[Vwdiesel] Oil Breather kit ?

[Nate Wall]

Bentley referrs to it as a "pressure regulator" I fiddled w/ the one on the
Jetta many years ago and it in fact did act as a pressure regulator. I'm pretty
sure that its purpose is to prevent NEGATIVE crankcase pressure (or a vacuum).
The regulator basically restricts reverse flow at an increasing rate as vacuum
increases. I believe this to be when at high boost and light load operation.
The air flow past where the breather hose is connected to the intake boot
causes this pressure drop. The idea is to prevent dirt from migrating past the
engine seals due to negative pressure in the crancase. I think I read this
somewhere. What's odd, is that the vacuum created by the rush of air past the
breather opening would have to be greater than the crancase blowby to create a
negative crancase pressure! Now that does seem unlikely!

--Nate

"Gary, Orlando" wrote:

> I had mine apart one day 'cause I was curious.
>
> It definitely ain't no valve! It just had a few rigid baffles in it.
> Maybe being a Quantum, it was an oddball.
>
> -Gary, Orlando
>
> On Wed, 2003-01-22 at 12:44, LBaird119 at aol.com wrote:
> > > That's exactly what I'm talking about!
> > >
> > >  The reason I mentioned this is because the Bentley for my Quantum TD
> > >  described it as such... to slow down the velocity of the escaping oil
> > >  mist and allow droplets to settle out and fall back into the engine.
> > >
> > >  -Gary, Orlando
> >
> >   That device is a pressure thing.  It has a valve of some sort in it and
> > right
> > now I don't remember which way it works but it's to stop too much blowby
> > going through or such.  Velocity goes too high or the wrong way or such
> > and it closes off as I recall. Same thing as the Ford and GM diesels
> > have on them only they're a cad plated can.  Maybe VW's slows down
> > the oil migration as well?  <shrug>
> >      Loren
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