Question about 1998 Cadillac DeVille

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There was an over heating problem. So I had the water pump changed, thermostat changed and the over flow jug changed. The car still goes over 200 degrees F. The radiator had stop leak in it. So it was taken off and with the water hose washed out. But it is still boiling over from the overflow jug. What do I need to do to stop the over flow problem.

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200 derees is NOT very warm, only 5 degrees over thermostat opening...normal would be up to 250 or so...Still, boiling out is not normal...Have the cooling ssytem checked for exhaust fumes. There are several tests for this...
The repair is VERY expensive and may exceed teh value of the car. The issue is the head bolts strip out of the aluminum block....very pricey to fix.

But do the test first. Also, there is a smaller size bleeder hose between the engine and the fill/overflow tank, be sure it is not plugged.

Posted on Sep 07, 2010

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