[Vwdiesel] broke later style vacuum pump?

Will Taygan william at taygan.com
Sat Jun 12 13:35:36 PDT 2010

I assume to see the oil flowing out the center I've got to take the top
plate off?  I'm just looking through the broken nipple - had it stuck on
with silicone, which made it easy to remove :).

Will pull it in the next day or so, check and clean.  Gotta take the
kids to the fair today with the newly-running 91 ecodiesel :) 


Will in Alaska.

On Sat, 2010-06-12 at 10:53 -0700, Andrew .Libby wrote:
> Any issue with the oil supply to the later style plump will cause it to
> produce almost no vacuum and is the only issue (other than busting the
> nipple) I've ever personally had with the rotary style.  If you are not
> seeing pressurized oil flowing out from the center of the pump I would
> assume it is an oil supply issue.  I have a pump here that had a busted
> nipple.  I purchased a brass check valve from mcmaster and installed it, but

> haven't gotten to installing it to test it.  Should be a cheap and permanent
> solution/improvement.
> Andrew
> On Sat, Jun 12, 2010 at 9:51 AM, <LBaird119 at aol.com> wrote:
> > In a message dated 6/11/2010 10:01:29 PM Pacific Daylight Time,
> > william at taygan.com writes:
> >
> > > Unfortunately(?) I've got the later style pump.  I pulled the nipple
> > > (loose fitting anyway) and can see the vanes turning, but no suction
> > > when I put my finger over the hole.  I put a little oil in there, but no
> > > go.  Rebuildable?  I've got some old-style pumps I could stick a new
> > > diaphragm in, but would like to get this one going.
> > >
> >
> >  Vanes could've gotten rusted in place.  They're synthetic but
> > the rotor's metal.  The other option, or combination of problems,
> > could be the rotor is worn.  If there's much gap between the top
> > of the rotor and the top of the case, you have to mill down the
> > case to a few thou clearance.  Mine had the worn rotor issue when
> > I got it.  I only had the capability to file it down at the time.
> >     Loren
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