If I thought there might be ahead gasket problem contributing to a cooling
problem I would start the truck with the radiator cap removed and watch for
the appearance of bubbles in the neck . This would be a constant stream of
bubbles if the cylinder is dumping gasses through the coolant. Usually you
wont wonder for long if you have a head gasket leaking into the water jacket.
It will overheat almost as badly as a stuck thermostat.
Dave Handley
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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