Engine running hot

CATHYWEST4209

MEMBER
2004 CADILLAC CTS
3.6L
6 CYL
AUTOMATIC
183,000 MILES

Replaced radiator, water pump, thermostat, still getting hot. What is left to fix?

Wednesday, March 18th, 2020 AT 1:11 PM

4 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

Good afternoon.

I would have a leak down test done to check for a failed head gasket. If compression is leaking into the cooling system, it will run hot.

https://www.2carpros.com/articles/head-gasket-blown-test

https://www.2carpros.com/articles/engine-overheating-or-running-hot

Did you have this test done?

Roy

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Wednesday, March 18th, 2020 AT 1:22 PM

CATHYWEST4209

MEMBER
4 POSTS

I don't hear pressure when I removed the resivour cap is that a problem? And why don't I?

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Wednesday, March 18th, 2020 AT 1:32 PM

ASEMASTER6371

MECHANIC
52,797 POSTS

That could be either from a bad radiator cap or you have a leak, such as the head gasket.

You need to have a leak down test done to see if it has a failed gasket.

Roy

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Wednesday, March 18th, 2020 AT 1:35 PM

KASEKENNY

MECHANIC
18,907 POSTS

Just to add to this, are the cooling fans coming on?

I attached some testing which includes the things you replaced but also a few other things that we need to check.

As the engine begins to get to 210 degrees F the fans should be on high, if not then that is the issue. Let us know what you find with all this info. Thanks

Images (Click to make bigger)