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V6 catch can users (MUST READ)

37K views 26 replies 13 participants last post by  Jeff12p 
#1 · (Edited)
In case you don’t want to read though this whole long winded post I will break the information into sections so you can just jump for section to section.

Disclaimer

I want to start out by saying this post if for information purposes, it is not meant start an argument for pros and con of OIL catch cans.
Or whether the 3.6L needs one or not.



BACKGROUND

This past weekend (April 15, 2017 to April 17, 2017) I had the displeasure or removing the upper intake manifold on my Pentastar so that I could replace a broken left motor mount.
Since I had to remove the intake manifold I decided to replace my spark plugs while I was in there ( I have owned the car for over 5 years now and it just hit 34,000 miles, so it wouldn’t hurt)
I also replaced all 6 fuel injectors after the dealership claimed that my slight left cylinder head ticking sound was being caused by an injector(which I knew it was not the cause of the noise but I was not going to let them generate revenue from me just to prove them wrong.) They claimed this had done this for other owners with the same complaint. Long story short tick is still there and I will be fighting with them to honor the cylinder head warranty before it expires on me.



PHOTOS

Sorry I did not take pictures of my upper intake manifold or my throttle body.

Injectors: The tips of the injector were covered in a combination of gritty oily residue, but there was nothing obstructing the nozzles as that portion was clean

Spark plugs: The spark plugs you could see that all the threaded areas of the plugs were consistently coated with motor oil

The plugs that had the highest build up were the #1 and #2 plugs as the intake ports are at the front of the manifold. (Opposite end from the throttle body)

MY SET UP:

I have had a Billet technology OIL catch can installed for almost three years, in mid 2014 I installed a catch can diffuser made by UPR that was designed specifically to fit the BT can. UPR also makes one that fits their can of similar design. The added restriction made the can more effective a removing oil from the intake tract.

I have an aftermarket intake installed: aFe Power Momentum GT intake with a Pro Dry S cone filter.

when installing the My catch can I tried looking for any tech pictures of the PCV system of the Pentastar but couldn't find any that made sense. Well the drawings make perfect sense now.

I even made a drawing for the connection that I made and shared it online.



HERE’s what I found out:
The PENTASTAR use TWO separate PCV valve outputs. There is one for each cylinder bank located at the rear of each cylinder head against the fire wall.

Right PCV output: Injects oil into the intake manifold just behind the throttle body

Left PCV output: Injects oil into the airbox and has to enter the intake manifold through the throttle body

Imagine how Stupid I felt when I realized that all the oil my catch can caught came from only one side of the engine. I felt even worse when I saw how much oil was in my intake tract.

I used CRC Mass Air Flow meter cleaner spray and some rags to clean all the oil from my throttle body. I cleaned the intake tube but there was not much that could do to clean my intake runners.



Summary:

If you are going to run Oil catch cans on your 2011 to 2015 3.6L Pentastar V6 you are going to have to run TWO or you will have to make them share the same catch somehow.


I am going to add a second catch can and when I do I will share pictures and the process of this in this thread.
 

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#2 ·
Interesting discovery..I'm reading other car forums(challenger, charger, and durango) with the same V6 Pentastar engine running a catch can, none of which encountered the problem you're having so far.

Would you think it's still beneficial to run at least one catch can and then eventually add an second catch can later on?
 
#3 · (Edited)
Beezy, My car was running fine before I did the maintenance, the only benefit now it that the idle is rock steady now, sometimes at a light it would sorta bounce around.


I am sure the fact that I am running an aFe Momentum GT intake will help contribute to the the faster accumulation of oil because there are no baffle or resonator chambers to slow down the oil.

Once it enters to intake its a straight shot down to the throttle body.

I live on a small island and do alot of short drives and a lot of uphill and down hill driving so blowby will be more common for my driving conditions.



Beezy to answer your question if I think you can get by with just one?


The apparent answer is NO. If you go to the Mishimoto site you will see some Double catch can set up for the GM turbo V6 and inline fours.

If you are going to do the install do it right and get it over with.

Remeber the plug don't have to be changed until 86000 miles most first owners will never have the plugs changed during their period of owner ship.

No one that knew the PCV system was set up like that ever shared it so that is one of the reasons I wanted to post.



Just of shits and giggle what I will do I take the throttle body off the 2011 I have that does not have a catch can at all and see what it looks like and if it needs to be cleaned,


The 2011 will be the control:

No catch can

OEM intake

And running identical oil to my 2012 (Pennzoil Pure Platinum 5w - 30 full synthetic)

Had it Left cylinder head replace under warranty.

and has even more miles on it than


That may also be may oppurtunity to adds pic.
 
#4 · (Edited)
I have the ripp supercharger installed at 10 psi which obv causes a lot of blo by. I have the volley tech catch can installed on the left hand side of the engine bay. On the right is a ventilation line where oil blo by is pushed out. I think that's what your talking about. I ordered another catch can after seeing all the oil that was coming out of there and dirtying up my engine bay. I currently have a homemade catch installed on it that is doing a great job. This is the line that is supposed to go into the air filter but mine just has a lil vent on it instead cause I have a k and n installed that doesn't have a anywhere for the line to go.


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#14 ·
My RIPP kit is getting installed next month. I'm definitely gonna follow your lead on this one. Do you have any more pictures of your install?

I have the ripp supercharger installed at 10 psi which obv causes a lot of blo by. I have the volley tech catch can installed on the left hand side of the engine bay. On the right is a ventilation line where oil blo by is pushed out. I think that's what your talking about. I ordered another catch can after seeing all the oil that was coming out of there and dirtying up my engine bay. I currently have a homemade catch installed on it that is doing a great job. This is the line that is supposed to go into the air filter but mine just has a lil vent on it instead cause I have a k and n installed that doesn't have a anywhere for the line to go.


