[Vwdiesel] PCV vents

[Shawn Wright]

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