they sell this stuff at NAPA (might sell at autozone/discount auto) called blue devil (not sure of the name), but its a really good product. its about 60 dollars a bottle, and temporarily fixes blown headgaskets and similiar problems. its a liquid that you put in the motor, then goes to the leak and once it heats up it seals it. they use it at my school when people need a cheap temporary fix, and i think it lasts for like 5k miles. im not sure, of the exact time it lasts, but you should definitely look into it.