Hello,

I have owned a Liberty since 2002 and I liked it so much I just bought a 06 CRD so I have been reading all the posts I can and noticed that many people have either installed a Provent to help improve reliability and hopefully preventing premature failure or were going to install one.
My question is how has DC or the dealer reacted to having one of these installed? Every time I’ve gotten a warranty repair the person I deal with acts like the money for the repair is coming out of their next paycheck so I could easily see the dealer or DC saying that the failure was due to this piece of equipment being installed and that the warranty was void.

Thanks
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89 Jeep Comanche Eliminator. 02 Jeep Liberty Limited 3.7L 4X4. 03 Jeep Grand Cherokee Overland 4X4. 06 Jeep Liberty CRD Limited 4X4.

It seems to be up to the dealer from what I have seen. My dealer tech's think that either you use a ProVent filter or you do the Elephant hose mod, even one of the service writer's has done the elephant hose mod after seeing my CRD.

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91 MB 300D 2.5L Turbo. Her's

05 MB E320 CDI. Mine

Ok, I'm new here. What is the "elephant hose mod"?

That is where you unplug the hose from the Pressure Regulator (CCV) then plug it and then you run a hose from the CV over the side of engine so it can drip.
Look for my clear hose below. Yes the engine cover fits back on without a problem.

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91 MB 300D 2.5L Turbo. Her's

05 MB E320 CDI. Mine

Ah, I see. A solution that is marvelous in its simplicity. But does it make an oily mess on your driveway?

I did the mod to mine just like in the picture including the clear hose. I have had a couple of spots in the garage from oil. Not much.

I noticed a little oil puddling up near the CCV early on, but has since not been there. I believe the suction provided by the factory hookup literally "drew" the oil up and out. You can tell the vapor coming out has some oil in it by looking thru the clear hose. I will take a couple of spots in the garage and use a little oil dry than have a CAC full of caked up oil.

OldNavy is playing around with a filter setup that I am interested in trying. I am not worried about the open air mod being I live in an area that doesn't work overtime complying with the EPA. If I need to take to dealer, I will just hook up the hoses like from factory and change back after dealer does their thing.

Cliff

Mine has been to the dealer several times with the Provent installed and working. It has also been inspected by DC's District Service Manager and their Technical Support Rep. which are both well aware of why it was installed. Given the problems I have been seeing with my CRD, I don't think they have the stones to tell me to remove it.

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2005 Liberty Sport CRD, Lt Khaki, sunroof

Thankful to now be an EX-CRD owner.

Maybe they actually knew something about diesels and realized it was a cure for oil in CAC system.

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91 MB 300D 2.5L Turbo. Her's

05 MB E320 CDI. Mine

. . . that folks would be willing to advertise on the internet that they are violating federal criminal law.

_I_ chose to remain legal by investing in and installing a ProVent.

Folks, the "elephant hose mod" may indeed be elegant in its simplicity, but it is also a bad idea. There is a reason these vehicles have CCV systems: about 85% of the pollution cars emitted before the advent of pollution control systems comes from that one hose. Put another way, doing an elephant hose makes your vehicle almost 10 times the pollution source it was before.

Please don't do that.

Yes, I quite agree SOMETHING HAS TO BE DONE. But keep it legal: your ride is worth the $140, and so is the air we all breathe. Thank you.

Untill D/C fixes the problem that is causing many reliablity problems that are very costly to repair and need repairing about every 10,000 to 15,000 the the EPA can stick it where the sun don't shine. They have sold a poorly designed system and should take responsibilty for correcting the problem not us.

As you can see I can get a little testy when accused of being thoughtless about the enviroment. One of the first things I did after buying the CRD was to check the CCV to see if it was properly designed or would I have to go with a provent or do as I did with the VW's and design a filter system that easy filter the oil and returned it to the engine while passing the gasses on to be burned in the engine. I choose after looking the engine bay over to leave the system connected and try to locate a mfg of the VW type of filter system I designed. The problem I have run into is that by the time I get a mfg to get on board I have a system so oiled up as to be impossible to conduct any real testing, then the other tester has a tranny failure and has to remove his for trip to dealership. Here I sit waiting for parts to arrive and date for the CRD to be brought in for this repair.

