JH Engine oil pressure issues

[treed2 at u.washington.edu (T. Reed)]

William,

Have you thought about the various valves in the lubrication system (such
as the anti-backflow and bypass valves built-in to the oil filter.. You
ARE using a mann/mahle/bosch/vw oil filter, right??)

Maybe one of them is stuck or sth along that line?

-Toby

On Sun, 28 Sep 2003, calimus wrote:

> This is a bit OT as it's for the wifes cabby, but hey, it could be a
> scirocco if you use your imagination.
>
> Ok, a week or so I posted a similair question, but now I'm in the thick of
> things and doen't like what I see.  Both the cars internal gages and a
> manual oil pressure gage tell me that after about 15-20min the oil pressure
> in the head at idle drops to just below 0.5bar on the vdo gage and on the
> manual gage it's so close to 0 I really wouldn't know what to call it.  Now
> this is after bumping the oil up to 20w-50 since the PO's had 10w-30 in it
> before.  I also flushed the motor twice to make sure all the gunk would be
> out of it.
>
> So I figured that it might be the pump (which documentation shows was
> replaced in 97' and only 7k miles put on the car since then, but since they
> had it done at a shope I was wondering if it had really been done) so I tore
> the pump out of our wrecked cabby since i knew it was good, then dropped the
> pan on the new cabby and there sites a bright shiny brand new'sh febi oil
> pump.  Now I'm conserned since the pump looks like it was just put in
> yesterday, could it really be bad?  If figure I'll go ahead and swap the
> pumps and see what happens, but I need to know where else I could develope
> an oil pressure problem in the head after about 15-20min of good 3bar
> pressure.  Now the pressure doesn't fall like a rock, but after about 10min
> is starts to drop down as the oil temps reach about 80c.  I'm kinda at a
> loss since on cold start pressure is good then falls off.  So if you
> guy's/gals can hit me back with things that I can check to try and figure
> this out, I would be very gratefull.
>
> Thanks,
> William Snyder
>
> 88' Scirocco 16v
> 89' Cabriolet 8v (R.I.P.)
> 71' Karmann Ghia
>
>
>
> _______________________________________________
> Scirocco-l mailing list
> Scirocco-l@scirocco.org
> http://neubayern.net/mailman/listinfo/scirocco-l
>