I think this is the right place to post this... anyway I've got a friend with a powerjoke who's not all that mechanically inclined so I'm going to assist him this weekend with a PCV mod. Basically from what he's told me (which is very little) a few of the powerjoke owners are modding the PCV system to prevent oil from going into the CAC, thus reducing the possibility of CAC boot blow off. He says the mod involves some kind of air/oil separator vs. just piping the crankcase gases to atmosphere. I've got to admit it sounds like a good idea, I believe we've got a closed PCV system on our trucks does anyone know of a similar mod for our trucks?

I want to know about this too, does anybody know how the duramax handles PVC ?

People have done that on the lly as well as just venting it like it was on the lb7.

Hmm... I must not be very adept at using ye 'ol Diesel place search engine :help2: I can find PCV info for the 6.5 but not much other than posts of blow by coating the undercarriage on the LB7's for the 6.6.

Anyway here's a link to the air/oil separator that I'm supposed to install... looks like a high quality unit (and better be for what he paid for it $$$) http://www.republicsales.com/MANN/Provent_Brochure.pdf

This system is apparently made for commercial vehicles, so I get to do some fabbin to make it work :muahaha:anyway now that I've got some intel from him I figured I'd put it out here see if anyone has done anything similar for us.

For those of you interested in this as a possible mod for the Duramax I Completed this mod over the weekend with a little help from my friend (i.e. Google) and a few cold ones on a furd. It was a bit of a pita really with a lot of running to the parts store and back due to shade tree engineering. So far I will qualify this as a limited success as he's put just over 100mi on the truck and it didn't blow up ):h time however will tell as he should be putting a thousand or so on the truck over the next two weeks.

Some interesting observations. After the 100 mile trip I disassembled the air/oil separator and along with a fine oil coating (yes after 100 short miles oil was visible) there appeared to be water! This will warrant further investigation. The CAC boot which we had disassembled and cleaned earlier was still bone dry, this votes well for the mod but again will be checked in a thousand or so miles. Finally he swears his truck has more power now :eek:, which I find very hard to believe.

So I've got some questions. Water in the crankcase gases, does that sound normal? It was very minimal, and may have been really clear oil vapor but it sure looked like water to me, and there does not appear to be any on the dip stick (which we must have checked a dozen times). A fine oil coating after just 100 miles!!! I really didn't expect to see much of anything in the air/oil separator... I wonder if our trucks produce as much? Finally more power? Alright if I really reach for it, I mean really grasp for straws so to speak I might believe that really fine oil vapor suspended in the compressed air charge would burn but would that actually give more power or is my friend really nuts (I know he bought a furd but don't hold that against him).

I'm still evaluating (and probably will be for his next 1000 miles ):h) this as a possible mod for our trucks. Like EGR coating the intake of our trucks I'm wondering if crankcase gases coating our CAC and intake track is something that maybe should be eliminated.

Thoughts? Opinions? I'd really love to hear em.

Water coming in through the airbox?

I vote for condensation. I would think in humid areas after the motor cools you will always end up with a drop or two of condensation. Then when you fire it up and it gets to operating temp it burns off.

Water coming in through the airbox?

Hmm... possible but I doubt it as we've not had rain in several days/weeks

I vote for condensation. I would think in humid areas after the motor cools you will always end up with a drop or two of condensation.

again possible but I doubt this one as well, he (as I) live in the high desert (Reno) not much humidity here.