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Re: 1998 4.3L V6 exhaust flange studs
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Originally Posted by ASJT3
heating the flange red-hot and using the stud extractor to remove the old studs did not go as planned. They were all extremely recalcitrant and did not want to come out, and I sure did not want to put too much torque and break them.
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Don't heat the manifold. Heat the studs. They need to glow orange or red, so a plain ol' propane torch is not likely hot enough.
AFTER they cool, they may thread out easily. Don't put torque on them while they're hot.
Quote:
Originally Posted by ASJT3
My problem is the threads on the studs are completely stripped for the last ½ inch where they engage with the nuts, but otherwise studs are in good condition...Has anyone ever tried a weld buildup on the degraded threads and then cutting new threads on the weld material (ground-down to match the shank diameter, of course)?
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Nearly impossible to "grind down" the shanks so that they're round again. And the welding will essentially heat-treat the metal. And then, you have to get the tap started so that when you've cut the threads on the welded section, you're aligned with the already-threaded part.
No, that's extremely unlikely to work out.
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