Install of Provent and why you need a Provent

RedJeepCRD · **Posted:** Fri Nov 25, 2005 7:13 pm

Well I started the install of my Provent today. My CRD has right at 12000 miles on it. I started with a trip to the auto parts store and ACE hardware. I looked at several options for reducing the size of the hose outlet on the Provent. I ended up using a PVC reducer and a small piece of 1/2 PVC pipe to adapt the Provent to the factory CCV hose size. I painted the PVC reducer black to try and make it look as factory as possible. Check out the photos. I ended up using JB weld to attach the reducer to the Provent instead of RTV.

After returning home and finishing the Provent reducers I pulled the hose from the CCV and the air intake tube. It was a bit hard to break loose but came off with a little pulling. I was very surprised to find all the black sludge in the hose. GEEZE!!

I then removed the intercooler hoses. GEEZE!!! They where full of black sludge. (remember that this is after the air filter!! A lot of good it does to filter the air if your pushing all this sludge into the motor with the turbo.)

Well I didn't get all finished but fabbing up the mount for the Provent is the hardest part. It's also pretty hard to get the hoses run without kinking them.

I'll try to get it done tomorrow and post the final pictures.

Wes

retmil46 · **Posted:** Sat Nov 26, 2005 2:04 pm

As far as adapting to the 1" hose connections on the Provent, you can do it without gluing on adapter fittings.

You can get 1" ID nylabraid hose at most every hardware store, and also adapter fittings that have 3/4" male pipe thread on one end and a 3/4" ID hose connection on the other.

3/4" male pipe has a 1" OD, perfect for fitting snugly into the 1" ID nylabraid hose.

Cut a piece of nylabraid just long enough to cover the Provent connection and the male thread portion of the adapter. shove one side over the Provent connection, shove the male thread portion of the adapter fitting in the other end, and a couple hose clamps to keep them snug.

RedJeepCRD · **Posted:** Sat Nov 26, 2005 4:30 pm

Well I ended up changing my mounting setup. All that work on brackets and I just ended up letting the Provent just hang loose. I took it over to my local dealer to let there diesel guy look at it. He said it's a great idea but that DC could possibly give me problems about the warranty on the emission items. He said he knew that it would do nothing but help but he stated that if it was his vehicle he would leave it loose. He convinced me to leave the Provent where I could take it out quickly incase I broken down on the road. He stated that it would be better to keep my original CCV hose in the back of the jeep and if something happens, unhook the Provent and install the factory hose. He said nobody would know the difference that way and no one could question the warranty.

He did state that DC would be hard pressed not to warranty something over the Provent BUT they could make it a pain in my rear every time I brought it in with something engine related wrong.

I took his advice and modified my setup to make it quicker to remove without tools and I threw the factory CCV hose in the back just in case.

I still think it’s pretty hard to tell the Provent is not factory when just looking under the hood.

I also removed all the air intake hoses and intercooler hoses and cleaned them out the best I could. I will check them again when I change the oil next time and see it the Provent is working.

Wes

grywlfbg · **Posted:** Sat Nov 26, 2005 4:54 pm

I went to both the ACE and Home Depot near my house and the largest hose they had there was 7/8" ID. So I went the glued adapter route. I figured RTV would allow for some vibration absorption - would be less brittle than JB weld. I'll just keep an eye on it and see.

I also just let mine hang loose (ran a tie-wrap around it just in case but w/ the hood down it isn't going anywhere).

Ranger1 · **Joined:** Mon Oct 17, 2005 7:40 pm **Posts:** 1137

After all that fab work, I'd put the bracket back in. It probably isn't a good idea to leave the Provent loose in the engine bay. I installed mine back in March and when I needed to have the EGR replaced, I just removed it. 10 minutes and its out. As far as breaking down somewhere, whats going to happen? Is Jeep going to suddenly show up without you calling them? Not likely... just keep a small wrench and the original hose in the back and if it ever happens, take it out, restore the original and then call them...

retmil46 · **Posted:** Sun Nov 27, 2005 3:08 pm

grywlfbg wrote:

I went to both the ACE and Home Depot near my house and the largest hose they had there was 7/8" ID. So I went the glued adapter route. I figured RTV would allow for some vibration absorption - would be less brittle than JB weld. I'll just keep an eye on it and see.