I have really worried about the new design of this filter because the young engineer decided that he does not want to follow my design idea and want's to leave the CCV Pressure Regulator on the engine and reduce the filter space big time. He's never designed and built one and I have, but it was his dollar so I had no option but to go along with his idea. I have modified my test unit to add more filter material but I'm not sure the unitl has enough filter material even with my mod.

See Naturist what a testy mood I am in with this CCV thing and that I don't like polluting the air that I breath any more then you my friend. So don't take the rant as a personal attack, it is not meant that way. I just had some things that needed saying and you just brought it out and for that I say thanks because I feel better now.

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91 MB 300D 2.5L Turbo. Her's

05 MB E320 CDI. Mine

AMEN!!!!! Even though I had the financial and mechanical ability to install a Provent, and did so, I completely agree with the above sentiment. Bottom line is, THIS COULD AND SHOULD HAVE BEEN RESOLVED BEFORE THE FIRST VEHICLE EVEN ROLLED OFF THE ASSEMBLY LINE.

Go buy the Haynes manual for an MB '76-'85 Model 123 diesel. Check out the Emissions section and the CCV system. What do you see? An honest-to-god factory installed oil filter/separator with a drain back to the engine sump. MB has been doing this for at least 30 years.

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Mitchell Oates
'87 MB 300D Diamond Blue Metallic
'87 MB 300D - R.I.P. 12/08
'05 Sport CRD Stone White
Provent CCV Filter/AT2525 Muffler
Stanadyne 30 u/Cat 2 u Fuel Filters
Fumoto Drain/Fleetguard LF3487 Oil filter
V6 Airbox/Amsoil EAA Air Filter
Suncoast TC/Shift Kit/Aux Cooler
Kennedy Lift Pump/Return Fuel Cooler

Yeah, what he said and this: Engines don't grow in the rainforest. They take energy to produce. Shortening their efficiency and life expectancy is a bad idea. The factory setup does both - shame on DC for building it and the EPA for passing it. If the EPA doesn't take their job seriously, how can the rest of us? The elephant hose mod should only be temporary. The provent would be perfect if this vehicle had more underhood space. I really wish they would make one that was sized to these smaller engines. I will be running a closed, filtered CCV again by fall one way or the other. Don't get me wrong, I'm not trying to be arguementative, but where did you get the 85% number? The way I see it, diesels today are suffering from some the same halfbaked ideas that gassers had in the 70's and early 80's. It is going to take a while to figure out how to do this correctly. In the meantime, we are all lab rats. By the way, who says a Provent is legal either? It still constitutes a modification to an emissions system. People have been railroaded for less.

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Matt B.

05 Limited CRD. Bought it new. 112k on the clock now.

GDE Eco-tune, rear differential drain plug (drilled and tapped the pumpkin), transmission pan drain plug, Fumoto oil valve, fuel filler neck restriction removed, front hitch, Hayden fan clutch, Sears P1 battery since 08, Mobil 1 5w40, 5 volt glow plugs, DIY timing belt at 109k

The top of the black CCV vent oil recovery system can be seen on the far side of the engine infront of the air cleaner on my 1983 240D MB dieslel W123 series car. It had hose coming out of valve cover going to recovery device and another hose to intake manafold and a drain line at the bottom to the oil sump. So somewhere along the way MB engineers have dropped the ball and Chrysler tripped and fell over that ball.

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91 MB 300D 2.5L Turbo. Her's

05 MB E320 CDI. Mine

Jeep also sold a Grand Cherokee in past years in Europe with the VM Motori 531 OHV engine. Its a 3.1 Liter, indirect 5 cylinder diesel engine - on their website, it has a Provent sized ccv right on the engine and is described as being installed on a "famous SUV." It's also described in the "Past vehicles" section - a GC with a 3.1 5 cylinder indirect diesel engine. DC knows what to do. They've done it in the past on other jeeps. Hard to belive such a tiny piece of plastic junk on the R428 could cause so many problems. In retrospect, with so much riding on their launch of the CRD Liberty, it looks foolish and rather stupid to have used that ccv and torque converter combination on an otherwise fine diesel engine vehicle. Dr. Z's German engineering?

