Date: Wed, 3 Dec 1997 19:42:28 -0500
Reply-To: Dennis Haynes <dhaynes57@EMAIL.MSN.COM>
Sender: Vanagon mailing list <Vanagon@Gerry.SDSC.EDU>
From: Dennis Haynes <dhaynes57@EMAIL.MSN.COM>
Subject: Re: oil pressure placement and clutch
That oil pressure of 25 psi at 2000 rpm is why you were having problems with
the oil pressure warning system. It was doing its job. The high pressure
sensor activates at 28 psi and if it is not made at 2500 rpm, the buzzer
will sound. As for the choice of gauge sender location, the high sensor is
before the filter, the low sensor is at the lowest pressure point at a
center cam bearing. Normally, the pressure difference should be minimal,
however, if the filter clogs, the location you are reading will show
improved pressure. As such, for all the people that claim that the VW
filter cures their buzzer problem as compared to the FRAM, they are actually
relying on the increased flow restriction of the VW filter to mask an
impending low pressure problem. Actually, the factory sensors are set a bit
close to what is actually needed. Typically, 10 psi oil pressure for each
1,000 rpm is considered normal for most engines. Needing 28 psi at 2500 rpm
is a bit over cautious. I've installed factory rebuilt engines that had
this low pressure problem.
As for a clutch, Ron's clutch kits are as he claims and I have not found
better pricing anywhere. I wonder how he makes his deals.
Dennis
-----Original Message-----
From: Mark Schrope <mschrope@VIMS.EDU>
To: Vanagon@GERRY.SDSC.EDU <Vanagon@GERRY.SDSC.EDU>
Date: Tuesday, December 02, 1997 11:27 AM
Subject: oil pressure placement and clutch
>Before I found this list and its wealth of information I dealt with the
>oil pressure light problem on my 89 wolfsburg. The mechanic working on
>it wasn't overly familiar with Vanagons and so was stumped after
>replacing the sending unit in question and the buzz/ light didn't go
>away. We decided to disable the thing and he installed a VDO pressure
>guage but rather than putting it under the 3/4 tin he put it in at the
>higher sending unit hole and the hose bends under the belts making the
>VDO sending unit easily accesible. My question is, am I getting an
>accurate enough reading from this location (it reads about 25 at 2000rpm
>when engine is warmed up rather than the recommended 29. I have 20W-50
>oil and a German filter) or should I consider going through the trouble
>of moving it to the location everyone else seems to use?
>
>Also, I've considered upgrading to the unit with the dual sender. The
>old warning light setup is pretty much beyond use at this point so I was
>wondering if it is possible to just wire a small light off the sending
>unit to use as an idiot light. Any advice or if anyone has done this
>I'd love to hear from you.
>
>Last question- I unfortunately find myself in need of a new clutch. I
>was looking through the archives and found posts from earlier this year
>dealing with problems experienced after installing Sachs clutches. Ron
>at the Bus Depot said he hasn't been having any returns so I assume the
>problems have been dealt with. Anyone had any problems recently? I
>found a post with some detailed instructions on replacing the clutch and
>pilot bearing but I'll be having the work done by a non-VW mechanic so
>any additional tips would be much appreciated. Thanks for the help
>
>Mark Schrope
>'89 Wolfsburg
>
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