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Ian C
Ian C
South Yorkshire, UK
Posts: 574
Joined: June 2008
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Thread Like Summary
Allan G, gavin eisler
Total Likes: 2
Original Post (Thread Starter)
by S-NJ-W
The front most rocker box cover thread that holds the stud into the head of my '72 A65 is stripped.
However the head is NOT the original head. It's pre OIF modifications, maybe 1966.

The thread I mean is the one that holds part number 65-0876.
Looks like it was originally tapped 1/4" British Standard Cycle - 26 TPI.

Any advice on how to deal with it? I am guessing that BSC helicoils might be hard to find.
Has anyone re-threaded the rocker box stud drillings in the cylinder head ?

Thanks for the help.

Liked Replies
by Allan G
Allan G
I wouldn’t go any bigger than 1/4, you have a small area on the rocker box that you have to try and seal.
1 member likes this
by Tridentman
If you can't get hold of 1/4" BSCy then 1/4" BSF is virtually identical (same tpi).
1 member likes this
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