Parts needed fast

[Kneale Brownson]

The rollpins  http://www.pbase.com/kneale_brownson/image/67353148
reportedly are a fixture that Audi uses at the factory for some initial
engine setup.  The three much shorter dowels (one half hidden by one of the
rollpins) are for orienting the pressure plate.  The timing pin is on the
other side of the flywheel.  When I asked about the rollpins earlier
because the shop that resurfaced the flywheel for me broke one of them
while preparing for the resurfacing, several folks here advised that they
are not necessary to engine operation  and I need not worry about any
differences.  The two sensors are mounted such that they can't see those
pins anyway.  One reads the single pin on the other side of the flywheel
and the other counts the starter ring teeth, as I understand their
operation.   Bentley's description of 3B pin length and placement (Pgs.
13.34-13.35) says the single pin on the engine side of the flywheel goes in
"flush", which I presume means the nonprojecting end is flush with the
bottom of its hole in the flywheel, and then provides a measurement for
placement of the sensor.  There's not a figure for just how far the timing
pin should project from the flywheel surface.  Bentley says the rollpins
are used for some sort of engine testing, and does provide a length for
them.  Bentley does provide a timing pin length (11.8 + or- 0.1 mm) in its
MC flywheel data (Pg 13.13).  Don't know whether that would apply to the 3B
too, but the sensor placement measurements are the same.


At 08:18 PM 10/19/2006 -0600, DeWitt Harrison wrote:
>When I did an MC to 3B flywheel conversion a while back,
>it was my impression that the pins are actually roll pins
>tapped into holes in the flywheel. The pins on the 3B
>part where much longer to make up for the lack of
>the extra metal at the outer radius. I would think it
>possible to find such pins at a general machine shop
>supply house. Measure the distances from flywheel
>to sensors to get the required lengths. Account for the
>mounting hole depths.
>
>I may be able to look up the actual pin lengths in a
>Bentley if needed. The family album looks a little confused
>as it calls out these pins for the 3B flywheel.