Try Bars Leak, or K&W block sealer for a temporary fix. I bought my 96 4.0 OHV in February, and it was getting water in one cylinder and leaking from under the manifold. The hot antifreeze smell was very apparant. I put Bars Leak in it, and have not had any more water in the cylinder since. On a recent trip from NE to AZ and back, it did develop a small water leak, more of a seep, from under the right head. I have not had to add any coolant yet. This is just a temporary repair until I can get new gaskets. But, it is advertised that the manufacturers add K&W when new.