2L oil pump dilemma

[yurple at hotmail.com (Mark Malowicki)]

  Looking at the little schematic in the Bentley of the lubrication system, 
it shows a pressure relief valve just after the oil pump, and before the oil 
filter.  Does anyone know how this valve works?  If it works as a pressure 
regulating valve (continually peeing out oil to maintain oil pressure below 
a set upper limit), and it's stuck / blocked, Could that be your probllem?

  Then again, it may only be there to open up in case of severe 
overpressurization.

  No idea if that helps any, it was just a thought.

                         - Mark M



>Date: Mon, 15 May 2006 12:13:27 -0400
>From: "Phil Boeye" <roccophil@gmail.com>
>Subject: 2L oil pump dilemma
>To: "Scirocco List" <scirocco-l@scirocco.org>
>Message-ID:
>	<9c2f127e0605150913p29eb2cc5iaaecfacddf235624@mail.gmail.com>
>Content-Type: text/plain; charset=UTF-8; format=flowed
>
>Engine: 3A block w. JH head (1.8L solid lifter)
>
>Problem: oil pressure too high (by VDO metric gauge)
>
>Actions:
>
>* replaced the OEM 2L pump (36mm gears) with a different 2L pump that had
>30mm gears
>* oil pressure became even HIGHER and now sets off oil pressure warning
>* original pump had 25k on it and was in visually great condition (no
>scoring, smooth operation by hand turning - didn't check play)
>
>Now I am concerned.  I was told to install a 1.8L hydraulic oil pump (which
>I have since bought).  I had been sent the 2L 30mm pump erroneously some
>time ago, so since the 1.8L pump also has 30mm gears, I thought "what is 
>the
>difference?".  Apparently there *is* one, I just don't understand it at 
>all.
>
>So I won't swap out the pump until I yank the engine (I think one of the
>interior bolts between tranny and pan got crossthreaded - yeah), and this
>isn't a regular driver at all.  Now just a 'move it from one spot to
>another' kind of car until the fall.  A shame, because this was the one I
>drove when I wanted to put my foot in it.
>
>But this really pisses me off.  I cannot tell what the problem is at all 
>and
>would appreciate anyone's input on the situation.
>
>------------------------------