944Fest (aka Dan P)

Ah, Costas.. you're a funny guy. IF a relief cap failed, over pressurized a hose or seal and it let go, THEN maybe I could see a RAD cap blowing a head gasket. I hope that is what you are implying. For coolant to find it's way into a combustion chamber it would first need the HUGE pressure from the other way to mine a way out.

As for the guy overheating at the track after shutdown, I saw an 89 951 do that exact thing. Bleeding the air out repeatedly did not solve it. IIRC the guy had the radiator removed and cleaned, the problem went away. I can't verify it but could provide contact info if it would help. PM me