[Vwdiesel] more vacuum pump

[Andrew .Libby]

You probably didn't mess anything up.  It's probably just that your engine
bearings are pretty well worn out and the change of the pump was enough to
cause the oil pressure to drop below where the light turns on.  I'm not
totally certain, but I believe that the rotary pump consumes more oil
pressure.  With the rotary pump, the oil passes up through the center shaft
and spill out over the vanes.

I would put an oil pressure gauge on it and find out what the pressure
actually is.


On Sat, Dec 15, 2012 at 2:23 PM, Scott Alexander <salex at dsl.cis.upenn.edu>wrote:

> So I got a rotary pump.  It came with some directions that seem to have
> been translated poorly talking about an oil feed.  In the hopes that it all
> came down to "make sure that the tab inside the block fits into the slot
> inside the pump", I assembled it all.  I blocked off the hose from the
> crankcase to the old pump by shoving a bolt in the hose and tightening down
> the hose clamp.  Otherwise, I assembled it as I would the old pump.  When
> completed, I took a quick spin around the parking lot.  The good part is
> that I now have assist on the brakes again.
>
> The bad part is that, after a short time, the oil light comes on.
>  Normally, it comes on with the alternator light when I turn the key to
> "on".  They both remain on until the alternator starts producing a
> reasonable voltage and they both go off.  That is still happening.  It's
> just that a short time later the oil light comes back on.
>
> Any ideas as to what I messed up this time?
>
> Thanks,
> Scott Alexander
> '82 Rabbit Diesel
>
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