Date: Fri, 4 Feb 2005 12:45:20 +1100
Reply-To: Ray Hunnam <rayjen@PNC.COM.AU>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Ray Hunnam <rayjen@PNC.COM.AU>
Subject: Re: wrist pins/boston bob
In-Reply-To: <BE26BBA5.7D10%camper@tactical-bus.info>
Content-Type: text/plain; charset="iso-8859-1"
Bob, Jim and Folks
Thats the strange part!!!!!
Apart from the pebble sound when backing off the accelorator I failed to
notice any other odd sound or any sudden rise in oil consumption. The
engine was performing ok no obvious loss of power , not that I drive over
the speed limit anyway.
I took it to my local VW Subaru Dealer. The Service Manager, whom I know
personally was puzzled. Their head mechanic, who is the father of a former
work collegue of mine was equally puzzled. He is a native of South America
and a qualified mechanic he was employed with VW on the Sth America assembly
plant prior to emergrating to Australia. Has been working on VW and
Vanagons at the dealers for at least 10 years not counting his time in Sth
Amer. When we pulled the motor they were amazed the only symptoms was the
rattle.
All this happened some years ago now and I posted this information then.
Ray.
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com]On Behalf
Of jimt
Sent: Thursday, 3 February 2005 11:17 AM
To: vanagon@GERRY.VANAGON.COM
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
Planned insanity is best.
Remember that sanity is optional.
http://www.tactical-bus.info (tech info)
http://www.westydriver.com
