@DannyP posted:So the one bolt that keeps spinning is stripped. The only solution is the stepped stud that I linked above, and a tap/drill to replace it. Wolfgang's posted article is a step-by-step of what to do.
Bolts into the bottom of the case are a BAD idea, studs are better. Somebody else on here with a type4 found that out the hard way with his header bolted to the heads. The bolts stripped out the soft threads in the head. ALWAYS use studs in aluminum or magnesium.
It's either the stepped stud or a thread insert. And DON'T use a heli-coil, they are JUNK.
If you want to use an insert, use time-certs, a much better fix. It's the right way to do it.
After a Triumph dealership stripped 2 out 6 theads on my Sprints valve cover, I took them all out and installed Timserts. It’s how they’d always do threads in aluminum or magnesium if they took the time IMO.
As for JB, I’d be leery. I have used a Permatex product called ThreadRestorer (iirc) a couple of times to good effect on low torque applications, but I doubt you would get good results on oil filter plates because I doubt you could get the work area clean enough without removing the engine.
When I just did the two in my case, I cleaned the threads as best I could and used Permatex Thread Sealer which, afaik, is Red+, and let it set for 24 hrs.