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  #13  
Old 11-13-2014, 10:52 PM
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Re: Diesel ccv mod

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Originally Posted by Roadkill View Post
The counterpoint is the several threads on this very forum where those who have installed catch cans on their WK2 EcoDiesels have immediately started collecting oil (and here Zybane noted his Provent collected 4 oz in 2k miles).

That's even before getting into the pics of coked-up turbos on other vehicle platforms that use EGR without catch cans.

Is this a problem if you're dumping the vehicle during the manufacturer warranty? No.
Is this a problem if you're hoping to make your vehicle last 12+ years? Well, how much does it cost to remediate a coked turbo vs how much does a catch can cost to install?
And to counter that, 4oz/2k = 20oz/10k. Dipstick Min-Max marker is 54oz, and the catch can collecting every blowby oil drop (100% efficiency), the dipstick should show more than a third below maximum when you are 10k into your oil use. I've had two oil changes until now and could barely see a level change on the dipstick. Unless those 20oz of oil are diluted by diesel, I don't see any major quantities of oil being deposited back to the inlet.

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  #14  
Old 11-13-2014, 11:34 PM
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Re: Diesel ccv mod

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Originally Posted by netboy View Post
And to counter that, 4oz/2k = 20oz/10k. Dipstick Min-Max marker is 54oz, and the catch can collecting every blowby oil drop (100% efficiency), the dipstick should show more than a third below maximum when you are 10k into your oil use. I've had two oil changes until now and could barely see a level change on the dipstick. Unless those 20oz of oil are diluted by diesel, I don't see any major quantities of oil being deposited back to the inlet.
I think it is more likely that the diesel dilution being cooked off is a significant part of the vapors in the crankcase. Its just as nasty.

Either way, the EPA tells the manufacturer to create a sealed system. The manufacturer must comply even if it isn't the best option for long term reliability. It has to work past the warranty...that's the minimum design criteria. If it lasts longer, great. If not, WE pay. I suspect somewhere past 150k miles is where the EGR/PCV problems will begin.
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  #15  
Old 11-15-2014, 07:56 AM
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Re: Diesel ccv mod

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Originally Posted by 2012 Summit View Post
Sorry, I can't elaborate other than what you stated about a reduction in pressure. Perhaps at factory designed pressures, the built in separator is more effective. I don't really know.

I originally posted "I" wouldn't be too concerned. Everybody is entitled to their own opinion and if installing a catch can makes you happy, you could consider installing one. It very well may eliminate problems down the road.
The so-called high efficiency separator is a bunch of bunk. Simply take off the elbow air intake tube that lead's to the turbo intake (post PCV recirc input) and rub your finger around the inside of the tube. Before I even put on the Provent200 with just a few thousand miles the intake tube was coated with oil. Simple test for anyone that can "turn a screwdriver". I was pissed that I even waited that long seeing how much oil there was in there and how much had invariably already gotten on the turbo blades.
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  #16  
Old 11-15-2014, 09:15 AM
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Re: Diesel ccv mod

Quote:
Originally Posted by Zybane View Post
The so-called high efficiency separator is a bunch of bunk. Simply take off the elbow air intake tube that lead's to the turbo intake (post PCV recirc input) and rub your finger around the inside of the tube. Before I even put on the Provent200 with just a few thousand miles the intake tube was coated with oil. Simple test for anyone that can "turn a screwdriver". I was pissed that I even waited that long seeing how much oil there was in there and how much had invariably already gotten on the turbo blades.
Any scientific proof besides the finger rub?
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  #17  
Old 11-15-2014, 09:22 AM
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Originally Posted by 2012 Summit View Post
Any scientific proof besides the finger rub?
This proves oil is making it back to the intake. Any scientific proof it *doesn't* get to the turbo from there? Seems like a lot of faith in the built-in separator.
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  #18  
Old 11-15-2014, 11:35 AM
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Re: Diesel ccv mod

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Originally Posted by 2012 Summit View Post
Any scientific proof besides the finger rub?
Maybe Chrysler pre-lubricates the PCV hose?

Seriously, it's very oily and it's imediately upstream of the turbo inlet...what other proof is needed?

So, I'd like to see the results of removing the PCV hose at the turbo inlet and let it vent on a tissue while running. I bet it leaves an oily residue. I'd also like to see the same results from the outlet of a catch can. THAT is the scientific proof that would favor using a catch can.
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  #19  
Old 11-15-2014, 03:06 PM
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Re: Diesel ccv mod

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Originally Posted by Roadkill View Post
This proves oil is making it back to the intake. Any scientific proof it *doesn't* get to the turbo from there? Seems like a lot of faith in the built-in separator.
I never said I was a scientist.
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  #20  
Old 11-16-2014, 12:01 PM
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Re: Diesel ccv mod

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Originally Posted by 2012 Summit View Post
Any scientific proof besides the finger rub?
That's what she said..
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  #21  
Old 11-16-2014, 01:31 PM
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Re: Diesel ccv mod

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That's what she said..
She said that's how she got pregnant.
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  #22  
Old 11-29-2014, 07:37 AM
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Re: Diesel ccv mod

This exact issue came up in the 2.8 VM in the Liberty. Just vent it to the atmosphere and be done. Unfortunately, this created lots of smoke. I got tired my wife saying people would walk by her running Libby and say it was on fire b/o the vent smoke. So I finally put in a Provent vented to atmosphere and a catch can. Problem solved. This what I will do to a GC if and when we get on to replace out libby. It'll go from dealer to my garage and the mods will begin. If I have to take it back for warranty, I'll just put it back to stock.

As far as codes go, if lack of back pressure sets a code, then removing the oil cap while running would cause it. I haven't heard of that being and issue so I doubt that'll be a problem.
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  #23  
Old 11-29-2014, 10:32 AM
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Re: Diesel ccv mod

You will get a CEL...
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  #24  
Old 12-04-2014, 08:01 AM
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Re: Diesel ccv mod

From too much pressure or too little?
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