Thread: For those with "breathy" diesels and oily intercoolers

Are there any findings from the test that you are able to post yet?

The gas outlet must go to the engine intake or the outside air, not plumbed back to the motor or you are not allowing the crankcase to breathe - the whole point of the gas coming out in the first place.
On mine it's plumbed into the air intake (must be before the turbo).

Dave

Originally Posted by 98-110

Thanks Ben.

I'm was actually referring to the gas outlet; the bottom drain goes through the 1-way valve to the sump via the original return hose. So no problems in that respect.

My problem is finishing off the gas outlet. I was looking for a 1-way valve (that I was confident would shut off when wading through deep water) to fit and seal the gas outlet if required. I will check out those mid 80's japanese cars you mentioned in a previous post.

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There is already a one-way valve in the gas outlet, however it is designed to block off if there is too much suction, rather than what you want.

If you REALLY want to keep an open breather system, running a hose from the gas outlet down to chassis level should be sufficient to stop water getting in when wading. The one-way valves I mentioned earlier are too small for the gas outlet, I was suggesting them for the drain if you don't have the M+H one way valve.

If it was my car I would simply plumb the gas outlet back to the intake as per factory. With a provent fitted, the cleaning intervals for your intercooler should be extended by 10x if not longer.

Originally Posted by B92 8NW

Are there any findings from the test that you are able to post yet?

Yes, however only based on the results from the 15/50 who were kind enough to return their elements as promised. We also have not completed the destructive testing of the elements.

I will try and post the paper tonight. What is the easiest way to upload a pdf on here?

as an attachment to a post

Here are the results so far. They are not very conclusive yet, as we haven't done the destructive testing, and only 15 out of 50 people have lived up to their end of the bargain.

However the thing that is clear is that - the age of an engine is the most important factor wrt blowby and therefore Provent element life.

After these results were finalised I got another filter back from a heavily tweaked Tdi which was ~30mBar.

- just so everyone remembers - the Provent will vent to atmosphere if the pressure drop gets to 50mBar, however it is reccomended that the element should be changed at 20mBar.

Originally Posted by isuzurover

- just so everyone remembers - the Provent will vent to atmosphere if the pressure drop gets to 50mBar, however it is reccomended that the element should be changed at 20mBar.

How do we measure the pressure drop of the filter?

Originally Posted by isuzurover

clear is that - the age of an engine is the most important factor wrt blowby and therefore Provent element life.
(...)the element should be changed at 20mBar.

As Coastie asked...how to measure that?

BTW I'll take pics of my installation and bowl/element tomorrow and send over to you to see...I can't understand if the element is wet as it's supposed to be or soaked...but it only has 15000Km or so I believe.
Old Cube just hitted the 160'000 Kms!