In Reply to: Do the short studs last better? (nm), AdamB [Profile/Gallery] , Mon, 24 Aug 2015 04:31:18

So Adam I'd say the short ones are what to put back in everywhere.

I too used a drill guide made out of a brass hose barb-to-MIPT plumbing fitting, fattened up by wrapping with tape. Wasn't perfect, and it's almost impossible to drill those holes straight up the middle of the hardened studs.

If you have many break you'll almost wish you'd pulled the head first.

For replacement studs I bought a pack of Dorman Help! kit 03411, 10 M8 exhaust studs and nuts made for a Ford product. Around $8 and locally in stock.

But DON'T USE the nuts it comes with unless you run a tap thru them first. They're crimped at the outside end for security, but they're crimped so much they dig into the threads of the studs and chew heck out of them.

They're better than the Saab studs because they're slightly longer and run deeper into the head, picking up some unused threads. They install with a 5MM socket if you can find one, no need to double nut them.

My first 9000 had several sheared studs and I just tapped the head, manifold in place, for the next-up SAE size, I think it was 3/8", and used hardened bolts and hardened washers there. Skipped helicoils altogether.

I read somewhere on Saabnet Saab's rationale for the longer studs and spacers but I think it's got a flaw in it, kind of a reverse of the "bumblebee can't fly" aeronautical theory. Saab thought they'd heat-stress less, I think they're actually heat-risers that bake and soak up MORE heat and stress the stud on every heat up-cool down cycle.

posted by 71.173.7...

• replacing turbo with manifold?, AdamB , Fri, 14 Aug 2015 16:51:10
  • Re: replacing turbo with manifold?, Craig , Mon, 17 Aug 2015 09:11:32
    • Re: Same here..., Street , Tue, 18 Aug 2015 02:17:52
      • Thanks, I'll try swapping the whole thing, AdamB , Wed, 19 Aug 2015 10:00:38
        • Re: Good luck!, Street , Sat, 22 Aug 2015 12:28:24
          • Thanks! I hope there aren't too many broken studs, AdamB , Sun, 23 Aug 2015 05:40:16
            • Re: Preparation is the key..., Street , Thu, 27 Aug 2015 11:07:11
          • Re: Good luck! Ha, ha, ha!, Bill Homer , Sat, 22 Aug 2015 15:48:11
            • Will have angle drill and helicoils on hand ;-) nm, AdamB , Sun, 23 Aug 2015 05:34:09
              • Suggest Cobalt Drill Bits, drill guide, plenty of lube, Bill Homer , Sun, 23 Aug 2015 11:39:59
                • Do the short studs last better? (nm), AdamB , Mon, 24 Aug 2015 04:31:18
                  • Short rarely seem to be broken, long ones often..., RayF, Mon, 24 Aug 2015 12:13:47 <-- Viewing This Message
  • Re: replacing turbo with manifold?, Simon S, Fri, 14 Aug 2015 20:01:18

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