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PCA Member since 1988
Join Date: Feb 2018
Location: SW Washington State
Posts: 4,638
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My view as a mechanical engineer: If the studs are original Porsche steel, and they do not have significant corrosion, keep them as-is, and don't remove them. If significant rust, you and your machinist decide whether to replace. If the case needs the cylinder spigots machined, then you have to remove them.
What does he want to replace them with--Porsche steel studs? Either way paint them with a good paint to protect against future corrosion.
Caveats: This is for a street car with a 3.0 or 3.2 case, not a racing engine. There aren't other factors mitigating to replace them.
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1973.5 911T with RoW 1980 SC CIS stroked to 3.2, 10:1 Mahle Sport p/c's, TBC exhaust ports, M1 cams, SSI's. RSR bushings & adj spring plates, Koni Sports, 21/26mm T-bars, stock swaybars, 16x7 Fuchs w Michelin Pilot Sport A/S 3+, 205/55-16 at all 4 corners.
Cars are for driving. If you want art, get something you can hang on the wall!
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