A 10 thou orifice in the extension, right at the engine case, would prevent
a catastrophic oil loss in the event that the flexible hose failed.  You
would have a mess, but you would not lose a significant percentage of the
system oil pressure.  It would read correctly, just a little slower as David
indicated.

Joe

----- Original Message -----
From: "David Beierl" <dbeierl@attglobal.net>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Monday, April 23, 2001 4:46 PM
Subject: Re: Vanagon oil light question for you - dissection of the light

 >
 > No, because the oil pump will just pump more oil until the line is
 > full.  Once it's full, i.e. at system pressure, the flow stops, but even
if
 > the line should start to leak the pump would still pressurize it until the
 > pump output balanced against the flow through the engine plus the
 > additional flow through the leak.
 >
 > Even if there were only a tiny pinhole-size bore in the tube it would
still
 > transmit pressure correctly -- unless the line actually became plugged
with
 > pipe tape or pipe compound or something else.   A very small bore would
 > make the gauge respond slower, but it would arrive eventually.
 >
 > david
 >
 > At 03:48 PM 4/23/2001, Brian Cochran wrote:
 > >That's just it.... I'm using the VDO 12" adapter.  But since the long
rubber
 > >hose runs as far as I could get it from the exhaust pipes, which isn't
far
 > >enough in my mind.  I am concerned that this is compromising the pressure
 > >put to the sender.  I'm not sure if that makes any sense, but I'm looking
 >
 > David Beierl - Providence, RI
 >   http://pws.prserv.net/synergy/Vanagon/
 > '84 Westy "Dutiful Passage"
 > '85 GL "Poor Relation"