Originally Posted by TimT (Post 12549920)

Is that a lock nut?

Originally Posted by TwoBluPorsches (Post 12549925)

Got a welder ?

All of the things that I can think of end up with the likely use of a welder to extend the stud so it can be worked out.

The working out portion may involve making a little puller tool.

Once the stud is out, the messed up threads /hole will end up with an insert.

I had a 2.7 mag case with basically every threaded hole fitted with an insert. It just got to the point where it made sense to do that ahead of assembly so I didn’t have the stress of worrying about a fastener making it to torque.


I’m curious what gets suggested and how you eventually solve this problem.

Originally Posted by john walker's workshop (Post 12550077)

Maybe the nut threads stripped and not the stud. Wrong nut anyways. Use a normal nut.

Originally Posted by David Inc. (Post 12550164)

I'm really curious about this one. I stripped one of these studs trying to use prevailing torque nuts as well because that's the nut that was on the block originally. I think it's also called for in the PET, but the crankcase page in the PET is confusing and boy does it ever not feel "right" putting that nut on at that torque.

To OsoMoore, I called Pelican to get the right stud and they gave me part number 99906207302, which is an M8x16. The PET calls out an M8x20, but best to check once you have the stud out. Yours looks like mine, though, where the threads don't stick out past the end of the nut.

Originally Posted by draw (Post 12146025)

I believe that most, if not all, of the studs in the case are DIN 835 standard. This means that the "tap" end is 2x the diameter of the stud. For example, an M8 stud has a tap end of 16mm. This is the end that is screwed in to the case. The other end is the nominal length of the stud.

http://forums.pelicanparts.com/uploa...1701816954.jpg

You can identify the stud from the parts catalog...

http://forums.pelicanparts.com/uploa...1701816954.jpg

Pos #4 on the parts diagram is an M8 x 35mm stud.

http://forums.pelicanparts.com/uploa...1701816954.jpg

So, the height of this stud in this position is 35mm.

Some words of caution...First, there are mistakes in the parts catalog, so be careful. Second, most of the studs you can buy are not DIN 835 and will not match exactly. Meaning, that the nominal length of a stud might be 35mm, but you may only be able to find it in 36mm. Third, a lot of these motors have been apart a few times by now and may not have the correct studs in them to use as a reference. I crosschecked all of mine against the parts catalog.

I measured and took pics of every stud in my case before I removed them. If you post a pic of the missing stud, and I might be able to help you.

Originally Posted by draw (Post 12550407)

According to the PET, the correct stud in that position is M8 x 20mm. Porsche followed the DIN 835 standard for the studs, so 20mm is the nominal length and the total length is 36mm. The part number 99906207302 is not correct. You can use part number 99906200603, but it is 1mm longer at 37mm. Belmetric carries the correct DIN 835 length stud if it matters.

See my post below for more information...