Question about 2001 Cadillac DeVille

2 Answers

Car is running hot 2001 deville, new radiator, themostat, waterpump, still running hot, had it flush out.

Posted by on


2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Cadillac Master
  • 2,019 Answers

Could be lots of things.
For example, the temp sending unit could be bad and it may not really be hot.
You need to verify with a thermometer.
Or you could have put the thermostat in backwards, so the activator is not on the hot side.
Or you could have an air bubble big enough to be blocking the flow of coolant.
The fan may not be coming on, or the water pump belt could be loose.
The water pump could have been the wrong fit and it rubbing.
But it could also be unrelated, such as you must have over heated it when you discovered the water pump was leaking, so maybe you got it hot enough to blow the head gasket.
Check that with a cooling system pressure tester, and see if it oscillates when the engine is running at high revs. Make sure there is no leaks while and it holds pressure.
But it could also be something as simple as the antifreeze getting into the catalytic converter and plugging it up. You can check back pressure at the O2 sensor.
Make sure it is idling well and there is nothing wrong with timing, injectors, plugs, or wires, because a missing cylinder will make it run hotter.

Posted on Mar 23, 2011

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert whose answer got voted for 20 times.


    An expert who has answered 20 questions.

  • Expert
  • 161 Answers

As long as the mixture is 50/50 water to coolant then i would say faulty thermostat stuck closed parts have seen 3faulty in a row b4.hope this helps.

Posted on Mar 23, 2011


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

Runs hot its a new waterpump an thermostat someone said I need a valleypan gasket

valley pan has nothing to do with running hot unless you are losing water , you should do a radiator flush kit and after flushing it replace the thermostat with a new one

Mar 05, 2015 | Cars & Trucks

1 Answer

Can a radiator be unstopped, one side hot and one side cold when car runs hot

you got slight head gasket leak engine blowby gases getting oil in cooling system have engine compression tested. need find problem first the radiator shop can flush clean out radiator

Sep 08, 2012 | 2001 Cadillac DeVille

1 Answer

Half of my radiator is hot and the other half cold, my 2001 cadillac deville running hot

Sounds like you have a clogged radiator, i would recommend trying to flush it out before replacing it.

Sep 08, 2012 | 2001 Cadillac DeVille

1 Answer

2001 Olds Silhouette overheating

Could be a clogged heater core or stuck inline heater valve. Did you have the system flushed?

Jan 03, 2018 | Oldsmobile Silhouette Cars & Trucks

1 Answer

I replaced my waterpump and all gaskets in the housing. now the temp gauge on the DIC jumps high and low then dissappears and my service light came on...whats the deal?

once you have changed the water pump you refill the radiator to the neck and and run the car with the fan on and wait till the themostat will know this because the antifreeze level in the radiator will drop,let run and refill radiator and replace the cap.fill the overflow bottle to the full mark. on some models you have a bleeder on top of the engine to bleed the system. i would also pressure test the radiator cap or replace it as this is not exspensive but a vital part.

Nov 28, 2011 | 2000 Cadillac DeVille

2 Answers

Why does my 2001 cadillac deville keep running hot. ive changed the water pump and the thermistat

Well there could be a couple of problems if you live in a hot place you should change the thermostat to a lower tempatured one so the water will circulate sooner that will help it run cooler if that doesn't do it it might need the radiator flushed.

Jul 29, 2009 | 2001 Cadillac DeVille

2 Answers

Car is running hot. Just got new hose put on and radiator flushed and themostat. What is the problem?

Check the availability of morte than one thermostat for your engine. You may have the wrong one in and it's not opening at the lowest setting. Causing the engine to overheat before it will allow the coolant to circulate properly. The other answer lies within the efficiency of your waterpump.

Jun 23, 2009 | 2000 Daewoo Leganza

1 Answer

Vehicle runs hot and overheats, no thermostat,fans run full speed,waterpump appears fairly new,flushed and cleaned radiator and still same problem

I would have the radiator roded out by a radiator shop, this of course requires removal of the radiator to complete the rod out.

Apr 14, 2009 | 1995 Buick Riviera

Not finding what you are looking for?
2001 Cadillac DeVille Logo

172 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cadillac Experts


Level 3 Expert

79865 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 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