I have a cracked block in my 235. Crack is in the deck, between cylinders. Blows water into the crankcase. Running a zero pressure radiator cap.

Spring of last year, following the advice of Jerry (thanks) I was able to stop the leak. Used Bar's Head Gasket Repair, which contains sodium silicate without a bunch of extra additives. Followed instructions, flushed, cleaned the infamous drain passage behind the exhaust. This held until a 100 mile round trip to the tractor show at Goessel Saturday. Coming home the oil pressure dropped and temp ran about 195*.

Any recommendations for a step higher on the sealer? I don't have money to build another engine right now.

Fred
52 3600
69 C-10