[Vwdiesel] Vaccuum Pump Swap

gary gbangs at cfl.rr.com
Sun Sep 5 23:17:57 EDT 2004

I had an 1979 Rabbit with the 1.5L diesel. 

This was my first VW and needed a new thrust bearing. Since I had to
tear it apart anyway, I decided to replace all bearings and re-ring it.

When I asked the parts counter for an oil pump, he asked me whether or
not I had a vacuum pump or not. My car did not! It didn't have power
brakes. There was just a flat cover plate over the hole where one would
go. This was the only difference in oil pumps as I had found out. This
needed an oil pump with a gear on it.

Very strange.


On Sun, 2004-09-05 at 21:18, cass wrote:
> ignore me!!
> gary knows better..  :o)
> i just know on older ones..some oil pumps are
> different..
> and don't match up with some newer vac pumps..
> but it may be just the 'slot' thing..  :o)
> cassie.
> ~~~who spent the day re wiring all the p/o's  old
> wiring to aftermarket gauges..
>       i think he may have been insane!!..
>      however..now that ive re-wired them all..im
> sure if some one looks at what *i *did..
>       they will think me insane too!!  :oD
> ~~~~~~~~
> Pump Swap
> the diaphragm pump and the rotary pump,
> each take different oil pumps (which drives them')
> i do not know *what* the difference is..(lenght
> ,gear or slot?)
> but it is my understanding that you cant change em
> with out changing the pumps.
> i could be wrong. :o)
> ~~~~~~~~~~~~
> I just attempted to help an acquaintence swap her
> diaphragm vaccuum pump for
> a rotary style, as the diaphragm pump is not
> working.  Couldn't get the rotary
> one to seat properly.  Are they a direct swap?  I
> measured and the depth of
> the slot in the middle of the gear is a fair
> amount shallower than on the
> diaphragm version.  Was it bottoming out, or was I
> just not aligned properly?
> Andrew
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