At 10:14 AM 10/1/2002, Ben McCafferty wrote:
>OK, Bentley says the low pressure switch (between cyl 3 and 4) is .3 bar, or
>4.4 psi.  The high pressure switch (near the oil pump) is .9 bar, or 13.1
>psi.  This is all on page 17.7.  If that's true, my situation of 20 psi at
>2000 rpm still satisfies both pressure requirements, either just above or
>just below the magic 2000 rpm.

I believe there are some 1.8 bar switches out there, and my understanding
FWIW is that VW abandoned them because of too many "nuisance alarms" -- or
cynically translated out of marketspeak they decided that customer
complaints were more important than engine protection in the great scheme
of things.

>However, on page 17.9, in the test procedure for the oil pressure switch,
>the manual says "at 2000 rpm, pressure should be minimum 2.0 bar (29 psi)".

So it should, especially if the alarm is going to go off at 1.8... <g>

>So I still feel like I'm missing something.  If the requirement is 29psi,
>then my oil pressure switch should be setting off the light/buzzer a LOT
>earlier, because it doesn't do anything until 20 psi, and rarely at that.
>
>If the requirement is 4.4 or 13.1 psi, there's a ghost in the machine,
>because the engine never runs below 20 psi at 2000 rpm, and usually higher
>than that.

Your ghost will no doubt be screwed into a hole near the oil pump.  Try
replacing it.

david

--
David Beierl - Providence, RI
  http://pws.prserv.net/synergy/Vanagon/
'84 Westy "Dutiful Passage"
'85 GL "Poor Relation"