Wastegate to crossover pipe studs, replaceable?

[chrenan]

Well, one of the studs on my wastegate snapped while removing the crossover pipe. I even let them soak with penetrant for a week. Is the stud replaceable or is it cast into he wastegate housing?

[legion]

Looking at the picture on the PET, it looks like it is part of the wastegate.

You could order a new wastegate, (I've always had my eye on the ones from Lindsey Racing), or you could try to install a helicoil.

https://techinfo.porsche.com/techinfo/pdf/en/catalogues/E_944_88_KATALOG.pdf

[nize]

hey chrenan, those studs are removable, but it's not easy to do. you're probably better off taking the whole wastegate in to a machine shop and have them remove it.

alternately, you might want to buy a better wastegate. now would be a good time for a tial.

if you want to go the medium/cheap route, i can sell you my old (stock) wastegate, though you'd probably save money just by having a machine shop remove the broken stud locally.

[chrenan]

Thanks guys. I'll take a try at removing it in place. If I have to pull it out, I'm the type of guy who'll replace it with new. Then I'll be back with more questions...

[chrenan]

Success! Took some soaking with penetrant and plenty of elbow grease but it came out. I replaced it with a 924 exhause manifold stud, slightly longer but a very close match.

Moved on to dropping the cross member this afternoon, all went smoothly, next I'll drop the oil pan and replace the gasket then start the process of re-assembly...

[legion]

AWESOME!!!

It's always nice when you can fix something yourself that you thought would be expensive.

It's also nice when you find a use for a part you just had laying around.

Nice job!

[chrenan]

I agree! Thanks for all the tips guys, much appreciated. I'm liking this 951 section of Pelican, a little quieter than Rennlist (in a good way), reminds me of 924Board.org. I'll post up a few pics tommorow of where I'm at with my work on the 951.

[nize]

chrenan; how did you get it out? it seemed too short to double-nut it. do you have a bolt extractor?

also, you might want to be careful about using other bolts/parts on the 951. i'd make sure the bolt metal was the same grade/rating as the 951. all bolts are not created equal and i'd hate to see you break another bolt in the same location.

what penetrant did you use? have you tried pb-blaster?

[chrenan]

You are right, definitely too short to double nut. I soaked it with Liquid Wrench (by Gunk) overnight, then hit it with a round of WD-40 in the morning. In the afternoon I went out and had a go at it with some vice grips, after a little back and forth movement it broke free and came out smoothly.

I have tried PB blaster in the past, had good results sometimes and other times not. Seems to be no logic to stuck bolts sometimes. One of my favorite techniques and one that I would have tried next if the above didn't work is the candle wax method. You heat the bolt and surrounding area red hot, then rub a candle (unscented) around the bolt. The wax will melt to liquid on contact and run everywhere, including into the seated threads of the stuck bolt. An old hot rodder showed me that trick and it is pretty effective.

Never thought about the grade of the manifold bolt I substituted, just figured an exhaust stud is an exhaust stud. Luckily I've still got time to track down a suitable replacement, my projects are never really completed quickly.

[CurtP]

Originally Posted by chrenan

One of my favorite techniques and one that I would have tried next if the above didn't work is the candle wax method. You heat the bolt and surrounding area red hot, then rub a candle (unscented) around the bolt. The wax will melt to liquid on contact and run everywhere, including into the seated threads of the stuck bolt. An old hot rodder showed me that trick and it is pretty effective.

It's the heat, not the wax that does the trick