I have a 1994 Ford Explorer. It overheated and shut off. I noticed the coolant would keep boiling over inside the coolant resevoir once the engine started heating up. What could be causing this. Could it be a blown head gasket?
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Ask Your Question1994 Ford Explorer
Question: Overheating
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Answer #1
DaveJHM October 22, 2010, 22:14Reply
MasterYour Explorer has a 4.0L V6 OHV engine with a cast iron block and cast cylinder heads, so in theory and real life experience, the head gaskets are not known particularly for failure. That said, anything heated hot enough to the point it shut off can do anything. Such as crack the head. Did the temperature gauge go all the way up when this happened? Boiling in the coolant reservoir does not have to be from the presence of exhaust gases bubbling back, but can be. Have you checked the basics - thermostat, heat present inside the car, etc? Start there and then move on step by step from there. Does it smell like exhaust in the coolant reservoir? That is another tell tale sign of a cylinder head/head gasket failure.
Good luck.
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