[Vwdiesel] PCV vents

[Shawn Wright]

Brian,

Thanks for the info. The VC is pretty clean I think - soaked in solvent when 
engine was rebuilt 3k ago. It also has the Jetta TD plastic separator sitting 
on top of the VC (it is a complete Jetta TD engine). I will check the VC 
screen next time I have it off just to be sure. I notice that when removing the 
PCV hose after a hot run, there is visible oil vapour coming out of the hose. I 
am running on a rebuild with cylinders that were at or near the wear limit, 
just honed and new rings, plus running 15psi boost, so expect this doesn't 
help...

On 22 May 2006 at 21:05, B & R Decker <bdecker001 at centurytel.net> wrote:

> 
> 
> I don't know what kind of an oil separator is on a Westy td. On an N/A 1600 cc
> diesel in a Rabbit pickup the oil separator is in the valve cover. If that
> becomes clogged you will experience oil blow by. It is very resistant to
> cleaning. Our usual way is to either soak the valve cover immersed in carb
> cleaner ( very caustic ) or sent it to a radiator shop to be hot tanked. The
> plastic cam cover in later gas engines is also a help. I would suspect your oil
> separator has too much gunk in it. Brian Decker
> 
> -----Original Message-----
> From: vwdiesel-bounces at vwfans.com [mailto:vwdiesel-bounces at vwfans.com] On
> Behalf Of Shawn Wright
> Sent: Monday, May 22, 2006 10:05 AM
> To: vwdiesel at vwfans.com
> Cc: diesel-Vanagon at yahoogroups.com
> Subject: Re: [Vwdiesel] PCV vents
> 
> On 21 May 2006 at 12:46, Shawn Wright <swright at zuiko.sls.bc.ca> wrote:
> 
> > Today I got around to installing a 2nd PCV vent in the old mech fuel pump
> > location, and ran the hoses similar to Andrew's setup in his Vanagon. I
> came off
> > the valve cover with a 90, then down to T just above the block off plate
> (with a
> > 1/2" fitting welded on). The top of the T has the oil separator that
> normally
> > sits on the valve cover on the TD. The line from the VC goes to the side
> of the
> > T, the bottom of the T goes to the block. The outlet of the oil separator
> goes
> > back up to the intake, in this case a modifed Dodge Caravan airbox. I'm
> hoping
> > this will fix the problem of oil accumulation on the vent hose. I noticed
> one
> > thing I didn't expect - there seems to be a slight vacuum from the block
> vent,
> > and the usual blowby from the VC vent. I expected some output from the
> block,
> > which would reduce the amount from the VC a little.
> 
> Well, after only about 1 hr of easy driving, this new PCV plumbing appears
> to be a dismal 
> failure. :-(
> The hose leading to the intake had at least a tablespoon of oil pooled in
> the low section, 
> much worse than before when the hose went straight off the valve cover. It
> appears my 
> rebuild is suffering much greater blowby than I'd hoped - either the rings
> didn't seat well, or 
> the bores were just too far gone. In any case, I have no intention of
> tearing it down again, 
> since it runs well, and doesn't smoke. I just want to minimize the amount of oil
> entering the intake. The main problem is the point where it enters the intake is
> below the output of the PCV oil separator, so oil is pooling in the hose, and I
> get a big cloud of blue smoke when leaving the driveway. Has anyone tried using
> an oil separator bottle?
> 
> 
> Shawn Wright
> http://members.shaw.ca/vwdiesels
> '88 Westy 1.6TD 5 speed
> '85 Jetta Diesel 1.6NA
> 
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> 
> 
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Shawn Wright
http://members.shaw.ca/vwdiesels
'88 Westy 1.6TD 5 speed
'85 Jetta Diesel 1.6NA