Engine running hot

2004 CADILLAC CTS
183,000 MILES • 3.6L • 6 CYL • AUTOMATIC
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CATHYWEST4209
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Replaced radiator, water pump, thermostat, still getting hot. What is left to fix?
Mar 18, 2020 at 1:11 PM
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ASEMASTER6371
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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
Mar 18, 2020 at 1:22 PM
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CATHYWEST4209
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I don't hear pressure when I removed the resivour cap is that a problem? And why don't I?
Mar 18, 2020 at 1:32 PM
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ASEMASTER6371
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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
Mar 18, 2020 at 1:35 PM
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KASEKENNY
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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
Mar 18, 2020 at 1:39 PM