How hot is the engine in degrees F? With the thermostat out coolant flow through the radiator should be instant when you crank or start. Can you see coolant flow in the radiator?
Also, you may need to check cylinder comnpression and check for combustion gases in coolant. Your radiator fan works ok?
Did you try flushing the engine?
Tuesday, October 7th, 2014 AT 10:53 AM