Not for a duramax, but a really fine product we might be able to use...

H

Hot COCOAL

May the farce be with you
Jun 9, 2012
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So I just installed an oil catch can for the PCV system on my Golf R and I was thinking about how I plumbed my PCV re-route into my downpipe on the duramax and how this "might" have worked instead, and could work for others looking to do a PCV re-route on their D-max. Granted it may be to small of a chamber for a duramax, IDK, but I thought someone may be able to take some design cues from this and make one for a d-max or possibly get the owner of this company to make a larger custom one if need be...he's a pretty cool dude.

Anyways, he has all sorts of mounting brackets and possibilities, and the catch can is not model/platform specific, so I thought it was worth a shot mentioning to you all

Check it out, it's not your typical catch can
:hug:

http://store.42draftdesigns.com/Catchcans.html
 
TROJAN366

TROJAN366

Gold Rush
Jan 13, 2012
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1 way valve allows the air to vent from the heads into the downpipe. There is a write up in Simon's PCV reroute thread somehwere on how it works.
 
C

Crawler

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Aug 26, 2013
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I've done this on Cummins engines before. I prefer to use a catch can with two valves in it.

In the Cummins application, a one way check valve plumbed to the exhaust drew out acyual oil at times and not just oil vapors and harmful gasses.
 
H

Hot COCOAL

May the farce be with you
Jun 9, 2012
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Cknight199 said:
Did I interpret that correct? Is your PVC dumping oil into your downpipe...?
Click to expand...

Yeah "dumping" would be oils and recirculated gasses into my hot exhaust 1' from the turbine in the downpipe, v.s dropping on the ground, in my driveway when I park, splattering down my undercarriage or contaminating my intake from the compressor inlet all the way through the entire intake system...

"Dumping" is an exaggeration, and it gets vaporized in the exhaust....
 
Cknight199

Cknight199

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Aug 23, 2012
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Hot COCOAL said:
Yeah "dumping" would be oils and recirculated gasses into my hot exhaust 1' from the turbine in the downpipe, v.s dropping on the ground, in my driveway when I park, splattering down my undercarriage or contaminating my intake from the compressor inlet all the way through the entire intake system...

"Dumping" is an exaggeration, and it gets vaporized in the exhaust....
Click to expand...

Yea I know it was an exaduration, I was just curious how it worked :)
 
H

Hot COCOAL

May the farce be with you
Jun 9, 2012
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Crawler said:
I've done this on Cummins engines before. I prefer to use a catch can with two valves in it.

In the Cummins application, a one way check valve plumbed to the exhaust drew out acyual oil at times and not just oil vapors and harmful gasses.
Click to expand...

I do have the one way valve you mentioned, and I actually have checked the downpipe worried that I would find oil residue and gunk in it, but everything looks to be normal, so far so good:baby:

That's why I thought I would show this catch can I found, I thought it might be a better alternative to some of the measures some of us have taken, and I thought this one is slightly better than others I have seen and worked with.

As for the gasses and oils from the PCV being exposed to the hot gasses in the downpipe, YOLO. JK, I'm not worried about it
 
DAVe3283

DAVe3283

Heavy & Slow
Sep 3, 2009
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The PCV gasses will probably just combust in the exhaust, much like they would if re-introduced to the intake like stock. I wouldn't worry about that.

I would worry about the Venturi effect pulling too much of a vacuum on the motor and increasing oil consumption. The flip side is you will get better mileage with a near-vacuum in the crank. :woott: (My 2013 Cruze Eco pulls a CRAZY vacuum in the crank case from the factory, but it is designed to run that way.)

If you design the "T" into the downpipe correctly, it should work great.
 
Harbin_22

Harbin_22

Active member
Dec 4, 2010
3,858
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I have had my pcv going into the exhaust with the one way moroso valve for 20,000 miles with absolutely no trouble at all. I check the valve every once in a while to make sure it isn't sticking and it has been good.


For all you worried about pulling vacuum threw the exhaust, do you know where the pcv is hooked up from the factory? About 3" from the compressor wheel on the turbo. The exhaust vacuum is not greater then the amount of pull from the turbo.
 
JoshH

JoshH

Daggum farm truck
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Harbin_22 said:
For all you worried about pulling vacuum threw the exhaust, do you know where the pcv is hooked up from the factory? About 3" from the compressor wheel on the turbo. The exhaust vacuum is not greater then the amount of pull from the turbo.
Click to expand...

Bingo!
 
MACKIN

MACKIN

Smell My Finger...
Aug 14, 2006
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chevyburnout1 said:
Hell I just have a hose venting below my skidplate. I've never seen a single drip of oil out of it. Is a catch can necessary?
Click to expand...

Thats the way the 01's were set up right off the assembly line. I use to see some wetness in the area but no drips that I recall. If you are catching oil you have excessive blow bye or diesel in your oil.
 
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