It is possible for a head gasket to leak and not get in the cylinders, which then you would see heavy white smoke. Because you are over heating, this could be that the combustion is actually entering the coolant. This sends extremely hot air into the cooling system, and will over heat your car. The best way to test for this is to hook up a no spill funnel. Fill the cooling system all the way till the funnel is half full. After the thermostat opens the coolant should stop bubbling. How ever if it continuously bubbles after the thermostate opens the head gasket is most likely blown, and the continuous bubbles are from the compression.
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Friday, February 3rd, 2006 AT 9:32 PM