Crankcase Studs.

[coomo]

Guys.I need to replace a crankcase stud.Car is 78sc.This is the lower pair that mate to box.Brought one home to measure, and it is 92mm.I used 1978 PET and 1986.Porsche did not make a 92mm (or even close!) stud,according to Parts diagram.
Am I missing something here?

[r lane]

Hardware store. If you need to be real specific, McMaster carr

[coomo]

yeah,I can get generic.I need precision.Thanks

[Tippy]

It's probably a 95mm stud. A lot of hardware is shorter than the specs. I assume this is so the hardware does not bottom out in a blind hole.

And there is nothing special about Porsche studs other than the headstuds AFAIK.

As stated above, McMaster-Carr or your local Fastenal should have them.

[Flat6pac]

The 3 short ones on the bell housing
999.061.034.02
Bruce

[coomo]

Originally Posted by Flat6pac

The 3 short ones on the bell housing
999.061.034.02
Bruce

Thanks Bruce.Its strange that these are 69mm.When the ones I removed were 92mm.Hope they are long enough.I presume they must be.

[rikinada]

are the studs interference fit threads at the case?
What is the correct locking compound?

[Walt Fricke]

You don't need locking compound unless removing a stud damaged the case threads. In this application, best to install your favorite case saver insert. Typically these studs stay put when you go to remove the nuts.

[30westrob]

The PET stud length is only the exposed length of the stud, not the full length. Rob

[boosted79]

Correct. Very confusing until you figure that out. I use Belmetric for all my metric fasteners, they have anything you'll ever need and then some.