Michael
Happened to me too, but the other way around. I accidentally bought studs for a
100 when I restored a 3000. I couldnâ??t understand why the studs didnâ??t fit,
until many swear words later I discovered my mistake.
Per
Skickat från min iPhone
> 26 juni 2020 kl. 16:55 skrev Michael Salter <michaelsalter@gmail.com>:
>
> 
> The 100 that I'm restoring has been previously "restored" so I'm being pretty
> careful with threads and running taps and chasers through any that look even
> slightly suspicious.
> The exhaust flange studs on a 100 (2K7708) are 3/8" BSF and 3 years back the
> ones on this engine looked to be in such good shape that I decided that
> running a chaser down them wasn't necessary.
> Silly me!!
> With one of the last jobs being installing one of my specially made single
> sweeping curve front pipes I confidently started running the BSF nuts up to
> secure the flange. On the last one the nut started well but after a few turns
> became tight .... as is my usual practice I decided to back it off and run a
> chaser up the stud to clean up the thread.
> Ahhh Houston .... the nut had seized tight on the thread and despite every
> trick the stud eventually broke off at the top of the thread.
> Now this is on an engine that I have painstakingly restored however, there
> was no option but to remove all the manifolds to replace the stud ...
> Only after all that did I discover that this 1 stud had been replaced with a
> UNF and that was why the brass nut had locked onto it
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