I have the same on my '90 Westy. I think it comes from the crankcase breather tower
and/or the short hose leading from it to the air intake hose to be re-burnt. Check
that hose to see if it has not collapsed. If you look inside that air intake hose, you
will see a fine coat of oil.
That's my non-technical explanation :).

Jerry

----- Original Message -----
From: "David Clarkson" <dvdclarksn@AOL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Friday, July 21, 2006 1:04 PM
Subject: Strange oil deposit on s-tube from air filter box to intake

> My 1990 Westfalia has had a strange build up of what appears to be engine oil on the
s-shaped tube that goes from the air filter box to the intake. My first hunch was that
this may have been some of the seepage from the rear main which has a slight leak but
there is none on the top of the engine. The oil is on the tube all of the way around.
I have replaced the transmission and the inner and outer cv boots-nothing losing
fluid/grease here. Has anyone on the list had this odd symptom? Thanks.
>
> David Clarkson
> 90 Westfalia (230K)
> Dvdclarksn@aol.com
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