Early Styled B

JDBRIDER · Jan 29, 2019

I am in the process of replacing the manifold on my 1945 "B". The old one has developed a hole in it. I got the manifold off and am in the process of getting the rusty studs out of the head. I have removed 3 of the 4 studs. I'm surprised that the studs thread into the head such a little way. The holes for the 3 that I have removed are 7/16, 9/16, and 5/8 inch deep. Doesn't seem like that would be enough to be able to tighten enough to stand being torqued. Is this normal and has anyone has any trouble with them?

Mike(NEOhio) · Jan 29, 2019

I just got the manifold off my late A. There's only 5/8 of full thread on the lower end of the studs. That's enough for a 7/16. I raised the manifold up and cut the studs with a hacksaw easily. I was expecting Gr 8 but these cut like Gr 5.

Mark-Ia · Jan 30, 2019

The reason is; there are pushrod tubes that go through the head. If your bolts or studs were any longer, they would go through the tubes and cause you a big headache. Pushrod tubes are available from www.handjmachining.com/

Mike M · Jan 30, 2019

How thick is the nut on top ? you only need the same amount of threads on the bottom to hold it too.

rustyal · Jan 30, 2019

Double the thread outside diameter to get thread depth. Anything more is overkill.

Early Styled B

JDBRIDER

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Mike(NEOhio)

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Mark-Ia

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Mike M

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rustyal

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