Flywheel reference pin

Nathan Winters natewin at
Fri Apr 24 10:57:30 PDT 2009

Partial answer to my question:

I Found the part number for it and description:  p/n: N 902-318-01 dowel pin 4H8x20

Is that 4mm diameter x 20mm long?  Not sure what the 8H stands for.


----- Original Message ----
From: Nathan Winters <natewin at>
To: 200q20V mailing list <200q20v at>
Sent: Friday, April 24, 2009 1:46:15 PM
Subject: Flywheel reference pin

Could anyone here tell me the diameter and length of the flywheel reference pin?  
SJM indicates a measurement that it should stick out about .475" / 12mm from the plate but I does not provide a length or diameter.
This is the pin on  the engine side of the flywheel, the one used to figure out TDC I think.


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