Coolant overflow probs after head gasket change
Hey guys, need some help here please --
Recently replaced my head gasket and I'm now experiencing very hot running temps (110 to 120). Aux fans work fine. Apparently I have a leak in the coolant system somewhere, because I get coolant overflow when high temperatures are reached, even when driving. Expansion tank cap just replaced along with thermostat. All hoses are tight. Any other ideas where the leak/problem is coming from?
Does the overflow tank itself pressurize and possibly a bad one could be the culprit? How about the expansion tank?
I'm stumped. The radiator is only about 6 months old.
Any help appreciated.
'91 300E, 208k miles