Quote:
Originally Posted by javadog
The measurement is the runout on the perimeter of the flywheel. I don't know that Porsche intended it to be measure while installed on the engine.
JR
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How else would one measure runout if not mounted and rotated in an equivalent fashion? To confirm nothing is going on with the crank-to-flywheel mounting surface, measure that too - although finding an equivalent disk to replicate a mounted flywheel might be a challenge (e.g. new flywheel). However, even a used flywheel should be true if runout is measured on a non-friction, machined surface.
An automotive machine shop should have all the facilities to confirm a flywheel is okay/rebuildable. Even new parts could have manufacturing defects.
Sherwood