Sounds like gear grinding. Water pump is ok (pulled off belt...noise still
there).  Checked around with a long screwdriver as a scope, noise is loudest
on coolant transfer pipe (from right cyl head to pump) but I think this is
acting as a noise amplifier....not the source.  Also checked oil pump,
pulley, a/c etc to no avail.  I hate to say it but it sounds internal.  No
loss of power, engine runs great and no leaks.
Still baffled in La Quinta
Karl Batzler
84 Vanagon
192,000 mi. +
-----Original Message-----
From: Ari Ollikainen <Ari@OLTECO.com>
To: KBatzler <KBatzler@EMAIL.MSN.COM>
Date: Wednesday, November 11, 1998 9:42 PM
Subject: Re:

>>Howdy Listees,
>>I've got a small problem that I'm hoping that someone can help me with.
>>When engine is running, I hear a rattling noise though the case.  My
>>mechanic thinks that the TDC sensor has worked loose and is rubbing on the
>>flywheel.  Has anyone heard of this?  Your thoughts appreciated.
>>TIA
>
>        That sound might be the water pump bearing...sounds like gravel
>        rattling in a drum at low RPM?
>
>
>
>      OLTECO                    Ari Ollikainen
>      P.O. BOX 3688             Networking Technology and Architecture
>      Stanford, CA              Ari@OLTECO.com
>      94309-3688                415.517.3519
>
>