicle Discussion. So I've been rather perplexed as to why I have had so many issues in such a short amount of time with this Deville, unless I bought someone else's trouble. what is the cause for - Cadillac 2001 DeVille question no heat and Jun 8, 2013 · Unfortunately you have most of the classic symproms of a blown head gasket - BUT before you faint, do a search for "purge line" and follow the How-to's to check it and the hollow bolt/hose barb for blockage - the purge system is the only way air is removed from the coolant, thus preventing hot spots and water pump cavitation which leads to Apr 26, 2012 · turn the heater up to 90 - select the center vents - fan on HIGH - does it blast out heat - or does it get cooler in a short period of time - if the heater circuit is getting a good flow of coolant - you will get a constant supply of very hot air from the vents - if not - the air from the vents may never deliver hot air - Sep 12, 2021 · They run over to the water crossover - see the drawing of the crossover. Dec 14, 2008 · The 4. I have replaced sensors, surge/coolant tank cap, had it pressure tested, no leaks. Check the coolant sytem and About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright First, provided their are no visible coolant leaks and/or loss of coolant with no signs of leaks, I would thoroughly flush cooling system and replace coolant, then check and/or replace thermostat (you can place thermostat in boiling water to check for proper function), if you have tried these 2 steps and still are experiencing overheating you may need to replace your water pump which can be a Sep 2, 2011 · New Guy here, any help appreciated. 5 " below the top surface) of the reservoir. I have a 97 Deville with 127,000 miles on it. 7 listings Aug 18, 2012 · 2001 Deville overheating only when AC on Jump to Latest 8K views 5 replies 4 participants last post by basscatt Aug 19, 2012 Jul 22, 2010 · This is not every day with around town driving, but it does happen every time I've made a fairly regular 220 mile trip. it was my water pump so i had that replaced, coolant flushed, filled and got the air out of the system. head gaskets replaced 2 years ago at 99610 miles. I run the OBD and it gives me two codes. Sep 16, 2019 · Well, I haven’t been on this site for quite a while. Jury rigging the fans is a band aid. i can also have … read more Dec 14, 2013 · I am having weird coolant issues with my 2001 Cadillac Deville. May 2, 2019 · One of the most common (and inconvenient) problems with the Cadillac DeVille is when it has no heat coming from the heater. Check Details Jan 19, 2009 · i had the exact problem. No strong statements in owner's manual. I was told that it might be a blown head gasket but the more I check and test, the more I am thinking this is not the cause. , your core is plugged. If your car has been losing coolant, you know you have a leak. The car was at the dealer's where they changed the sensor and the thermostat but the problem continues. The GM name is "heater inlet pipe adapter". We just warmed up to around 60 here so I turned on my cooler while I went to get lunch. Why the need to top it off? If it is using coolant and blowing steam at start up, I'd get a block test kit and test for exhaust gases in the surge tank. I got the car dirt cheap and overall, it's in great shape for it's age. The heater is not getting hot at all. (Northstar engine) The car is pretty much flawless. I charged some into the system, with pressure still reading high, but the a. Would it have anything to do with the overflow tank? Wood grain steering wheel and wood grain trim, Very fast, 275 horsepower, 4. Went thru four auto shops and many mechanics and finally one found the catalytic converters clogged. I was just a bit concerned as I have had tons of issues with the coolant system and I'd like to get this car road trip worthy. Sometimes I have heat other times I don't. Aug 4, 2019 · The reason the heater is blowing cool air is that the circuit is airbound - as well as other low-flow parts of the cooling system. Sure it may help some. Forget it. Downshifting to run the engine (and water pump) faster will cool it down temporarily. It was blowing ice cold. Stored in garage, headlights look brand new. changed thermostat and water pump. I drove it about 10 miles, the alarm went off saying it was getting hot so I pulled over immediately and let it cool down. If you have ANY A/C function set (AUTO, DEFROST) then fans run all the time in SLOW and will not set a MIL. idling doesn't seem to produce any heat no matter how long I let it idle. You probably have air in the system caused either by a leak or blown head gasket. May 30, 2007 · I've been reading through the forum but haven't been able to determine any clear answers on my problem. BEWARE OF SCAMMERS. I paid $450 for it and it pretty clean. 