[Vwdiesel] RE: vwdiesel digest, Vol 1 #77 - 1 msg

[David Kysar]

Loren,

I did replace the oil pump, this did't help, is the pressure relief valve in
the oil pump.
The only thing I have done that helped is replacing the vacuum pump.  I did
notice
a little play in the intermediate shaft.  If it was that bearing possibly
that caused
my vacuum pump reciever to wear?  Still doesn't explain the good oil
pressure
when cold?

Dave

Today's Topics:

   1. Re: oil pressure problems (LBaird119 at aol.com)

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Message: 1
From: LBaird119 at aol.com
Date: Mon, 1 Apr 2002 13:16:08 EST
Subject: Re: [Vwdiesel] oil pressure problems
To: vwdiesel at vwfans.com

In a message dated 3/31/2002 12:59:55 PM Pacific Standard Time,
kysard55 at suscom.net writes:

> I have about 3000 miles on a rebuilt 1.6NA.  Recently the oil light
started
>  flashing at idle.  I replaced the oil pump, vacuum pump, and senders.  I
>  also installed an oil pressure gauge.  When I am driving the pressure is
>  typically 15 - 24 psi, but averages about 17 psi.  Is this OK?  I have
tried
>  SAE 30 and 20w40 oil both give about the same pressure.  The first 5
minutes
>  till I warm up I have strong oil pressure (20 to 40 psi) but when the
temp
>  gauge climbs to about the halfway point to pressure goes down.  Should I
be
>  concerned?
>
  My Rabbit would drop to about 80+ psi when at a hot idle, with 15W/40.
I replaced the oil pump on the Jetta when it dropped below about 20 psi
@ 2000 rpm.  It maxed at about 40 psi.  Without a hydraulic head and/or
a turbo, I'd expect to see pressures around 80 psi.  Lower is fine but even
with a turbo you should see pretty consistent 40 psi readings at any engine
speed above an idle.
  Were the intermediate shaft bearings replaced?  :O  This is what's scary
about having these engines rebuilt.  Too many shops want to put more
clearance on the bearings and the bore than these engines are supposed
to have.  :(  When something like this happens you're then unsure whether
someone messed up, something's failed or if a bypass valve is stuck open.
Other than bad clearances, or bearings you could have a stuck open
pressure relief in the oil pump.
      Loren


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