Maybe someone can help me here: on my new Pantera with an refurbished cooling system (setup completely stock, new hoses, new radiator&fans, new correce Cleveland T-stat) - when I came home today after a 30 min ride (cold temperatures outside), the engine temps were 190F all the time, I parked the car and had it idling for a couple of minutes with the fans on (temperature controlled switch in the radiator). When I shut the engine off I could here really loud the fluid boiling in the header tank - it made noises for at least one minute. I let it cool down, opened the tank and it was full (as it should be).
I have bled the cooling system before as suggested in various posts. But the rumbling noise in the tank makes me a bit nervous. The fluid should not be boiling :-)
Thanks for any insight here!