Back at the ranch, in an effort to see what would be involved in cleaning my intercooler without taking it out of the jeep, I looked to see if I could drill a couple of holes in the bottom, drain the oil, clean it out and then plug it. NOT! Once underneath the intercooler, I find it has no bottom tank - its a side tank design, like the radiator. The bottom has an aluminum plate on it, but its for support - through the drain holes in the plate, you can see the aluminum fins on the bottom. The side plastic tanks are not accessible from the bottom. Looks like it needs to be removed to be cleaned. Drill into the bottom of that baby and you'll solve the oily intake issue - as long as you don't mind driving without any turbo boost. It'll be an oil-free, but slow trip.

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2005 LTD CRD RB1 NAV/Htd Leather seats/Amsoil EA filters
SunCoast Mega Trans & Billet TC/PML pan/Aux cooler
Fuel cooler/Lift Pump/10um Pri/Racor R490 2um Sec Fuel Filters
IronMan Lift/Shocks/Provent/Moog ball joints/ V6 Airbox/Fan/Hayden
Cobalt Boost/EGT/Oil/Trans/Volt gauges/Aeroturbine 2525
Yeti Hot Tune/Odessey 65/Samco's/Michelin Defenders

A short trip off topic - Walt, the way the engine compt in your '83 looks in the above pic? Engine compt in that '87 looks just as good if not better.

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Mitchell Oates
'87 MB 300D Diamond Blue Metallic
'87 MB 300D - R.I.P. 12/08
'05 Sport CRD Stone White
Provent CCV Filter/AT2525 Muffler
Stanadyne 30 u/Cat 2 u Fuel Filters
Fumoto Drain/Fleetguard LF3487 Oil filter
V6 Airbox/Amsoil EAA Air Filter
Suncoast TC/Shift Kit/Aux Cooler
Kennedy Lift Pump/Return Fuel Cooler

I've looked at the feasibility of installing an intercooler drain as well, and came to the same conclusions.

One other possibility - if there aren't any baffles in those side tanks, then you could run a suction hose all the way to the bottom of the side tanks to pump out whatever cleaning solution or flush water you dumped in.

With a suitable hose and pump, you could them pump out all but a fraction of any fluid inside the intercooler. Any remainder could be blown out/evaporated with a good high volume shopvac or blower. Or you could simply reconnect the inlet hose, start and rev up the engine, and let the turbo blow it out.

I'd been thinking of taking a length of 1/2" nylabraid I have, taking off one of the CAC hoses, and seeing if I could run it to the bottom of the side tank. But other events have gotten in the way.

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Mitchell Oates
'87 MB 300D Diamond Blue Metallic
'87 MB 300D - R.I.P. 12/08
'05 Sport CRD Stone White
Provent CCV Filter/AT2525 Muffler
Stanadyne 30 u/Cat 2 u Fuel Filters
Fumoto Drain/Fleetguard LF3487 Oil filter
V6 Airbox/Amsoil EAA Air Filter
Suncoast TC/Shift Kit/Aux Cooler
Kennedy Lift Pump/Return Fuel Cooler

Cool dude. I'm still looking at that N/A '96 MB E Class I sent the link to last week. I am just not crazy about the W210 chassis, but if the vehicle was right and I was confortable.

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91 MB 300D 2.5L Turbo. Her's

05 MB E320 CDI. Mine

I live in the Atlanta area and am technical enough to understand the problem that necessitates the pro-vent on the CRD, but not mechanically inclined enough to understand how (or where specifically in the motor it hooks up) to install one on my CRD. I have a really good rapport with my dealership. I won't need to remove it for warranty repairs (the diesel tech there will understand he is a big diesel guy himself with his own personal cars) when I explain to him why it is there. Is there anyone in this area who can help me out with a referral to get one installed properly by someone who understands where it needs to be hooked up? With only 3k on my odometer, I'd like to preserve the turbo and intercooler for as long as possible, because from what I am reading, odds are it is going to fail after my 7/70 powertrane has lapsed and I dont want to be stuck paying for a new one of either of those parts, plus the cleaning.

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'05 CRD, Midnight Blue. Every option. Nice ride, idles like a garbage truck

It would be easier if we knew what part of the world you live in dude.

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91 MB 300D 2.5L Turbo. Her's

05 MB E320 CDI. Mine

Last I remember - Atlanta was somewhere in Georgia

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2005 CRD
stuff
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