Q: Car is leaking water had pressure check no leaks from engine. on 1995 Oldsmobile Aurora

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The car over heats then dumps all the water out of engine. No water in the oil runs good other than the overheating issue. recently had oil changed and new thermostat put on.
(1) Answer
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If a pressure test has shown no leaks, and the thermostat is new, make sure the water pump is circulating water, he radiator is working efficiently and the electric fan cycles on and off. Perhaps your engine has a blown gasket. The most accurate way to test for a blown head gasket on a gasoline engine is to test for the presence of carbon monoxide in the cooling system. Snap-On, Matco (part # CO 2000), and Napa sell a tool to check to carry out this test. Another link to a supplier of this tool is Carbon Monoxide is only present if there is a blown head gasket or cracked cylinder head. I think the napa part number 700-1006. . Signs of a blown head gasket are coolant loss (frequently have to top up the coolant level of the engine without seeing an obvious leak), experiencing over heating or rough engine running or the presence of white sweet smelling steam from the exhaust. A badly blown head gasket may allow engine coolant and oil to mix.
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