[freaknyea]

I'm having a hard time trying to find info. on an engine head stud for a '78 Spitfire. JD doesn't sell the part anymore and I don't know what size I need. I tried a vintage forum as well, but it was highly inactive and I wasn't having any luck there. The part number on JD's Parts site is M64722 - Stud.

(#6 in the following image)

Thanks.

 

[gbryanton]

Take a thread pitch gage [metric] and i would guess that it isa 10mm by 1.00mm ,the pitch gage will verify the pitch.Usually the stud that is threaded into the cylinder is the same length as what is holding the cylinder on..A

 

[freaknyea]

You know what's weird? I took the head off yesterday to see what was up with the stud. It's actually screwed out from the engine. Only about half of it is in. I tried to move it with my hand, but the thing didn't budge. It didn't look stripped and I'm really hoping the engine isn't stripped. I imagine I could put two screws on to screw the stud back in, right?

 

[gbryanton]

If you can take two nuts and tighten onto the stud and the first nut that you put on the stud take and turn the nut counter clockwise and the stud should come off.When you get the stud take and use some red locktite thread locker on the stud and tighten the stud back down and let sit for a 1/2 hour.Unlock the two nuts that you had jammed onto the stud.By the way when you get the stud out it would be a good idea to chase the threads in the cylinder where that stud goes.

 

[freaknyea]

Chase the threads? Don't know what you're talking about. I'll hit Google. Thanks for the info. though. This makes it a little easier.

 

[RJ Gleason]

That means run a tap in there to ensure that the threads are good.

 

[freaknyea]

Is it possible that the stud or engine is not stripped? Here is what happens... I tighten stud, seems pretty solid on there. I put the head on, tighten the nut, but then the stud starts unscrewing from the engine. I haven't used the locktite, yet, I just picked it up. I'm going to use it now and I would think that would fix my problem. It just seems odd that it's unscrewing like that.