a very difficult fix 1965

[Michael G.]

Re: a very difficult fix 1965

Not sure why we’re still talking about using JB Weld, it isn’t necessary. If there’s extra depth in the hole, its been put there by a drill size that is perfect for forming threads in. As such, just ignore the stripped threads in the upper part of current hole and run a bottoming tap until it stops. You will then have formed about three new turns of thread in the tap-drilled hole that’s already there. If you then then use a longer screw, one that doesn’t bottom in the hole, that’ll have plenty of strength for the current assembly torque and they are threads formed in real cast iron, not JB Weld of questionable strength.

[Mark G.]

Re: a very difficult fix 1965

Loctite does sell a thread repair kit. I've personally have never used it. https://www.napaonline.com/en/p/NCB28654

[Joe L.]

Re: a very difficult fix 1965

Loctite does sell a thread repair kit. I've personally have never used it. https://www.napaonline.com/en/p/NCB28654

Mark------

I tried it once with absolutely zero success.

[Bruce W.]

Re: a very difficult fix 1965

Hey guys,
Thanks for all your help. JB weld didn't hold up. After much thought and being the perfectionist that I am I have decided to pull the head and send it out to be fixed. Temporary fixes may be ok in some situations but my experience is they come back to bite you. Sometimes I wonder why I choose this hobby? Thanks again
Bruce

[Tony R.]

Re: a very difficult fix 1965

Sometimes we need to remind ourselves that we do this for FUN. 🙂

[Domenic T.]

Re: a very difficult fix 1965

Can you tap it for a larger bolt, then screw the bolt in and cut it flush. hen drill and tap it. It can also be made on a lathe and installed. larger bolt has to be tight and with locktite or JB.

Dom

[Joe L.]

Re: a very difficult fix 1965

Hey guys,
Thanks for all your help. JB weld didn't hold up. After much thought and being the perfectionist that I am I have decided to pull the head and send it out to be fixed. Temporary fixes may be ok in some situations but my experience is they come back to bite you. Sometimes I wonder why I choose this hobby? Thanks again
Bruce

Bruce------

I'm surprised that the JB Weld did not work for you. I've used it for much more difficult situations than the valve cover bolt.

In any event, I really don't think you need to go as far as pulling the head. The longer bolt solution that Michael offered will almost certainly work.