Steven Petersen
I'm Awesome
I just warmed it up again to operating temp/thermostat open with the radiator cap off. The coolant dropped like normal, but it goes into a surging cycle. Every ten seconds or so it will purge out about a pint of coolant. I let it run for about 20 minutes with the thermostat open and cap off. This air purge never stops. Is this an indication of blown head gasket, or a faulty thermostat?