Fred Osborn wrote:

In the ID of my '87 13B rotors on the cooling pocket side there
is what I would describe as a small "tang", about 3/16" high. Can
anyone tell me its function? It looks to me like something that
might have been used in a manufacturing operation like providing
a fixed rotor index for spin balance purposes.

Are these on all rotor years? I'd like to remove it but can't
until I understand its function.

They all have that. I think it indexes the rotor in the automatic
machine tool that machines the rotor on the assemble line. If you
remove ti you will have to balance not only the rotor but the
balance weights.

Paul Lamar
 
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