1997 Cadillac DeVille Sedan 4. Was nothing left but scratching our heads. If your DeVille is overheating, stop driving it immediately to avoid damaging the engine. Do a search on the forum for "purge line" as it could be clogged. Of course, the dealer stated that they knew of nothing wrong with it but I suppose that could always be possible. FWD DeVille 1985-2005, Fleetwood, and 60 Special 2001 DeVille Base - OVERHEATING 2001 DeVille Base - OVERHEATING. Jun 9, 2020 · 2004 Cadillac Deville DHS 238k miles Bought at 100k miles, owned for seven years. Jul 9, 2024 · When driving your 2001 Cadillac DeVille, several underlying issues can cause the engine to overheat, including faulty components and mechanical failures. Also no heat from heater Replaced water pump and thermostat - idled fine but Started to get hot when I brought the revs up to 3000 rpm for about a minute or two. But loves to overheat as speeds of 60 mph or higher. Speed relay is a 5-pin, fan relays are Feb 4, 2006 · im back and runnin'. These are the codes : B0408 - Temperature Control #1 (Main/Front) Circuit Malfunction B0429 - Temperature Control #3 Rear Circuit Range/Performance B0419 - Current B0423 - Current Customer: i have 2001 cadillac deville. Be aware of symptoms like rising temperature gauges, steam from the hood, or unusual noises, smells, or leaks. The more you drive it, now you're compounding the problem. Some common leaks are the water pump weep hole (small Dec 12, 2003 · Hi, My Deville from 87 is not giving me any heat at all. 2001 Deville overheating under load turn heat on intermittent over heating. It goes from the front to below the radiator, is it in place. Check the line for flow and if it is clogged then you need to remove the hollow bolt/nipple and rod that out as well as check the entire line length for clogs. When I run the heater around town (in Phoenix) Yikes! The car seems to run at regular temperature Sep 9, 2011 · This product does work if the leak is not to big. Feb 25, 2014 · The temp gauge goes to the top and the engine is actually hot due to VERY hot air blowing out the heater. is this normal operating for northstar engine Jan 10, 2012 · Recently, it started overheating occasionally, and then would be fine for a while. i did the "smart" thing and parked the car over the winter with water instead of coolant too. I just read another post about "false boiling". So, I took an infrared heat gun and shot the thermostat housing. About a month ago I had a problem with the heat sometimes working and sometimes not. . Oct 6, 2016 · Hello all. I just bought a 2001 Cadillac Deville the other day, it's the first Cadillac I've ever owned. Possibly causing a sticking thermostat. When I see the bar go up to to the 6/8 I turn the heat on. A malfunctioning thermostat may lead to various issues and should be dealt with immediately. When I changed my thermostat my car did the same thing. There's no sign of any leaking fluids on driveways or anywhere in the engine compartment that I can see. At that time I found that the rear passenger door module fuse was blowing instantly when you put one in. Nov 29, 2018 · The heater core is full flow (coolant) at all times. Start by checking the purge line for flow. 2001 Cadillac DeVille Sedan FWD For Sale. Still no heat Anybody have any ideas? Jan 29, 2019 · First, provided their are no visible coolant leaks and/or loss of coolant with no signs of leaks, I would thoroughly flush cooling system and replace coolant, then check and/or replace thermostat (you can place thermostat in boiling water to check for proper function), if you have tried these 2 steps and still are experiencing overheating you may need to replace your water pump which can be a . 6l engine used auto parts orlando . I pull to the side of the road and try to let it cool. Loss of communication with dim P0410 c. i parked my car because i was having a loud noise in the engine and leaking coolant. now have 131000 miles . Check the little grille in the dash next to the steering column - that covers a tunnel to the cabin air temp sensor which controls . At 205* (idle) the coolant begins to rise in the res. On a DTS, the tank is barely above the highest point, as compared to a 2000-05 Deville. 