I recently replaced my tensioner assembly. The nut on the top stud of the alternator was corroded onto the stud and when attempting to remove the nut, the entire stud backed out. I was able to get the nut off the stud and everything cleaned up, but now I can not get the stud to seal into the water jacket and I have coolant leaking when the engine is under pressure. I tried red loctite first, that didn't work and it still leaked heavily. Then I tried Mr. T's FIPG after speaking to a Toyota Mech, and that did better but it's still leaking quite a bit. Threads and stud were cleaned between each application. Coolant was drained also between each. Any suggestions?