3.2L case perimeter studs- cannot find a source

[85RedCarrera]

After much searching (Porsche OEM, McMaster-Carr, internet, all other vendors) I cannot find a source for the M8 studs around the perimeter of my 3.2 case.

Our host says not available, and McMaster and others do not have studs that match the original dimensions- what are you guys using for replacement studs?

If I am reading the Porsche Catalogue correctly,

these are "M8 x 32" PN 999 062 115 02.

Not sure what the 32 is referring to- no part (or any combination) of the stud dimensions equals 32mm.

My Measurements:

short threaded end: 16.5mm
Long threaded end: 23.5mm
unthreaded shank: 8.5mm

Overall length: approx 48.5mm

(Some of my studs have enough corrosion that I would rather not clean them up and re-plate)

Any help appreciated!

Thanks,
Dave

[mepstein]

My go-to is usually stoddard or belmetric. I’ve ordered a lot of stuffs lately from stoddard and they have about 75% of what I need. Not great but it’s better than nothing.

[gled49]

Porsche use to identify stud length by what’s showing, so the part threaded in to the case is not counted. Don’t know it it’s still that way.

[john walker's workshop]

Global Metrics is a good source.

[draw]

See below for info on studs. Bel metric is a good source for DIN 835 studs. I’ve also been able to source studs from our host and rosepassion.com.

Originally Posted by draw

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.



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



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



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.

[85RedCarrera]

Thank you! I had tried Bellmetric before I posted this thread, but apparently I didn’t select all of the correct variables - I went back with the measurements that draw provided, and there were the studs- for $1.70 in yellow cad.

Rose passion is a nice site too- it’s too bad they are across the ocean from me.

Describing a stud according to it’s Installed height is something I haven’t seen before.

Global Metrics doesn’t appear to have a website, but I can call them.

[dannobee]

Rose passion will get parts to you just as fast as states based companies. I use DHL for shipping.