Well, not really a hot rod....................I am looking at buying a little veedub dasher with a fuel sipping diesel. The seller says the coolant gets foamy after running for a few minutes. He thinks it is a head gasket. I think maybe it is just a faulty water pump, a leak on the suction side, or something similar. There isn't any water in the oil. Can a head gasket cause foamy coolant? This isn't a hotrod question, but I couldn't find a forum for 80's oddball cars.