how to tell when the head gaskets are bad
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1993 Ford F-150 Question: head gaskets
Answer #1patrick mannion from Greg Solow's Engine Room, August 22, 2009, 15:47Master
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, and Napa sell a tool to check to carry out this test. 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.
Answer #2backyard tech August 22, 2009, 18:41Master
Pat I'm sure you mean HYDROCARBONS not CO.
Answer #3rick Helbig March 12, 2012, 23:54Rookie
Look for white smoke coming out of exhaust or check oil dip stick for milkshake like foam.