Ok, here we go........ my grandma's van. We thought it had a blown head gasket, well a mechanic told us that anyway. It would get to running temp and keep going up. It would smoke on start up but then mysteriously go away. We ran a compression test on it and it was just fine. No film on the oil cap. The coolant was only a tiny bit low, Minuscule. So can I rule out a head gasket at Least....?
2. What could It be then if it's not a head gasket? Water pump, thermostat?? I don't know, what do you guys think? Let me know because this is her only car and she needs it to work.
It has the GM 3400 V6/ LA1 A 2002 Pontiac Montana
