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Rod S

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5847 Posts
Member #: 2024
Formally Retired

Rural Suffolk

My decades old memory was slightly out.

It was a lower torque rather than a smaller diameter.

EDIT - no, both, the original was only 5/16", not 3/8" - END edit

See this article, it was because Leyland drilled that one hole shallower so didn't use full torque at the risk of damaging the block.

http://www.spriteparts.com.au/tech/stud.html

And it was a bolt rather than a stud/nut on the actual "S" and there is a replica.

https://www.minispares.com/product/classic/C-AHT281.aspx

Presumably that replica bolt is shorter than the stud.

I'm pretty certain all those years ago when we did it, we drilled full depth and used a normal stud and normal torque and got lucky with not breaking through (but the workshop we were using had plenty of "free" loctite in case....)

Edited by Rod S on 28th Feb, 2019.

Schrödinger's cat - so which one am I ???

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