Just keep in mind that this adapter is placing the pressure switch before
the filter, close to the pump outlet. The highest pressure point in the
system. The original sensor is located at the center cam bearing, a very low
pressure point after all the losses including the filter. Since the filter
can have a normal drop of 2-3 psi or worse the bypass needs 6-8 psi
differential, the switch at this point will only tell you that 3 psi oil
pressure is getting to the filter, not actually flowing to the bearings.
This is why the later engines use the dynamic oil pressure system with 2
switches. One good use of this device would be to install an oil temperature
sensor. Then you can get actual oil temp readings from oil that is flowing.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Roger Sisler
Sent: Wednesday, October 11, 2006 3:16 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: oil pressure problems,still

Thanks Dennis,but this is an apples-oranges comparison. I routinely change
tires.Infact I had 14 flats in 40K miles.Didnt break a single stud or
wheel. One flat had the head of a 7/16 inch bolt on the inside of the
tire,instead of the usual pointed end!!!! Now how did that happen?? Had a
gas station fix it. They couldnt figure why the object wouldnt come
out.They removed the tire from the wheel,and there was the head on the
inside.Explanations?I will change some more flat tires in the near future,I
am sure.I still drive.
 Not gonna touch that switch.Dont have to,so why do it with such
interesting luck?What I am going to do is buy this Ebay item
320035643961.It is a sandwitch plate that fits where the oil filter goes.A
oil filter then fastens to it.No hoses or pipes. Several take off points
are in the plate  for oil pressure switches and such.Very interesting  and
useful to Vanagon owners with good pressure switches.I have heard on this
list of a need for this item,many times.Nobody had knowledge of it.Check it
out. Good for a gauge and oil light and even more.

Roger