I think the thread confusion may be due to the French metric deal on the
engine so we identify with the 6x 1.0 and 8 x 1.0 fasteners on the engine
and mentally connect the transmission with the engine as a package. But the
transmission was not part of the original XPAG engine deal, so the bracket
mount has the later British BSF threads.
Has anyone checked the transmission cover bolt's threads? :>)
Dallas Congleton
1953 MGTD
1967 Austin Healey 3000
----- Original Message -----
From: "Bob Grunau" <grunau.garage@sympatico.ca>
To: "Dave & Liz DuBois" <ddubois@sinclair.net>; "Douglas Ormrod"
<Douglas.Ormrod@neurological.org.nz>
Cc: <mg-t@autox.team.net>
Sent: Wednesday, November 09, 2005 9:27 AM
Subject: RE: Exhaust bracket follow up - BSF rukles OK!
> Well, well. Here I thought I knew every bolt on a T type. I was one of the
> guys voting for 8 x 1.0 mm metric thread based on all other bolt threads
of
> that size being 8 x 1.0 mm on the TD/TF gearbox. So after seeing the email
> below, I thought those guys are smokin' the same dope or the same DPO
> re-tapped the threads. I went out with a new 5/16" BSF bolt and a new 8 x
> 1.0 mm bolt to try them on various TD/TF gearbox casings. Sure enough,
> 5/16" - 22 tpi BSF bolt fits on seven different casings. I stopped there (
> others were buried under other junk ) as surely the same DPO can't have
> visited Australia, USA and Canada. So I was wrong, Ed was right, 5/16"-
BSF
> rules for the exhaust bracket mounting to the gearbox.
> Bob Grunau
>
> To all,
>
> Of course Douglas' bombshell that the threads were 5/16 BSF (according
> to Ed Woods) sent me directly to the basement to check a spare
> transmission case that I have (after all, we have been assured for the
> past how many years that all of the fasteners in the XPAG/XPEG engines
> and the transmissions are all Nuffield Mad Metric). Sure enough, the
> threads for those two positions are 5/16 BSF, but ONLY for those two
> positions, the rest of the threads in the case are Mad Metric, with 8 X
> 1mm being the large majority of threads. We now all have a great tidbit
> of trivia regarding the TDs & TFs that will come in handy for winning
> bar bets. Thank you Douglas and Ed.
>
> Cheers,
> Dave
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