Question about 1996 Cadillac DeVille

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96 cadillac 32v over heating. thermostat is replaced and no water is leaking but after 30 mins it hot. no water in the oil.

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Hello there:
What i would recommend that you do is once when the car heats up feel the top radiator hose and see if it is hard if it is than the thermostat is either in backwards or it is not the right one and also yo need to make 100% sure that the air is out of the system and that the radiator is at the proper level and the recovery tank is at the proper level
Furthermore when the car is cool open the radiator cap and start the vehical and look at the fluid inside the radiator to see if you see any bubles if so there is a air leak probably on the thermostat housing and you wil need to check the tightness of the gasket or see if the gasket got cut during installation.
next check if the water is moving (flowing ) around if not your water pump may have failed and could be causing the car to over heat OK?
I hope that this has been very helpful for you>
Best regards Mike

Posted on Nov 12, 2009

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This sounds like the rad is blocked up, if it was a head gasket it should boile up a lot sooner that that, you may need to have the rad flushed out or deskeled

Posted on Nov 12, 2009

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