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Friends new 572. Ported Indy's, Koleno block. The radiator is full of green slimed Brad Penn and coolant. I noticed it built pressure in the radiator after about 1 minute and a half of running time. Tomorrow I'm going remove the oil feed lines at the heads. Put my pressure tester on the radiator. Then put compressor air to the head oil feeds. If it shows pressure in the coolant I know that there is a breach in that head. Another possibility is the oil feeds in the block are seeping between the head and block deck? Cometic gaskets copper sprayed between all layers. No external water or oil leaks. Oil looks fine. Any ideas?
Doug


Pull the plugs before you pressure things up.


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