6L. Heat had no where to go but backwards. One common culprit is a blocked radiator, which restricts coolant flow and leads to rising temperatures. Mar 16, 2019 · GM quit using the sealant tabs back in 2006 or so. No heat at idle indicates air in the line. Anyone trying to get your money should be checked out BEFORE you Jan 21, 2017 · Hey folks, new to the forum and new to cadillac. then i was changing the thermostat and realized that the water pump cover was cracked so i replaced that the water pump and the thermostat and its still over heating May 12, 2010 · Yes. Cadillac deville 2001 engine sedan gtcarlot1997 cadillac deville engine Cadillac northstar deville assembly heater core inlet & outlet pipes 2Cadillac deville 1997 1126 engine. I pulled the door panel off and unplugged the module completely from the door and it seemed to have fixed the problem. Changing your coolant will do this. Sep 14, 2012 · It also blew steam out of the A/C vents when I first started it up, had a strong odor of coolant inside the car, and it fogged up the windshield out of the defrost vents. You need to understand the cooling system and how/why it works. It started overheating. Title in hand Clean May 25, 2016 · Re: 2008 Cadillac DTS overheating problems The coolant level is critical on the DTS as compared to the Deville. It has a history of overheating if the outside temperature is 90+ degrees fahrenheit. Dec 11, 2014 · I was driving my 2005 cadillac deville tonight and first I noticed my heater wasnt working. Body in great shape, no dents or big scratches. It's been having some strange overheating problems lately and everything I've been reading points to a head gasket since they are so common to fail, although I'm always up for some second opinions. Jul 29, 2012 · My 97 Deville is overheating I had problems before where my idler pulley was melted but I replaced it. If your DTS is overheating, stop driving it immediately to avoid damaging the engine. Jump to Latest Oct 3, 2013 · Cadillac Vehicle Discussion. Car idled fine but 3 miles on the road it would overheat again. If the car overheats when at idle, then the most likely faults would be the cooling fan, thermostat, air in the cooling system, or a clogged coolant passage. 6666 Views Feb 11, 2019 · Turned on car heater randomly not working | Find answers to your 2001 Cadillac DeVille question from certified mechanics and auto experts. SOURCE: overheating,eveything looks ok. Apr 12, 2020 · I have a 2004 Cadillac deville I have change the water pump and the thermostat flushed out the heater core and put in a new radiator and I am still overheating at an idle when I press on the gas and rev the engine the temperature does go down but as soon it is at an idle it goes back up my antifreeze is full and I do have Flow and I do not have heat unless I am stepping on the gas and revving Oct 3, 2013 · Cadillac Vehicle Discussion. Please go to the Engines; Northstar forum and study the several sticky threads concerning cooling systems, fan operation, gauges, and the general thread on the cause(s) of head gasket failures. DO NOT start replacing parts. After the car sits for a couple hours and I can remove the radiator cap to check fluid level there is no significant loss. I noticed the water spurting from the upper rad hose, so I replaced it once the car cooled down. They just tend to clog purge line and heater cores, which could be your problem. Mine has 109K miles. Having said that, what about the large splash shield under the bumper. It allows gas and air bubbles in the coolant to pass to the airspace in the surge tank. I turned on the heat, and it blew cold air. The most common causes for blower motor not working in Cadillac DeVille are blown fuse, bad relay, resistor or control module malfunction, and faulty blower motor. At idle it still have very little vent heat though. No overheating and no check engine light. Aug 1, 2015 · Re: Overheating Northstar engine 2001 Deville I'm going to say this. 6L DOHC 32-Valve V8 Engine Photo. You could have dislodged some crud in the system replacing the tank. Tcc system Dec 4, 2012 · I have had my 01' Deville for quite awhile. Eventually the turn ac off-idle engine signal comes on minutes later. 6 engine the engine runs great i can have the car running at idle for about 1 hour and the tempeture is normal. Oct 28, 2022 · about 1 gallon - but almost no pressure - compare that to the volume of air in the surge tank - less than half gallon - BUT - its under 18psi - the ONLY "air" in the entire cooling system is contained within the surge tank - OP is not reporting coolant loss YET - and the fact that it doesn't lose the heater Nov 28, 2011 · I left the top shield of my radiator off during summer heat in Florida, no problem. That is probably not your issue. Feb 17, 2016 · Your thermostat is (should be) set to begin opening at 188 and fully open at 206. I am new to Cadillac ownership. Some of the most common symptoms of a bad thermostat are no heat, a spiked temp gauge, a blown head gasket, and more. A hot engine is usually caused by a few different things, such as the thermostat, water pump, radiator, or outside conditions. Started car up idled fined but started to get hotover after driving about 300 yards. and ultimately out the overflow. The radiator fans seem to run intermittently, I hear them kick on sometimes, but when it was overheating the last time I shined a flash light down there and neither were running. Car