# Flywheel reference pin

Nathan Winters natewin at yahoo.com
Fri Apr 24 12:35:08 PDT 2009

```Oops, that is the 60mm long pin.
20mm long is:  91595A167

----- Original Message ----
From: Nathan Winters <natewin at yahoo.com>
Cc: 200q20V mailing list <200q20v at audifans.com>
Sent: Friday, April 24, 2009 3:25:24 PM
Subject: Re: Flywheel reference pin

Got it, I think.

Description:  4H8x20

4 = diameter = 4mm
H8 = ISO mechanical tolerance, McMaster gives an actual diameter of 4.004-4.012mm
20 = length = 20mm

91595A192 = McMaster hardened steel pin

Nathan

----- Original Message ----
From: Bernie Benz <b.benz at charter.net>
To: Nathan Winters <natewin at yahoo.com>
Cc: 200q20V mailing list <200q20v at audifans.com>
Sent: Friday, April 24, 2009 2:20:59 PM
Subject: Re: Flywheel reference pin

I would guess the other way. 8 x 20 mm. The 4H may be a temper description?

Bernie

On Apr 24, 2009, at 10:57 AM, Nathan Winters wrote:

>
> 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.
>
>
> Nathan
>
>
>
>
>
>
> ----- Original Message ----
> From: Nathan Winters <natewin at yahoo.com>
> To: 200q20V mailing list <200q20v at audifans.com>
> 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.
>
> Thanks
>
> Nathan
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