Reply to "Dreaded distributor Pin"

4vandproudMember

I've never seen the OPDS (oil pump drive shaft) fail?

seen one wind up like a pretzel, must've had 20 twists in it but it didn't break. if the stock OPDS has the capability to do that, why do we need a stronger one?

the pin is the weak link, and the OP says his was doubled

unfortunately, aftermarket dizzies are being produced with the gear set too low on the shaft. there's no shaft free play clearance when the hold down is snugged down, causing excessive drag at the bottom of the dizzy gear and the block ledge

more unfortunately, this situation destroys the drive gear on the camshaft. you may need a dental mirror & a light to see the damage on the underside of the teeth down in the dizzy hole

found it, almost 1/2 way down here,
http://twiddler.typepad.com/cobra_lads/page/6/

that was an MSD, mine was a Mallory, & this is not the first Pertronics post I've seen. i'll put $2 on this as the cause of the OP's pin breakage

1/21/1412:54 AM

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