The clip failure would let the pin move sideways and eat a groove in the
cylinder so you would do have some oil control issues from that groove the
pin would make
more than some of the other possibilities
Bob
----- Original Message -----
From: "jimt" <camper@TACTICAL-BUS.INFO>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Wednesday, February 02, 2005 7:17 PM
Subject: Re: wrist pins/boston bob

On 2/2/05 2:14 PM, "Ray Hunnam" <rayjen@PNC.COM.AU> wrote:

> Greetings all
>
> I have been following this tread and would like to give you the benefit of
> my experience.  Firstly you all call them wrist pins we use the old term
> gudgeon pin and yes they do come loose.
>
> My 2.1 was suffering from a strange noise sounding like a hand full of
> small
> stones (pebbles ) being rattled around in a tin can.  Only happened on
> deceloration.  Took it to my local VW Dealer who stated I needed a
> rebuild.
>
> When I got the old parts back they showed me where the gudgeon pin had "
> Walked " and started to score the side of the liner barrel.  Reason given
> is
> because the gudgeon circlip had broken ??? allowing the pin to move.
> Gradually the hole elongated resulting in the bottom of the piston skirt
> smashing , hence the small pieces of metal in the bottom of the crank case
> sound like pebbles in the tin.
>
> The Dealer said he had never seen a circlip go before.
>
> Anyone interested I have some happy snaps of the damaged to the piston and
> gudgeon taken on my digital.  Unfortunately the shot of the liner with the
> score marks did not turn out.
>
> Regards
> Ray Hunnam
> Penrith Australia.

I have seen them fail on some built up type 1 engines I did, but what I was
wondering was how someone could tell the difference between the pin sliding
loose and other slap problems, at least until it went crash.

........................................
jimt
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Remember that sanity is optional.
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