I drove it for 5 miles without getting hot. Parked it with the engine running, the temperature slowly rose to about 3/4 on the temp gauge. The fan never came on, I tried turning the air on to see if the fan would kick on and it did not work. The coolant started boiling in the reservoir tank and leaking from the cap. The car has A new cylinder head, water pump, and thermostat. Could the radiator be plugged? Sound like a coolant flow problem?
