Question about 2001 Cadillac DeVille

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COOLANT LEAKS ONLY WHEN CAR IS BEING DRIVEN. NO LEAKAGE ON GARAGE FLOOR. INTERMITTANT CONDITION. 2001 CADILLAC DEVILLE

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From the way you describe it, It is likely the pressure cap on the surge tank (expansion/overflow coolant tank).
It is probably worn and no longer able to hold the pressure.
The cap is an inexpensive replacement so do this first.

Posted on Sep 14, 2010

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PICTURE OF PURGE LINE DIAGRAM FORTHE COOLANT SYSTEM OF A 2001 CADILLAC DEVILLE DHS ENGINE


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May 14, 2011 | 2001 Cadillac DeVille

1 Answer

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1 Answer

2001 cadillac deville, overheats without loss of coolant


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Coolant Loss


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2001 Cadillac Deville coolant bleed screw Location??


I had the same problem with my 2001 Cadillac Deville, like you I had replaced literally everything thermostat, water pump, radiator, temperature sensor, reservoir and cap, hoses etc....I didnt have any leakage. I was told I had air in my coolant system. After a lot of research and running across the right mechanic I was able to locate the bleeder and remove the air from my lines. No problem since. The bleeder is located on yhe left side of the radiator on the crossover, mines was sideways..Hope this helps someone before they spend money for new head gasket problems..Try this it helped me....

Mar 25, 2009 | 2001 Cadillac DeVille

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