overheats. What is DIC voltage at idle and above 35 mph ? Jul 9, 2012 · Once you get the sloshing in the heater core, no heat via the heater core, boiling over in the reservoir, overheating on the highway, overheating with the a/c on, it's time to bite the bullet. I gave the car a full tune up on buying it, including a coolant change. I recently purchased a 1999 Cadillac DeVille D'Elegance. Was perfectly working last night. have same overheating problem. I will explain the problem as he explained it to me. I immediately pull over and it continues to go up. 2002 DHS strange overheating condition help!! Tags Feb 28, 2010 · I have great A/C but no heat in '98 Deville - changed thermostat - started to get some heat on lower heater hose, took for drive but no heat now - the fluid in the expansion tank is cold but under pressure - I did blow out the purge line when I replaced thermostat - some resistance but not sure of any blockage - engine running between 195 and 210 degrees - any recommendations? Jul 12, 2018 · From Cold for 15 minutes at idle it warms up to 200 and heater is hot, I then took it of WOT for 45 seconds and came back to idle, temp started to rise to 240 and heater cold, I took it to 1500 RPM and the temp fell to 212 in about 20 seconds and heater got hot again, it stayed there at idle for about 10 minutes and heater was hot, then started Oct 3, 2016 · Within about 5 minutes the temperature was reading right around 250. I took it on the highway and really got on it. Been having overheating problems dont know what it could be Im stumped at this point. I have had it happen before on an older vehicle. I have had to add quite a bit of coolant into it, so I began to dread the infamous head gasket failure. Right after that the temperature spiked to about 3/4 of the way up the gauge and the vent heat went ice cold. Durring the summer time I had to replace the waterpump (so they tell me) after that my radiator fan was not working so thae car was overheating, what I did is I connected the fan (radiator fan) to my low beam, and everytime I was driving I was puting my light on, so the fan was working everything was good. Oct 27, 2011 · Sounds like an airbound heater core and circuit, thus allowing the water pump to cavitate: these cooling systems operate on the block and heater circuits only until block temperatures reach 188 degrees. May 6, 2014 · 2001 deville base model Now overheating every day last 3 days. I was able to idle my way back home with the heat on high (not sure if that did anything) without it overheating. It seems like the pattern is that the t-stat starts to go 2 bars above the middle after I do 40mph for over 3-4 minutes. Owners/shops were blindly using the crap to excess - with problems like clogged coolant passages, heater cores, purge lines, and excess sludge in the surge tank. Nov 15, 2012 · I feel like i have tried everything but this car is still overheating. Dec 31, 2013 · Re: Overheating Northstar engine 2001 Deville-----with the engine at operating temp - feel BOTH heater hoses going through the firewall - they should BOTH be hot enough that you wouldn't want to hold them very long - if one hose is hot - and the other one cold - or noticeably cooler - the heater core is plugged up - resulting in no/low flow May 28, 2013 · Yep, what MoistCabbage said. 6 Liter LD8 Northstar engine. Sep 8, 2015 · FWD DeVille 1985-2005, Fleetwood, and 60 Special. Nov 15, 2019 · One of the worst problems that can happen to your Cadillac DTS is overheating. 145k, well maintained. Sep 1, 2012 · After spending 8k on my 2001 DeVille and all of the above fixes we found it still overheating. The recovery tank needs to be the highest point to keep the small amount of air in the system above the coolant. and read the procedure that crimson cardinal (sp?) posted. May 29, 2016 · I have a 2001 Cadillac deville northstar engine, which is overheating. If it gets too hot, it leads to overheating. I'm really not a beleiver of a mechanic in a bottle but I am willing to try things. Jun 21, 2017 · Looking at the temp gauge posted above by Submarinar409, mine normally always hangs exactly in the 12 o'clock position. i am convinced your heater core is plugged. They thought it was a cracked head or head gasket. Find and fix the problem. If the heat comes and goes it MIGHT be some sort of voltage problem - the HVAC system uses 3 or 4 electric actuators for the heat, air, and blend doors. Sep 18, 2023 · Cadillac DeVille engine overheating is a serious issue that can lead to significant damage if not addressed promptly. There's probably nothing wrong with the head gaskets and the loss of coolant overheat did no damage to the engine. There is a specific GM/Cadillac/Northstar TSB on coolant tablet use. Check the entire purge line for flow. cvajw pvbkjp dym vasr hjgbpr tnurwh sgwa carmbfl jjhrh fmyry