The 1.8bar switch is used on non-hydraulic inline 4 engines. 1.8bar = 25.3
psi. The Vanagon engine when warm will not reliably and quickly reach this
pressure at 2500rpm. The 1.8bar switch will cause nuisance activation of the
buzzer. Especially after highway speeds. This switch is incorrectly called
for in the VW parts fiche. The .9 bar switch is the correct one. I wonder
haw many engines have been changed for know reason due to this error and
confusion. I know one person that the dealer changed his engine 3 times
before I set them straight.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com]On Behalf
Of Rico Sapolich
Sent: Friday, February 09, 2001 1:55 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: 0.9 bar or 1.8 bar Oil Press Switch Bullshit

In a message dated 2/9/01 11:02:04 AM, planetp@EARTHLING.NET writes:

<< You have two oil pressure senders, one is located above pushrod tubes on
left side of engine, underneath the tin (this is the 0.9 bar)...you can't
see it unless you remove tin on the engine's left bank (bottom), the second
sender is located in rear of engine behind and down from the crank pulley
next to water pump, hard to see - (this is the 1.8 bar). refer to the
Bentley manual if you have one or just go with the info here.
 >>

Jeff,

I would go with your information . . . if it were true.  The pressure switch
which is so well hidden under all that nasty engine tin has a setpoint of
0.3
bar.  Not only does the Bentley show this as such, but it has proven to be
the case with the several I have replaced.  The dymanic oil pressure switch
mounted near the base of the oil cooler, is noted as a 0.9 bar type in the
Bentley and the one I removed is rated at 0.9 bar.  My question is: Has the
0.9 bar oil pressure switch been superceded by one rated at1.8 bar for some
good reason?

Rich