Its an indexing pin and was added after so many wrenches went nuts trying to assemble the crank and crank pulley without indexing only to find out that the 8 holes are NOT symmetrically spaced on the crank flange. Early flanges, dampeners and pulleys dont have a pin or an index pin- later ones do.
Thanks for the swift reply. So it is simply a visual marker? I am asking because I am doing an EFI retrofit and need to add 3 Hall sensor protrusions to the rim of the balancer.
Well - what a mess....
I assumed foolishly you were referring to the ninth hole on the dampener.
My apology.
The pin you refer to is a signal to the early diagnostic system for TDC.
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