I can speak only of the air-cooled, but would surmise that the waterbox
is the same.

If all of your FI stuff is intact and in stock condition, the motor will
not run with the oil filler cover removed. It will run horribly with a
hole in the cover, with varying severity of performance degrade based on
the size of the hole.

A hole there negates the crankcase vacuum created by the PCV valve,
allowing a relatively free-flow of unmetered air to bypass the air flow
meter, leaning the mixture, and introducing a large measure of crankcase
gasses to the intake stream. Comprende?

From historic, walkable Mount Olive, NC,

G. Matthew Bulley
Bulley-Hewlett
Corporate Communications
Business: www.bulley-hewlett.com
Alliance: www.ntara.com
Home: www.MountOliveNC.info

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM] On Behalf
Of Chad G
Sent: Tuesday, February 05, 2002 1:08 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Oil Filler Tube Question

Is it true that a hole in the oil filler tube will cause the engine to
poorly?? Is it like some sort of vacuum leak??