Engine will overheat sporadically. New water pump and thermostat with no improvement. I can stop and turn it off, and the coolant is boiling in the reservoir. After only 15 or 20 minutes, I can re-start it, and the temperature will return to normal, maybe climb again shortly, or stay normal. I even tried running without a thermostat with no improvement, so I put another new one in, just to be sure. Both radiator fans seem to be working OK.
Flush out the radiator and then bleed the cooling system and see what happens-Continue to overheat-have it chemically tested-
November, 13, 2012 AT 12:16 AM
Thank you for your response. I just had the water pump installed last week, which would have pretty much drained the system, I guess. They used 2 gallons of coolant to refill it. Wasn't a flush, though. I'll try that. I've never heard of the chemical testing. What chemical and test for what?
November, 13, 2012 AT 12:23 AM
They call it Bloc Chek its liquid that turns to different color when it indicates a blown headgasket-