exhaust stud torque #'s

I need some torque settings if anyone has them. Torque for stud into block, for nuts onto the studs, and torque for SSI to muffler bolts.
Also,, I had 2 studs back out while removing, Where can replacments be purchased.
Thanks


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85 Carrera Targa

sorry,, I replied to this to move it to the top. Can anyone help? Maybe the info is in their Bently, or do I need to worry about the torque for this.

From Bentley:
Exhaust runner to Cylinder head: 18 ft lb.
Muffler to Cat: 18 ft lb
Strap: 30 ft lb

No info on tighting stud into head..I would think you would run it in snugly, then torque the nut. Good luck.

Jim,

Well, the factory spec book and service manuals are a little 'sparse' when it comes to replacement stud torque values, so I will tell you what I do ... using clean, dry stud into aluminum threaded hole that has had a tap run into the hole to 'clean up' the threads ... I use the 'double-nut' technique on the stud, that is, two clean, new, dry nuts that are tightened together with two box-end wrenches until 'snug' ... then, the outer nut is used to drive the stud into the head until the nuts start to slip on the stud. I leave a box end wrench 'dangling' inside the inner nut while the stud is being installed, preferring not to be forced to use an open-end wrench for removing the nuts after the stud is installed!

As far as a replacement stud ... you can purchase/order them from a dealer, or Pelican, or you can cut a 'custom' replacement from M8 all-thread rod which is available from any well-stocked industrial bolt supply house. Personally, I keep a 316 Stainless-Steel M8 all-thread rod on hand for use on such repairs, and have used it for Porsche and VW cylinder head stud repairs ... no problems. For a torque value on regular steel nuts I use 15 lb-ft with plenty of anti-seize compound, but the SSIs come with brass nuts, right? Bruce Anderson recommends 15-17 lb-ft on heat exchanger-to-head nuts, and no note about anti-seize.
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Warren Hall
1973 911S Targa

[This message has been edited by Early_S_Man (edited 01-22-2001).]