Possible blown head gasket?

[Admiral]

Originally Posted by flatjack9

If I run anti-freeze in my engine, it does exactly what yours does. Seems like anything over 2500 rpm and I get foaming. Running straight water I have absolutely no problem. My 39 has an open radiator - no pressure cap.

Ah, great to hear! Foaming sounds like normal operation rather than an actual problem. I can sleep better tonight!