Quote:
Originally posted by skidtron89
the easy test is to take off your radiator cap and see if a lot of bubbles are coming out of there. Also with it off if you rev the engine pretty high and all the water comes flying out you have a blown head gasket.
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actually, you're not going to get bubbles out of the radiator filler neck unless u have a blown head gasket, AND you do a pressure test on each of the affected cylinders.
and water boiling out of the filler neck only means that the water is boiling. since you don't have the radiator cap on to pressurized the cooling system, the coolant is going to come to a boil much earlier than if u had the radiator cap on. it has nothing to do with the head gasket. trying doing that test on your car. let the coolant come to a temperature of about 190 degrees, to a point where the thermostat opens.. rev the engine to 2500 rpms, and the coolant will boil over.