Stripped Threads in Exhaust Manifold Mounting Holes
Posted: Mon Apr 03, 2006 10:56 am
Well I finally did it. Too many removals, replacements, and ham-fisted torqueings on my part. I stripped out the left rear hole for the exhaust manifold bolt. I’m still using stock cast iron exhaust manifolds so using those long bolts into the head.
I’m wondering if a longer bolt might find enough threads ?
Probably not a good thing to try.
I could drill out to the next size and use a larger bolt.
Don’t like having one different than all the others though.
Can the hole be drilled deeper without hitting a water jacket or something ?
Probably not a good idea either.
So there’s the Helicoil insert. Probably the best choice, but is there a better alternative ? Seems I remember reading about another type of insert recommended for Porsches that was stronger than a Helicoil. Any of you guys know about that one ?
Any recommendations welcome.
Thanks,
Merril
I’m wondering if a longer bolt might find enough threads ?
Probably not a good thing to try.
I could drill out to the next size and use a larger bolt.
Don’t like having one different than all the others though.
Can the hole be drilled deeper without hitting a water jacket or something ?
Probably not a good idea either.
So there’s the Helicoil insert. Probably the best choice, but is there a better alternative ? Seems I remember reading about another type of insert recommended for Porsches that was stronger than a Helicoil. Any of you guys know about that one ?
Any recommendations welcome.
Thanks,
Merril