Quote:
Originally Posted by Bob Kontak
What they used were meant to match the thermal expansion rates of the rest of the engine.
Dilivar were better at this but they can develop corrosion pits along the shaft and shear after many cycles.
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Sir Bobasaurous Sugar Scoops is correct, and strangely enough, Porsche never got the alloy, and how to preserve it (what coating to put on), figured out until the 993TT, "all thread" studs. Prior to those, even brand new ones were known to occasionally snap upon assembly.