2002 Cadillac DTS

MINISTER134

MEMBER
2002 CADILLAC DEVILLE DTS
V8
FWD
AUTOMATIC
130,000 MILES

Hi. I have a 2002 cadillac DTS and runs warm. I have aleeady replaced the radiator, water pump, ac unit, and it still runs warm. Only when the ac is on is when it starts to really run hot. If I dont have the ac on I can pretty much drive normally. My fans turn on and turn the right direction but it still seems to run warm. If anyone can help me please because I have already dumped a lot of money into my car and dont know what to do next. Thank you.

Wednesday, September 8th, 2010 AT 11:34 PM

1 Reply

ERNEST CLARK

MECHANIC
1,730 POSTS

First, never chase down a problem by throwing money at it. This never works.

I'm not trying to lecture, but this will save you money next time.

I'll need to know where your needle is pointing on the gauge when it runs warm. Because this is normal for the engine temp to increase when the a/c is turned on, especially at idle. Then when you begin driving, the temp should come down a bit. And the hotter it is outside, the hotter the car will run. But it should never go over 3/4 to the red line.

If your engine temp is running that hot, then have the cooling system pressure tested, as it could be something as simple as the radiator cap is bad and isn't holding pressure, to there being a blockage in the system. (Air, rust, etc.)

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Wednesday, September 22nd, 2010 AT 5:59 AM