Head stud repair

[Peter Crooks]

Hi all,
Great forum! Discovered a broken head stud in my 82 911SC during the PPI, made a deal with the owner based on the discovery and the car is mine. The car is great shape otherwise. I am debating to do the repair myself or turn over to the shop. Can any other readers share their experiences on this repair? I am new to Porsches, BMW motorbikes in the past! May possibly repair just the one stud, can the motor stay in the car during the replacment of the stud?
Thanks

[john walker's workshop]

engine comes out and apart. do all the lowers. too much chance that another will break and you will have to do it again.

[ubiquity0]

The engine needs to come out, and the top end torn down. As you're going in that far it would be crazy (IMO) to leave the other old studs in there. They're the same age & condition as the one that just broke!

Use steel headstuds (993?) not dilivar. They're something like $8 a piece.

[sammyg2]

I started that process last Friday. I bought 12 new 993 steel studs, I'll let you know how it goes.

[Peter Crooks]

Good luck Sam,
Look forward to seeing your updates... Are you doing one side only or both exhaust sides...

[CarreraS2]

I may be making this up, but wasn't there a guy here who managed to get a broken stud out without taking anything apart? Somehow managed to get a grip on the broken stud with the engine in the car, and backed it out.

Then he simply screwed a new one in!

I thought I remember reading that thread here a while back. Or maybe I'm thinking of something else.

[john walker's workshop]

yes there was. he was a very patient fellow. as i recall, he managed to get a grip on the stud with mini visegrips probably, and managed to extract 1 3/4" of thread 1/16 turn at a time. his obviously was already loose enough to move. most are not, and require heat.

[Groesbeck Hurricane]

JW is KING!!!

Plan on taking the motor out and replacing all the studs. Get the re-build book. If you are going to have the motor re-built, use a reputable shop.

[sammyg2]

I remember that thread. In fact I even looked at mine to see if it was possible to remove my broken stud with the engine together. No joy, it simply would not work in my case. The head of the case through bolt was in the way and I could not get a grip on it. I tried the hammer and punch trick but gave up quickly.

I plan to replace all dilivar studs (12 lower) with steel. I can imagine few things worse than replacing some of the studs and then having one I didn't replace break. While I'm in there (uh oh, famous last words) I'm going to fix everything that needs fixing, even if it requires replacing everything. Anyone have a credit card or three I can borrow?

[Doug Steinel]

Got the engine rebuild and ue the search button to get the thread where Mark Wemple just did this. I helped it and some of those studs were a real *****. I would leave the intake studs. Just get those dilavar exhaust studs out.