Question about 1998 Cadillac Eldorado
Do you have a coolant recovery tank? If you do most cars since the 70's have them to capture the coolant expanded by heat as the engine is running. Does the engine run hot according to the temperature gauge? The boiling in the reservoir could be traped air, have you opened the cooling system lately? If you have chances are you have trapped air. Usually public libraries have manuals you can look at and copy pages including trouble shooting sectionsthat can tell you if your engine might be prone to trapping air. You may also be having combustion gases getting into the cooling system from leaking head gaskets crack in heads or cylinder walls or block. The best way to check this out is to get a chemical test, it is a kit you can buy at most autoparts stores. It comes with a plastic chamber a suction bulb and a blue die that turns color to yellow if combustion gases are present. Do not pour blue liquid back into bottle of new die because it will ruin the new bottle. Also when using tester make sure you have the coolant level low enough that coolant won't be sucked up into the chamber this could give a false outcome, vapor only.
Posted on Oct 14, 2010
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Posted on Jan 02, 2017
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