[s-cars] Turbo to Exhaust manifold studs

[brian hoeft]

Hi Manny,

I thought those studs (or just the last ones I replaced) were all threaded
shank but generally the shorter, threaded section of studs go into the
internally threaded section of whatever, leaving the longer threaded section
for the attachment (in this case a turbo) and lock nuts.

As for the lock nuts, they are just that, lock nuts, and wont thread past a
few threads because that's how it deforms while locking into place.

Hopefully it was one of the 2 lower studs, otherwise its gona be a bit
difficult to turn them in snug. Snug for these, for me, is turning them till
they stop with a good amount of wrist strength, not forearm tight. But if
you are using the 2 nut method, it will only allow so much before they spin
together, thats usually tight enough. And I still use thread sealer..

-Brian



.

On Sat, Oct 9, 2010 at 12:21 PM, <manuelsanchez at starpower.net> wrote:

> Fellow S-heads,
>
> One of the 4 turbo to exhaust manifold studs has worked its way out. I have
> a new replacement in hand but wanted to confirm with those wiser than me
> that the end of the stud that goes in first is the end that is closer to the
> unthreaded "shoulder". This untrheaded portion looks like that small section
> of worm thats a bit thicker than the rest of it.
>
> Never having installed one of these I was wondering what the orientation
> should be and how far in the stud should thread into the exhaust manifold
> before I know its in far enough. It does not seem to bite into too many
> threads before I stop threading it in by hand...wondering if this is normal.
>
> The copper nut also seems to only thread onto the stud for a short portion
> when threading by hand. I was also wondering if that is by design, so that
> when I put a wrench on it finally the nut will thread the stud further into
> the manifold.
>
> Thanks.
>
> Manny (95.5 urS6 - front suspension finally installed)
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