WC intake heater baffle stud

[Life is Good]

Does anyone know the specs on the stud that goes into the exhaust manifold to adjust the intake heater baffle? I believe the portion of stud tgat goes into the cast iron manifold is a coarse thread vs fine for the end sticking out with brass nut. I need to know the thread specs inside tge manifold.

[Sniper]

I would find the size tap that fits, you ought to clean out the threads anyway.  Other than that, I can't help, sorry.

[Sam Buchanan]

Uh......maybe grab a handful of bolts and see which one fits??

 

When I removed the apparatus from my P-15 manifold a found a common bolt that would fit in the manifold, but don't recall what it was....probably 5/16 or 3/8.

 

Edited November 26, 2020 by Sam Buchanan

[Life is Good]

Im extracting the broken stud, so i drilled the center of stud out and i was hesitant to just try any tap without knowing proper specs. Anyway i went in with a 1/4 coarse tap and that was perfect, got clean original threads again. And the old residual stud threads spiraled out. Life is good once again. So if anyone asks you during thanksgiving dinner what size stud fits into a 40’s flathead 6 heat riser adjustment deelio.... you can tell em 1/4 coarse. They will be thankful I'm sure. 

 

[Sniper]

Ah, that's different.  hard to tell from the pic, but it just looked like a hole to me, lol.

 

 

[Sam Buchanan]

8 hours ago, Life is Good said:

Im extracting the broken stud, so i drilled the center of stud out and i was hesitant to just try any tap without knowing proper specs. Anyway i went in with a 1/4 coarse tap and that was perfect, got clean original threads again. And the old residual stud threads spiraled out. Life is good once again. So if anyone asks you during thanksgiving dinner what size stud fits into a 40’s flathead 6 heat riser adjustment deelio.... you can tell em 1/4 coarse. They will be thankful I'm sure. 

 

Ok.......you didn’t tell us you were extracting a broken stud......glad you got it out.