Question about 1996 Cadillac DeVille

1 Answer

1996 Cadillac Deville Engine Overheating

Bought my 1st Cadillac at 72k miles just a couple months ago. Did a fluid check, changed oil, changed serpentine belt (another problem I had to deal with), but overall I'm enjoying this ride to the fullest. (Have an 02 Civic that just had tranny failure.)

Coming home on a 130 mile trip and get messege "Engine Overheating, Check oil, Turning off AC for engine protection, Idle Engine, Stop Engine." I pull over and after having the Road ranger fill me up with oil and check things out he says its the thermostat. Im fortunate enough to make it another 10 miles to a recommended mech. He calls me up and says ill need a water pump, tensioner, thermostat, and coolant ($30 mind you for coolant). $500 job. I decline and call around. Of course no luck as no one can diagnose over the phone. I do my online research and hear everything from simple thermostat problems to head gaskets. I ask the mech to check for gaskets and when I come to his shop he then tells me there are signs it could be just such.

I take it to my friend who is now a mech at a fancy dealership and he tells me "Hey the belt for your water pump is broken, thats why it overheats."

Im not sure what to do at this point. I trust my friend and will go with his call but what else could I do to prevent this kind of problem? What else should I do at 72k miles to ensure I can get some life out of this car?

Posted by on

  • rentfinder83 Jun 18, 2009

    Thank you kindly sir for your words. That Caddy manual is a must and will be acquired. I need to be able to teach my son about cars one day and its about time I learn.

    Is there a connection between the Serp belt and possible overheating? Afterall, I had no prior (heating) issues with this car up until I got that Serpentine belt done on 6/6/09 and the failure occured 6/10. Would I have some legal rights regarding this matter?

    And timing belt at 80K really?



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 957 Answers

If you want to make a more educated decision and not rely on others, you will need to buy the shop manual for the car. It will show it all. How to diagnose, to check, what tools are needed, torque specs, and set by step directions. It does sound like it overheated, If your friend saw that the belt tentioner was defective and that it needs a serp. belt, ask him to show you what he sees. After that repair you can then test the cooling system and see if it is back to normal. Thermastats are said to be changed every year but ive seen then go 5 years without problem. Do find the sorce of the overheating, if it is the thermostat then change it but if it is the waterpump then concider having the timing belt changed at the same time. It will be more cost efective and the belt is suppose to be changed after 80k miles. Good luck.

Posted on Jun 18, 2009

  • larry blais
    larry blais Jun 18, 2009

    Your friend (the mechanic) would need to prove that it was the fault of the last mechanic, that the problem resulted by. If The belt broke because the belt was faulty then you should be able to get a new one installed for free. If the belt broke because of another component (a pulley of some sort or tentioner) then I don't think so. If nothing is wrong was the engine parts(that the belt rides on) it would be very difficult to pin it on the mechanic and not the replacement part itself. I would try to work it out with the original shop first unless you don't think that is a good idea. Even though I'm a mechanic I know there are some real losers out there. So I'll understand if the answer is no. Good luck.



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

2003 Cadillac Deville transmission leaks from vent WHY?

Check the oil level on the dipstick for starters. Check it in drive and hot. Over full creates aireation (Frothing) in the oil. Other than that get a transmission pressure test done as you may be boiling the oil from a fault.

Mar 23, 2013 | Cadillac Cars & Trucks

1 Answer

2003 Cadillac Deville with 135,000 miles. Service engine light on p0741 code. any suggestions?

All you had to do was google PO741

Torque Converter Clutch Circuit Stuck Off

Given the years on the car & any slipping, I think your best to just rebuild it,once they slip your done

The previous owner never changed the trans fluid,no one does,
that's why they fail

Feb 01, 2013 | 2003 Cadillac Deville

1 Answer

Hi! My 1999 Cadillac Deville for about 2 weeks started messaging low refrig-ac-off. Check engine light on!.

When you change your oil is up to you,you set the
months & miles you go. Any car with a reminder
for oil is just a gadget

You were told that your low on a/c refrigerant by the

Now the check light related or not has to be addressed,
by checking for codes & diagnosing the effected system

Your a/c system needs repair,not added to, only to leak out
& polute the atmosphere

Nov 14, 2012 | 1999 Cadillac DeVille

1 Answer

1996 Deville sat for a few months...shifted fine before parked, now it won't shift out of 1st gear. Any suggestions? Codes are AC1312, TC0023 & RS0038 current. There are a few other codes but

Have the transmiision serviced with new fluid and a filter. Also do a OBD2 ele ctronic system control fault code test with a scanner or code reader.

Oct 30, 2012 | 1996 Cadillac DeVille

1 Answer

My 96 Cadillac Deville has 51K miles. Is it time to change my filter and fluid. Also should the shop that does it also add any additive that might help.

it's good to change the transmission fluid,but unless it's slipping or hard shifting or hard downshifting, i would wait another 15.000 miles but when you do change the transmission fluid i suggest you add lucas transmission treatment to the fluid change, it frees up sticky valves and does'nt break down as fast as regular fluid does.hope this helps!!!

Nov 10, 2010 | 1996 Cadillac DeVille

1 Answer

I have a 1991 deville, and it just started overheating about 1 month ago. I put anti freeze in it and when its driven alot or long miles, then it runs hot and the antifreeze is gone.

If the engine fan works and you get good heat from the heater then you could have a bad head gasket. First make sure you dont have a leak somewhere and the car is overheating from low coolant level.

Oct 26, 2009 | 1997 Cadillac DeVille

1 Answer

Problem with overheating on 1996 Cadillac Deville with Northstar engine. The information screen read "engine overheating", "idle engine" and "change oil" all within one minute. Are these issues related...

The oil life resets to zero after the engine overheats. Check for external leaks first, make sure the water pump belt is still there and turning. The most likely cause if the car has over 70,000 miles is head gaskets.

May 18, 2009 | 1996 Cadillac DeVille

2 Answers

199 Cadillac Deville - Electrical?

its a bad ground its a body computer thats shorting out water will do that

Jun 23, 2008 | 1999 Cadillac DeVille

Not finding what you are looking for?
1996 Cadillac DeVille Logo

484 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cadillac Experts


Level 3 Expert

81400 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22359 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a Cadillac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides