I'm building my wj right now and I just have to keep coming back to this channel. This video helps me so much just because I'm putting my engine back together after it being worked on for 4 months, much longer than expected, and I can't remember how all the hoses are supposed to go back together!

First and Foremost, thank God we've got people like you whom take the time too make these awesome videos and for that I'd like too thank you...I've spent quite a bit of time watching your videos over and over as I've battled my 02 WJ 4.7 over the last 5 years of owning it....First it was the cooling system the Jeep Went through 4 T-Stats, Water pump then after I got that mostly sorted I kept getting misfires on #2 plus had a few spark plugs get eaten..I replaced coils but no luck and it took me a year to find out that my H- Balancer was the problem when it finally exposed itself one day due to the rubber on the balancer stretching from it creating a ticking noise as it ran...My local shop wanted $800 to repair so me and my good friend did the work and since the Hydraulic unit had to come out I decided to swap in a new Denso radiator while in there..Your video helped alot with that job..Now I'm gathering the rest of the parts to due your PCV mod since it get cold in Kentucky and I've found the crud underneath my oil cap and in the filler tube..Also fot all the parts too do the hydraulic lash adjusters swap along with new VCG's...Was wondering if your running oils High in Zinc for the Hydraulic tappets and if so what brands ?

Great video as always, been following your 4.7 videos from the beginning and it’s helped me so much the 4.7 is over looked it can rev high retaining smoothness and a balanced power band. I imagine you are going to swap an HO version into yours for the stronger internals, higher compression, and more tune ability with the knock sensors. But my question is have you ever thought of putting a Hemi in, I know it’s a large undertaking but with you style of crystal clear videos the WJ community would be extremely grateful! Thank you for your hard work and innovative modifications and willingness to share it you have made my 4.7 Jeep and many others better.

I did this to my 04 and added a catch can also. I live in Michigan, not a trace of condensation on the filler cap all winter. I just blocked the original hole in the filler. I ran a tube from the resonator box to the pass side head, works perfect.

rebuilding my wj and martin videos always give me hints to what i am missing. Much appreciated

Awesome insight that you have going on there. I have been having issues finding anything that would show me how any of these things go together on this '06 4.7 Mitsubishi Raider that I purchased recently. Videos that I would find on the same truck and year would all have different engines from the one that is in my truck. But thankfully I came across your videos which extremely helpful. I hope I fine more of you're video's that continue to cover this elusive engine that no one seems to have. Thank you for your hard work and sharing with us

My 04 4.7L WJ is dripping oil right onto the one catalytic converter. I heard the pcv hose leaks where it connects to the nipples in the back of the heads. This video helps me a lot. Thanks Martin!

The multiple vacuum connections and T fitting on the crankcase system always confused me. This engine stand view really helped clarify what Jeep did thanks!

Great video! Sooo awesome that you have so many 4.7 videos for us. Especially us junkyard crawlers specifically!! I think I'm just gonna pipe mine together in the rear of the intake and us the none PCV oil fill. Appreciate you sharing your knowledge!

Thanks Martin i got 03 4.7 Durango same problem with the crankcase breather system iam going to fix mine . Ur the most experienced I've been watching ur videos .

I've been watching a lot of videos you like one of the best mechanics I've seen

Martin--the oil neck pc valve and pipe can be cut off with a hack saw and cleaned up with a file and sand papered to a nice finish. Then take a 25/64th plastic trim plug with some silicone sealer on and around the shank, press plug in hole and it looks like it was made that way. It takes 15 minutes and it is easy and cheap.

Oh man you just made my lift so much easier!!! Thank you for showing on an engine that's NOT in a car. It's so hard to see what other people are doing back there on their videos. #NotAllHeroesWearCapes

Thanks again Martin for another how/why video. As I am planning a 2000 Dakota build I have made a "How to" folder in my favorites. Guess who dominates that folder!!! :-D

I must have lucked out cause the 4.7 in my 06 Dakota has that set up with the pcv valve on the rear of the cylinder bank and the breather hose routed that way. Great video!

Hi, I just found your vid. great how to. I live in southern Ontario Canada. i just bought a 2005 dakota with less than 97,000klm on it. 3.7 l engine. it must have sat for sometime before i bought it. I went to check the oil , looks great & clean. i looked under the oil cap and there is water and milk. It scared the crap outa me thinking head gasket... i havnt looked at the rad cap yet either. the antifreeze is low but i havnt topped it up to see if its losing any yet. Gotta wait til the stores open tomorrow the buy antifreeze and tune up parts. plugs filters etc.. I am also going to look in the cylinders when i change the plugs , I hope I dont see any moisture on them. fun stuff..

Hello Martin good info thanks alot

Martin Thanks! I am enjoying your great video. And I am following you step by step.

Perfect job Mártin,,,,,,,Thank you...more videos to learn.....please!!!

Nice job, thanks. 👍

Sphecter hose works as well. Upgraded hoses work just as well.

Great as always

Mine has two filters, one small plastic box inside the intake that contains a fiber filter element soaked in oil and a metal crank case breather cap with another filter element inside it. Chryslers manual dictates that these two filters are to be cleaned with paint thinner or other solvents and re-oiled with fresh oil every time you do an oil change. Thats on the passenger side (right) side valve cover/cold air intake. On the drivers (left) side is the (P)ositive (C)rankcase (V)entilation valve, Chryslers manual dictates to test the valve function making sure the (1 way) flow regulator inside it can move freely. They go on further to say if stuck or damaged (DO NOT ATTEMPT TO CLEAN AND RE-INSTAL) they said it must be replaced. This is for an engine built at Mound Road Engine plant, (OCT 5 88) As stamped in the Iron. Anywho, thats what I do... and It works fine, no water in the system... No freezing or locking up ever. So Chrysler seems to have solved the problem 20 years before the problem.

Wow, thanks man! I was watching a video on doing the timing and this happened to be up next and it was exactly what I needed! I just checked my oil and had yellow stuff on the oil fill tube cover and was freaking out! Now I know why it's doing that and how to fix it. Edit. Wait a second the Dodge Durango one doesn't have anything coming out of the oil fill tube?? So what do I do with the line I pull out of my jeep? You said I could either get one of those or do what you just did here.... So I need both then? Hopefully my question is clear enough. Thanks for your time man. Much appreciated

Thank's brother...greath job

Hello Martin, excellent video and explanation. I was wondering if you can keep the original pcv line from the oil filler port and add another from the cylinder head, as you explain in the video? Is it compatible to have 2 pcv?

Great video!

Hey Martin Love ur videos I have a question Tha 19mm fitting that u removed Would u happen to know tha thread pitch size Thanx

Hey Martin Love ur videos On ur new pvc valve What size is that fitting that goes in tha rear cylinder

Sorry to be commenting so suddenly and so much on all of your videos with so many questions...I have learned so much from your videos...thankfully you at VERY good at explaining and showing... My question here is your new "pvc" valve...(heh...heh...) What year was that from? Because mine is a 2000 and all I can find is the plastic one up front and crank case breathers in the back...

Appreciate your videos. The lnk to the TSS is coming up to 504 Gateway Timeout. Would you have a more recent or up to date link to the TSB?

Martin great video thanks a lot but let me ask you some I have a 2002 dodge 1500 4.7 and it’s using so much oil I replaced the Pcv valve and doing better but still using to much oil could this set up help me with the usage

Great video

Another great video. I have mine going into the suction side (Inlet) of my Blower but I want to get those other style PCV Valves you showed. I haven't done much with the 4.7 in years considering mine sits a lot anymore. What did those come out of a Durango?

Hey Martin, great videos sir! Is it possible to see smoke leaking during my evap vacuum leak testing from the left side of the throttle body of my 2006 Jeep grand Cherokee Laredo 3.7l. I’m seeing a leak coming from the throttle cable spring area ? Is that even possible to have the shaft leak ?

New to your channel. Really like your videos. I just bought an '04 Jeep Grand Cherokee Limited with the 4.7 about 2 weeks ago. When I bought it, the oil looked clean on the dipstick and at the correct level. I maybe drove 300 miles in a week before I decided to change the oil the following weekend after purchasing. Only 3 quarts of oil drained out. I don't see any sludge under the filler cap. I am seeing wetness underneath at the back of the engine. It doesn't smoke at all. There is a smell of burnt oil after driving, but I'm sure it's coming from that leak at the back of the engine because it drips onto the exhaust. My question is, was wondering if the PCV valve and breather update would help this oil consumption? Or do you think I have another issue. I will check out your other videos. Forums I've read seem to suggest this is common for these 4.7s with no actual fix on any of them.

Thnxx thnx

Would that explain the Coolant loss with no Coolant in the oil, I have a 2004 jeep grand Cherokee mile reservoir tank is empty in the morning along with the sludge in the oil cap my dipstick is clean oil filter is clean and no white smoke no bubbling radiator no bubbling tank and I don’t know where the coolant is going could this be possible

Will the 08+ valve cover only. Just the baffled cover. fit on the first gen cylinder head ??? I did this update and I started consuming twice as much oil. And I’ve narrowed it down too slight over pressure and just excess oil pick up from valve cover. So the baffled 08+ it’s pretty necessary at least if you’re putting heavier loads on the vehicle….

hey martin i like your tutorials you do a awesome job. i have a question .i rebuild a engine 4.7 HO from a 2002 jeep grand cherokee,it turned on great but white smoke comes out from the bottom of the manifold and the oil get really hot ?any advice or suggestion please.God bless you

Hi, I have a question for you. I have a 2003 jeep grand Cherokee 4.7 L V8 I’ve replaced the lifters and rocker and replace spark, plugs or new. Can you help please?

Can anyone explain why the setup shown has issues, vs other manufacturers? Is there some vapor going somewhere that it shouldn't?

Would this work on 2002 jeep liberty with the 3.7? I don't see why it wouldn't but want to be sure and if I am missing the plastic piece with the arrow on the driver side (bank 1) would it be OK or is it possible that can cause damage running without that piece?

Could you use two of the new style pcv valves and vent to atmosphere using small cone filter? Or does it require a vacuum source to pull crank case gasses?

So in all reality I should be okay with just deleting the pcv tube and closing both ports off as I utilize the intake tube from factory still on my intake?

Hi Martin, Great video. I am a new follower and a big fan. I have a couple of questions: Which way does the air flow from the right cylinder head? If it flows from the resonator/airbox to the cylinder head, should the 5/8" to 1/2" CCV breather valve be reversed or removed? And, would a wider diameter hose improve or diminish the system? You mentioned that the 53032925AC PCV Valve is 5/8", but the product detail says it is 3/4". Maybe it does not make a big difference for the hoses, but though I would mention it since I am trying to complete this project myself with the inclusion of an oil catch can. Let me know how the heater hoses worked out, I heard they have a tendency to collapse when under high heat. Thanks again!!

Hey Martin, another great video thanks, for some reason just found it now and did not see it before. The question I have related to the PCV system, is there a reason why you would not install an oil catch can on the 4.7? Would that not help with the carbon buildup on the valves? TIA!

Greetings from Russia. Please tell me the reasons for getting oil into the air (engine 4.7 EVA) resonator (there is little oil, but it is). Is it possible to clean the PSV valve (the principle of operation is elementary and there is nothing complicated) or is it only necessary to replace it? With temperature fluctuations, I also encountered a sticking of the idle motor. Thank you for the video.

Excellent work as usual, Could you tell me is the oil catch can good idea for wj overland 2004

The link to the tsb you provided does not work can you repost it?

I have oil under my filler cap but nowhere else do I need to do all of this as I'm pretty sure the build up is from my gf driving to her job three blocks away without letting it warm up fully

Thanks for your in detail info. Question I have a 12 Jeep Liberty and oil leaking from bottom of timing cover. Any ideas

Hey martin i have another quick question for you brother. So my 3.7l v6 has a issue where she shakes a little during idle. She has new spark plugs, IAC valve, intake manifold gaskets, and TPS sensor. I cleaned the throttle body spotless but she shakes and shes supposed to be getting around 20mpg average but im getting 13 to 14mpg. No codes stored in ECU. My buddy thinks it may be solved by replacing the vapor canister as the engine doesnt have egr. Whats your professional opinion?

Always wondered does the pcv valve have to be on the left side? Saves on some of the routing if it doesnt matter.

Can someone provide the part number for the 34611 breather hose pls?

So Martin this takes care of the white sludge build up that forms on the inside of the filler tube?

Does this fix the sludge buildup in the oil fill tube Or would simply replacing the PCV valve fix that I've noticed white sludge in my oil fill tube the last two Winters.

Do you know which way you turn the PCV valve on the 3.7 motor it may turn towards the front but I can't really tell as you stated it's so crowded in there, I don't want to break it off like the other guy did in your other video

pvc... :| ..pcv.. loved the black and white edit :')

Could that pvc.pcv valve arrangement be used on a 06 liberty with a 3.7l??

The link to the Chrysler forum won’t open

What would happen if the all 3 filler neck, left head and right head lines just went to vaccum behind the manifold would that work as well? The positive crank pressure thay used to come from the filler tube can be drawn from the left head as well? Only the left or right too?

Anyone found any complete pcv rebulid kit somewhere?

the link to the tsb would not work for me. i have a 2005 jeep liberty with the 3.7l v-6, is this an issue with it as well?

Hi Martin, do you know whether the water condensation may be affected by exchanging an old oil filter cap?

Im so confused because i have a 3.7 in my mitsubishi. The pvc is on the oil filler neck which on your video of the engine on a engine stand also had. So is it ok to do this same set up and have two pcv valves while eliminating one of the breather element check valves?

Martin, can you somehow send me the location for all of the breather vents on a 2004 JGC WJ 4.0. I am not sure what part even has a vent and where they might all be at. I've been searching online for days. I just can't seem to find what I'm looking for.. Mainly, at all I just want to find a vent for my transmission. I have verified all tubes coming off of the transmission and none are a breather hose. I know where the vent is for the transaxle. I would be forever grateful and in your debt.

Would this work for my 2001 4.7l dodge dakota ?

Hey Martin, I plan on installing a catch can, but there is not a lot of room in the engine bay with the 4.7l. I would mount it near the brake booster in that corner, but I recently did the WJ to ZJ wiper fluid reservoir relocation to that corner. The only spot that really leaves me enough room to untwist the canister for draining is right next to the tube that runs from the air filter to the manifold. However there isn't anywhere to mount it. Do you have any ideas or suggestions? Thanks, Tyler

I think im gonna put a catch can on the 3.7l i justin bought. Seems to be usung oil

Martin, doing some work to my 4.7l HO today, (new radiator, water pump, t-stat, valve covers and lifters) and broke the PCV hose with the 90 degree tee near the rear when trying to get valve cover off. I was thinking of going to autoparts store and getting heater hose tee's. Do you think that will work as a substitute? The tee broke right off the elbow so there is no repairing it. It also seems they sell vacuum tubing elbows and connectors. I might just re-do all the hose with emissions lines because the plastic is brittle and seems to break easily. Would this be an issues replacing the plastic hard-lines with the softer emissions lines they sell? Thanks

Do You need the breahter valve between de cylinder head and the resonator? I watched de 4.7 on the 2007 wk and it only has the new style pcv valve from one head to the intake manifold and a straight hose from the other head to the air box.

Do I need to put gasket sealer on the Timing cover gasket of a 2002 4.7?

I think I need to get my durango running and go re-engineer somethings on it at the Junk yard.

Looking for the part number for the new style pcv

Do you know anything about the revised pcv hose parts dodge came out with to reroute and fix this problem

I know this is seperate from the video.. I have a 2005 Dodge Ram 1500 with the 4.7. Where is the Transmission controle modul located? My truck randomly kicks out of overdrive and gets stuck in two gears. It don’t do it all the time, and clearing the code on my CEL helps.

