Let the tinkering continue.....

[Preen59]

we could design up a venturie section of pipe so that its always sucking on the provent..vent.... i figure i'll need one too when i get a pro-vent on my mk3..

Is this something that i should be thinking about with the Caddy too? Sorry to hyjack, Greg..

[Greg Roles]

No don't be sorry the thread NEEDED hijacking to get back on target!

I figure feeding the oil blowby into a muffler, via a winding copper tube to bleed off the heat, is the answer. Just need to work out how to align the tube so it is indeed a venturi, and doesn't back up with exhaust, defeating the whole purpose.

[Transporter]

I think that you can't remove 100% of the oil from the blow by and that's the problem. But yu got me thinking.

[Greg Roles]

Two Provents in series, or a smaller second or even third option would certainly do a lot if you have the room! Personally I'm just plumbing mine into the exhaust. A week of driving and not one oil drip yet is sign enough it's just vapour with a good condition Provent filter cartridge. Obviously that changes as the internal filter oils up.

[Transporter]

I could try second Provent in series, since I have the second one I didn't use.
I wait for your report how will you go with the Provent plumbed to the exhaust.

[philthy]

Hi mate, not sure if i'm on the track but one of the polo guys has a crankcase fume evacuation setup with a one way valve plumbed to the exhaust. Any use?

Thread:

http://www.vwwatercooled.org.au/newforum/upload/showthread.php?t=25317

valve:

http://store.summitracing.com/partdetail.asp?autofilter=1&part=MOR-25900&N=700+400105+115&autoview=sku

Cheers,

-Phil

[Transporter]

That would work 100% but unfortunately would be illegal for road use. The chemicals from the oil would be danger when in the air. Imagine every TDI converted like that.

[philthy]

That would work 100% but unfortunately would be illegal for road use. The chemicals from the oil would be danger when in the air. Imagine every TDI converted like that.

I was thinking that you'd use one of these with the provent oil seperator, to avoid blowing exhaust gas back through it.

[Transporter]

Provent does actually quite good job, so it is probably not worth of the trouble. Might as well went it to atmosphere.
The reason why it would be illegal is because Provent doesn't remove 100% of the oil 100% of the time and need to be monitored and filter inside replaced regularly.
But thumb up to that bloke with Polo in that thread you posted link to.

[Greg Roles]

Awesome find Phil, thankyou! I'm onto one of those valves!

My Provent plumbed currently to air is nasty. All I can smell is burning oil at the lights, and at night, I can see the smoke in the headlights if the breeze blows that way. I have a new Provent insert. The pipe is still oil drip free,and the Provent is collecting liquid well but there's a LOT of blowby gas in the GT TDI. I have to dump it in the exhaust far enought up that it will burn, as even plumbing it out the back, is going to give you, and the car behind, that sickly burning oil smell. It's not good.

The upside is my inlet is clean, even if I'm giving myself lung cancer.

[Transporter]

Greg,
if it is clean and no oil in the fumes, than just plug it back in inlet. I think that unless you plumb it in front of the DPF it will still smell from the exhaust.
When you diverting the air from Provent, did it improved the power somehow or is the engine running smoother - just asking because when I tried on my T5(no DPF) I had the same experience with it like you; just smell and steam at the traffic lights and no difference to the engine running.

[jayjay]

how far down would you need it with the particulate filter? i'm only guessing here but wouldn't burning oil be a big no no for clog-unfriendly DPFs?

i love the way you rationalise your mods. it's not like "i'm lazy, i'm going to the ecs tuning webpage, i'm buying $20k worth of shiny plastic".

[Transporter]

how far down would you need it with the particulate filter? i'm only guessing here but wouldn't burning oil be a big no no for clog-unfriendly DPFs?

i love the way you rationalise your mods. it's not like "i'm lazy, i'm going to the ecs tuning webpage, i'm buying $20k worth of shiny plastic".

Yes, you could damage the DPF with oily vapors, but since there would be no oil... I still wouldn't do it. Damage from the risk would out weight the benefit.

[Greg Roles]

I've not noticed one thing different with the blowby being total loss. Engine as per normal. Except the smell. Going to hook it up with one of those cool valves right after the DPF, and see what happens. Pre DPF is a mistake, as oil burns to ash, and this does indeed remain forever in the $5k DPF. Even blowby contains some oil, believe me i can smell it!!

No Transporter mate, going back to stock is NOT what I'm about! That's your way!!

[Greg Roles]

Yes, you could damage the DPF with oily vapors, but since there would be no oil... I still wouldn't do it. Damage from the risk would out weight the benefit.

No different to pouring it all into the inlet as per stock, the oil burns to ash, and the ash cannot be regenerated or burnt off. VW states this themselves in my material. ANY oil ash clogs the DPF, period. It's half the reason I'm doing what I'm doing, to avoid the sludge in the inlet, to avoid clogging the DPF any faster, and leaving more space for Oxygen!!

Despite the current smell, my DPF has just had a life expectancy rise!