Boiling is really bad! Unlikely that the head gasket will survive this.
Since you already took care of the radiator that is probably not the problem, so what else? Have you tested the radiator cap .... if pressure is not kept ... overheating. Have you tested the thermostat ... is it opening as it should? Is it the correct thermostat .. By the way .. Is there a thermostat? ... people take them out thinking that will help .... it makes things worse. Does the fan belt ever squeal? .. Not tight enough to run water pump properly .... But don't over tighten as that will take out the bearing in the pump. Is the ignition timing correctly set ... this can also cause overheating. Then the bad one .... from prior use of tap water is the engine block plugged up? If you pull the drain plug (exhaust side of block near the firewall) does antifreeze run out quickly? When you say the head gasket is OK, how did you test? Go to a shop that can sniff the radiator for combustion gases is the best way. Carl R. Davis 2823 S. Rocky Hill Road, Galena, Illinois, USA 61036 750E, 750F, 10121, 105.62, 115.01, 115.41S4 -- to be removed from alfa, see http://www.digest.net/bin/digest-subs.cgi or email "unsubscribe alfa" to [email protected]