Hi, please how is it actually with that yellow sludge.Does that remake really reduce sludge creation? Maybye it creates regardless and instead of leaking in oil fill tube it leaks right in heads.I mean when is it so helpful to engine, why is not like that right from factory ?

I live in Norther New Jersey. I have a 2009 4.7 Chrysler Aspen. I just had the oil changed after 3,000 miles and the oil filter was filled to the top with what looked like clear fresh water. About 2 weeks ago the oil light came on and the engine shut off and the temps were below freeaing. It ran again after it got warmer. Is it possible to get that much fresh water in the oil? I do let the vehicle sit a lot, for 1 or 2 weeks at a time between usages..

I have a 2000 Dakota with a 4.7 how hard would it be to put a 5.9 and make it smog legal? Any tips would be appreciated thank you

i have an o2 dakota 4.7l do i need to replace my pcv valves if so with what out of? thank you

So what do you do with the passenger side hose if you dont have an air box? I only have a 3" intake tube thats only about 7" long. Just vent to atmosphere with a filter?

What I really dislike about this entire crankcase ventilation system is the fact that oil-laden blowby fumes, carrying lots of gunk, get passed directly into either the air resonator or the intake manifold, grossly filthing up the pathway. Just take a peak at the backside of the throttle plate, or, with throttle body removed, wipe a clean towel inside the air box inlet to see the filth. And we know cleaning the intake for a new build is such a filthy chore, even with a lint lizard brush and solvent tank, much detergent, much air, as that filth is everywhere inside the intake. Just wants me to add an old-style "breather tube", hanging down beside the block, sometimes.

Hey Martin I got a question i'm hoping you might be able to help out with. I plan on installing on my 4.7l HO an oil catch can to see how much oil the ventilation system has running through it. What would be the best way to route it? Where would I have the inlet come from and outlet go to? Thanks

Martin why not put the pvc on the other right side of the head, leave the left side alone.

Hi, what would be the cause of coolant leaking above the starter? 2001 Jeep Grand Cherokee Limited, non-HO 4.7 V8. I thought it was the freeze plugs behind the engine, but the ones on the side of the block and behind the heads are not leaking. Heater hoses are dry on the firewall and nothing leaking on the reservoir tank or hose. Any thoughts on this?? Thanks in advance :D

Where would you install an oil catch can?

What about a 4.7 Powertech motor on a 2001 Dodge Durango

Would this work for my 04 Dodge ram 1500 3.7L? I have this exact problem!

Just discovered this TSB and have done some research, with this video being a big help. I saw in a couple threads where people were adding catch cans, and it seems like a good idea with the 4.7 having sludge issues in colder areas like I'm in. I'm wondering if you have an opinion on adding a catch can?

Just tell everyone to buy the new hoses before they start. I did this a year or so ago and found the hoses we all rotted. It’s even funnier because it all started with wanting to clean my throttle body.

dont you think an oil catch can is it worth do add?

Martin whay you don't use oil Catch can.I used in my dodge dakota it work fine is much better.

Where/why does it freeze up with the crossover installed?

hit it twice bwahahaha good one always like your videos

I did this and I have a horrible vacuum noise in my air box. Do I possibly have the valve backwards?

I don't fully understand how this helps to cure the sludge problem.

The access to that rear PCV port is impossible without taking the top end apart..

Hit the thumbs down twice...hahaha! Question. This was a good vid, as are all of yours. I have an 04 GC Special Edition. I got it 3 years ago with 78k on the clock. My wife loves it. She drives it instead of her new '19 GC. Go figure. Anyways, at 8:00, where did you get that valve? And do I need that. I'm going to do this mod, and I came by watching this vid because last night I was changing spark plugs, and when trying to move the PVC...lol, PCV tube, I broke the part that goes to the oil filler. I was looking on the web for a way to disconnect it, and couldn't find anything. I saw your vid, and am going to get rid of it altogether. Thanks Martin

Thumbs up for sure but am I the only 1 lost at 7:48 please help😌