if your motor is cast iron or alluminum,??? alluminum your going to pay for new heads and gasket, but if you have cast iron motor i can help you. if cast go to your local pharmacy ,not auto parts store pharmacy, and get a bottle of sodium sillicate, it comes in a jar like mayonaise , and drain your motor and radiator .as it is not compatible with anti-freeze .and then put in sodium sillicate and water, and it will seal cracked block or blown head gasket for the cheap ass price of 6.95 cents. if this works for you great, send me the differance ok, ha ha ,