[Vwdiesel] broke later style vacuum pump?

Andrew .Libby libbybapa at gmail.com
Sat Jun 12 10:53:50 PDT 2010

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


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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