Mechanics

PONTIAC SUNFIRE GAS PROBLEM

1998 Pontiac Sunfire • 170,000 miles

Water pump, started leaking, ran water till I could get it repaired, over heated, started rough idling and then wouldn' start again. Went to change plugs and all were wet with oil, went to change oil and oil is watery. My question is, is this a blown head gasket/warped head and leaking valve gaskets? Or do you have any other ideals. Oh, vehicle was not leaking anything out onto the ground after waterpump change. This vehicle has allways been hard starting ever since I bought it and am replacing ignition parts as well/bad fuel mileage.
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Chevymwernsmann
November 24, 2012.




The only way to be sure is to perform a test called a leak down test. You can buy testers to check for combustion gases in the coolant but they are inconclusive in many cases. Based on the info you have provided my first thought would be a head gasket. But you would need to take it to a shop and have the test done to confirm.

Homer1967
Nov 24, 2012.
That was my first thought, but can't run tests. Doesn't start right now. And I am kind of working on several problems at once. Had a bad coil, so replacing. Hard starting problem, so have ignition module off to be tested and other ignition parts. I was contemplating the ideal, if I was going to take off the head, that I just replace, because of the miles on the vehicle? (Full head with valves and guides) What do you think?

Tiny
Chevymwernsmann
Nov 24, 2012.
It's probably good that it won't start. You are just going to do more damage if you get it started anyway. Have it towed to a shop for diagnosis.
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Wrenchtech
Nov 24, 2012.
Yes that is the best thing you could do. You do not want to try to start it or keep cranking on it, because if you do have coolant getting in your cylinders you could hydrolock your motor.

Homer1967
Nov 24, 2012.

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