How do you replace the rear wheel studs on an 81 928?
 

I'm sure that this topic has been addressed in the forums before, but I didn't see it when I tried multiple different searches.

I have a dinged up rear wheel stud on an '81 928 (long story.) These are the stock 50mm studs. Tapped out the bad one with a hammer, but there is not room enough behind the wheel hub to actually remove the stud. So now, my car is on a jack-stand with one loose stud.

I know that I could cut the old one out, but that won't help me get the new one in.

I'm guessing that either I am overlooking the obvious, or the wheel hub will need to be removed to replace the stud.

The manual's depiction of removing the wheel hub is a task that I am just not willing to attempt. If it comes to that, I will get a die and chase the existing stud to clean it up.

Any suggestions? Am I overlooking the obvious here?

not overlooking the obvious but the hub must be removed for extration of those long studs.

You should be able to get that stud back in and recut the threads.

It can be done...you have to rotate the hub as you remove the stud. I drilled on out one time on my 81 (lug nut sheared off down on the wheel) and they told me the new one would never go in without pulling the hub, but it did...you simply simultaneously rotate the hub and angle the stud in from the back side and it should drop right into the hole. Drawing it up is another hassle, but can also be done on the car. I'm amazed you could hammer the old on out.

maybe, John, he's got a bigger hammer than you.......;)

--Russ

Thanks for your comments!
 

I worked with rotating the hub idea a bit and even tried to leverage the hole that the emergency brake linkage comes through, but no joy. I have a die on order, but a steel hardware store nut has already done an acceptable job of cleaning up most of the threads.

BTW: I used a 5lb sledge. I really didn't have to hit the lug hard - I held the sledge head in my hand and gave it about 3 solid raps when it started to move.

This is something that I have had to do in the past on a different brand car that had soft lugs (broken by a tire shop) - I had no idea that my first Porsche would be such a challenge in this area!

I'm 1/2 Italian, there's nothing wrong with my hammer.