Provent / catchcan fitment kits.

[Greg Roles]

Yep, but return to sump is not ideal in a diesel as you are already hammering your oil with soot and diesel blow by, so the Provent drain is better discarded. I ran a return to dump in the Golf, but did change the oil twice as much. This time I'm draining it off.

[Greg Roles]

I still need to put one on the Caddy.. Hoping the water/methanol kit helps to clean the inlet, though.

It will indeed keep it spotless, but that PCV oil still ends up in a DPF if fitted.

[Ryeman]

Greg, how do you drain it off from low down on the firewall with all the plumbing in place on a/my Yeti?

[Preen59]

It will indeed keep it spotless, but that PCV oil still ends up in a DPF if fitted.

So.. Are you selling water/meth kits?

I don't currently sell one for a diesel and I like to support local business.. It is after all in our own best interests. Haha.

[Greg Roles]

Greg, how do you drain it off from low down on the firewall with all the plumbing in place on a/my Yeti?

Tube hangs out transmission tunnel and I fixed it below the passenger floor pan.

So.. Are you selling water/meth kits?

I don't currently sell one for a diesel and I like to support local business.. It is after all in our own best interests. Haha.

Mate Snow is distributed by Rocket Industries, and Devils Own had like 5% margin, so nope. I would recommend Snow for the digital controller, and Devils for odd parts, as Snow have crap aftermarket service. Snow do have an awesome Max mileage twin nozzle diesel kit, but you really only need a stage one boost referenced one as EGT reference is only really for towing up prolonged hills. I found much better performance when referencing boost as opposed to EGTs.

[Preen59]

Copy that. I'll talk to my mate Graeme... or more likely, one of his sales guys. Haha.

[Ryeman]

Greg, just clarify - the catch can collects the sum gasses but how does the oil contaminate the EGR?.
I thought the exhaust gas was free of blowby oil which was a PCV issue.
In other words does the Provent stop oil somehow contaminating the EGR?. ....Does the PCV allow/direct oil vapour to the EGR..

[gldgti]

The crankcase gasses contain an oil mist. Usually crank case gasses are returned into the inlet pre-turbo.

The EGR gasses are incorporated to the inlet air after the EGR valve, post turbo.

When the EGR is recirculating, the soot laden exhaust gas is mixed with oil laden crank case gasses and combine to deposit black carbon rich goo on the walls of the inlet after the EGR valve.

A provent or other catch can helps reduce the content of oil mist in the crank case gasses which in turn reduces the propensity of the EGR + Vent gasses to form goop.

[Ryeman]

?.....

When the EGR is recirculating, ............

Do you mean for a second time?.
Under what circumstances does it 'recirculate'?

[gldgti]

No, I mean when it is operating. Valve open. It's nature is recirculating.... It recirculates exhaust gas through the engine.

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[Ryeman]

No, I mean when it is operating. Valve open. It's nature is recirculating.... It recirculates exhaust gas through the engine.

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Yeah, I get that, it's just the matter of why an oily atmosphere would not be kept separate from the regurgitation and, instead, allowed to foul the EGR.
It's the fact that it's claimed that the catch can helps keep the exhaust gas recirculating system absent of oil mist which should never have been the case ....or is there something obvious I've missed?

(on another forum I made the suggestion that a catch can could help keep the EGR free of oil contamination which resulted in the, in hindsight obvious, statement that the two systems were separate from each other, in that the oily mist is introduced downstream of the EGR therefore not relevant to 'it's' fouling)

Am I missing something?.

[Gigitt]

You are not missing anything. Both systems are separate and one affects the other.

The issue is not one or the other. It is the combination that together they create a sludge that stick to the inside of the EGR and intake and builds up to clog everything up.

You have to remove one or the other.

It is easy to remove the oil vapour from the PCV and also LEGAL.

Removing the EGR harder and illegal.

[gldgti]

The oil most is not introduced downstream of the egr, its upstream

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[Ryeman]

The oil most is not introduced downstream of the egr, its upstream

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What!
So the PCV directs the unfiltered blowby directly into the EGR from the upstream end.
The EGR redirects some of the exhaust plus all of the oily blowby sump fumes back to the engine through the turbo for 'reprocessing'!!??
It's difficult for me to think there isn't a better system of dealing with two different systems...sump fumes and exhaust gasses separately.
No wonder there is a 'gumming' issue of both the turbo impeller and EGR plus inlet manifold as well.

[gldgti]

Please carefully reread my answers. The egr introduces exhaust gas after the turbo. The pcv introduces crank case gasses pre turbo.

There's no gumming issue of turbo impellers. That really would be crazy.

The pcv gasses are not unfiltered on modern cars, but often there is not as much oil removed as could be with a higher capacity system (such as adding a prevent)

The aim is to prevent emission of hydrocarbons from the engine. Recycling the crank case gasses through the engine is an efficient method of dealing with that.
Recirculating exhaust gas happens only during specific circumstances, which the ECU controls ( there is an egr map just like a fuel map).


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