1979-1993 & 94 Conv [Subscribe to Daily Digest] |
Hi Christian,
No worries, this repair really freaked me out since I broke a stud and had two other seized, so I want to make sure people have the benefit of my experience. Anyway, my understanding is that the middle three studs are short and the outer 4 are long. The long ones will be holding the manifold to exhaust ports 1 and 4 and the short ones hold exhaust ports 2 and 3. The way they work is this. All of the studs thread into the head the same amount, they just protrude out different amounts (save the spacers and sleeves!). Upon reassembly (use copper anti-seize!!) you thread the studs back into the head; there may be a special tool but I used two nuts jammed together to torque down the studs. Then you put the exhaust manifold back on and install the locknuts. Some people reuse the studs because they're a pain to take out, just replacing the locknuts. My feeling is that breaking a stud basically gives you a 100X more work, so it's worth getting 7 new studs from the dealer, using anti-seize and never having to worry again.
So the stud that broke for you is supposedly a real pain to get to, I'm not sure if you have room to stick a Dremel in there, much less center-punch it and get a straight, square hold into the middle of the stud. If it's not exposed, you're pretty much SOL and it's head-gasket time! If it's sticking out a bit, I advise heavy doses of PB Blaster and to work EXTREMELY slowly. WIth my two seized studs, I used the double-nut technique to be able to wrench them out. I spent an hour each after soaking them overnight. I wouldn't even try to turn the stud at first, trying to build up force to just barely budge it. Once it budged a bit, I'd spray and tighten back every so slightly to work the pentrant in. Then I repeated this for what seemed like forever, making tiny progress each time. I was eventually able to turn the studs freely and they came right out. Some people swear by heat as well, i.e., heating the stud cherry red, letting it cool and then taking it out. If you have a super-hot heat source then I suppose it doesn't hurt to try this.
If I'm not mistaken the copper gasket needs a resurfaced head? SD would know best though! Get the turbo to manifold gasket for sure though. Let us know how it goes! Best,
Ram
posted by 64.223.155...
No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.
 |
 |
 |
 |
 |