I also just let mine hang loose (ran a tie-wrap around it just in case but w/ the hood down it isn't going anywhere).

That's strange, they might have been out of stock. Home Depot and Lowes both carry all the way up to 1 1/4" ID nylabraid in my area.

I don't know about the RTV, I tried sealing some of the fittings with high temp copper RTV when I tried another type of CCV filter (Condensator), and whatever was in the oil just turned it to mush! :shock:

Also, I had a 90 degree PVC pipe elbow with female pipe thread in both ends, that I had nylon hose adapters screwed into. Every few days, I'd notice that the fittings had come loose, and I'd have to tighten them another turn, until eventually they were bottomed out and the elbow itself started to fall apart. The oil had attacked and softened the PVC elbow until it failed.

RedJeepCRD · **Posted:** Sun Nov 27, 2005 3:09 pm

RTV is going to be a better choice than JB weld. JB weld dripped around on the inside of the Provent and I had to scrape it out before installing the provent.

Wes

RedJeepCRD · **Posted:** Sun Nov 27, 2005 3:12 pm

Geeze, try the RTV that is oil resistant. I'm not sure about the PVC. That not good if it start breaking down.

Wes

retmil46 · **Posted:** Sun Nov 27, 2005 3:39 pm

RedJeepCRD wrote:

Geeze, try the RTV that is oil resistant. I'm not sure about the PVC. That not good if it start breaking down.

Wes

Unfortunately, it WAS supposed to be oil resistant! :shock:

But then, oil resistant for gasoline service and oil resistant for diesel may be two different things. fortunately, I was only using it to seal the threads on some pipe fittings, so no major calamity there.

when i switched over to the Provent, I replaced the PVC elbow with brass, and the RTV with pipe joint compound for sealing the pipe threads. So far, that seems to have cured all the previous problems. The nylon fittings have been unaffected by the oil.

RedJeepCRD · **Posted:** Sun Nov 27, 2005 4:44 pm

Any one had problems wiith the heaterhose breaking down?

Ranger1 · **Joined:** Mon Oct 17, 2005 7:40 pm **Posts:** 1137

RedJeepCRD wrote:

Any one had problems wiith the heaterhose breaking down?

After about 8 months on my Provent, my hoses are fine. But I used reinforced pvc instead of heater hose.

miamitj · **Posted:** Sun Aug 06, 2006 2:45 am

Bovie · **Posted:** Sun Aug 06, 2006 9:26 pm

I still don't get that the CRD does not come stock with a provent. My 1983 Mercedes Benz 240D has one that is almost identical to the provent. Mercedes saw that this was a problem over 20 years ago. How come jeep cannot see there is a problem now. I cannot see that having oil going into the intake and being burnt does anything to help emisions.

crdawg · **Joined:** Mon Sep 12, 2005 10:55 pm **Posts:** 98

Try getting hydraulic line,you can get them in different sizes and resist any oil based breakdown. they last alot longer too.you get the hose by itself ,of course no end on it.

retmil46 · **Posted:** Mon Aug 07, 2006 10:18 am

Bovie wrote:

I still don't get that the CRD does not come stock with a provent. My 1983 Mercedes Benz 240D has one that is almost identical to the provent. Mercedes saw that this was a problem over 20 years ago. How come jeep cannot see there is a problem now. I cannot see that having oil going into the intake and being burnt does anything to help emisions.

Unfortunately, even MB quit putting oil separators in the CCV/Breather hose. The '87 300D I acquired about a month ago has the same setup as the CRD, just a tube that goes from the valve cover to the air intake.

That's turning out to be a fun job, cleaning out 134K miles worth of oil from the air intake and intake manifold. There was so much oil leaking out of the intake boot it had run down the side of the engine and looked like it had sprung a leak on the turbo drain. The overboost sensor and it's port was completely clogged with oil and gunk. The pressure hose to the turbo wastegate had rotted off at the turbo fitting and was full of oil, as was the wastegate actuator itself.

While I'm still in the process of cleaning out the intake, I've since taken care of the source - the '87 300D is now sporting a Provent.

Install of Provent and why you need a Provent

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