[Vwdiesel] PCV vents

[B & R Decker]

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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