Sent from my iPhone using JeepGarage
 
#6 ·
Interesting read.
 
#7 ·
I emailed Alex from billet tech and told him about the dual pcv valves in the pentastar engine. He told me that one is sufficient, and anymore is just for piece of mind. I still ended up ordering a 2nd one. Here is a copy of his email.


Hi Jason

Normally the vehicles only need one catch can if you need more then one your either boosting of sort or you have more power then the motor is suppose to be putting out like a super charger or pro charger of sort. With that being said thank you for the feed back and information you found. Just want to say we are not associated with UPR what so ever they are our competitors that like to use our name for there stuff when in reality we have noting to do them with anything of a defuser or sort isn?t really needed not really sure why that is a thing but if ones wants it it they will get it just not something we provide or

attach to. We have always only used one and was plenty for the vehicle it self anything more is overkill or if your just that type of person that wants to have it just to have it then more power to you.

Thank you for the feedback as well.

Alex C
info@billettechnology.net
Toll Free: 866-747-1684
Phone: 561-582-6171
Show quoted text
 
#24 ·
I emailed Alex from billet tech and told him about the dual pcv valves in the pentastar engine. He told me that one is sufficient, and anymore is just for piece of mind. I still ended up ordering a 2nd one. Here is a copy of his email.


Hi Jason

Normally the vehicles only need one catch can if you need more then one your either boosting of sort or you have more power then the motor is suppose to be putting out like a super charger or pro charger of sort. With that being said thank you for the feed back and information you found. Just want to say we are not associated with UPR what so ever they are our competitors that like to use our name for there stuff when in reality we have noting to do them with anything of a defuser or sort isn?t really needed not really sure why that is a thing but if ones wants it it they will get it just not something we provide or

attach to. We have always only used one and was plenty for the vehicle it self anything more is overkill or if your just that type of person that wants to have it just to have it then more power to you.

Thank you for the feedback as well.

Alex C
info@billettechnology.net
Toll Free: 866-747-1684
Phone: 561-582-6171
Show quoted text
I've got a 02 jeep liberty sport 3.7l v6 5 sp manual, and was having issues with blow by, throttle body always being nasty. Ran like crap after normal running temp. So I bought me a catch can (2 ports in, 1 out, and the option for a little cone breather vent on top or I could plug it). Anyways after running different variations between the pvc on for of motor and the 2 block vents on each side on back.. . So I finally got it to where it wasn't discharging oil out the top breather.. fry pickup on out port. 2 block vents on the 2 in ports and plugged off top port.. runs so much smoother. And got my performance back out of my upgrades.. cold air intake, chip, exaust, better plugs, coils, injectors, cleared my cats out and deleted the 3rd one. And shortened the gear shifter lever by 4in.. not the fastest thing I've driven but definitely better than before. And I just bought a 4.7l throttle body and fixing to install.. .. she's definitely better to drive thro traffic or whatever. Anyways, just buy a 1 in 2 out Port catch can.. wamm.. lol
 
#10 ·
Billet is local for me and still run by simple folk so I'll take things all around with my own grain of salt. I wish someone would come through with a good install pictorial and accurate instructions as this still seems annoying to some. I've avoided installing mine due to my dealer being a pain in the ass.


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#11 · (Edited)
I have been trying to post these pics fir a few days....

The first pic is the upper intake manifold . The orange circle shows where the crank case breather tube connects to the intake.

The second shows the breather tube on the left side.


I am having the hardest time finding photos of the case breather system.


We can't take the word of every vendor because they have no clue about the pentastar. They made parts for their own cars and lucky for us allot of them fit other Mopars.

If you have two leak wouldn't you plug both?

As soon as I get a chancell I will take photoa of the intake tract of the 2011

I
 

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#13 ·
I agree we can't always trust vendors. The thing that got me was, I apporached him as if they should start informing pentastar owners that there are 2 pcv valves, and could gain an extra sale by letting us know that. He responded by telling me we don't really need it. Usually sales people will jump at any opportunity to sell another product.
 
#15 · (Edited)
You can do it with a single catch can but it requires one way check valves to do it. RX racing have something suitable which I used on my 2013 300v6 and it works very well. Basicly you plumb it into the passenger side and provide feeds back to the intake one downstream of the throttle to the stock location and the other feed goes just upstream of the throttle, and leave the stock setup on the drivers side. What this does is provides vacuum to the throttle ahead of the throttle which stops the oil from being pulled from the drivers side, and the bulk of the problem is the passenger feed going to very high vacuum downstream of the throttle which is where most of the oil comes from. RX provides a kit with the valves which are not shown in this picture. I regularly would get about 1/2 to 1 cup of oil saved on my 300 v6 between oil changes, and yes I am one of the believers that they work, I have used something on all my vehicles for the last 20 years. To work properly the separator needs to have baffles and some kind of medium internally for the oil to collect on for those who want to research it look at aircraft engines and the correct search term for them is oil air separator, and no I am not going to get into the endless pros and cons you can decide for yourself.
 

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#16 · (Edited)
Quick question, Would there be any issue with getting one catch can that has 3 ports, one for each crank case and the other to go to the intake? just so we do not have to buy 2 units and take up more space? just trying to be efficient and keep things clean :)

EDIT.... or... I read all the post and notice the latest one mentions exactly what I was thinking. Sorry lol
 
#17 ·
That would work....
 
#19 ·
be aware with billet technology, their website says 20 business days to ship. I still haven't received mine and its been over 30 business days. Ordered 2 catch cans back in april... they didn't even send them out to get painted till 20 business days later. one of their guys emailed me back and said it may take 1-2 months to ship. is that normal? their website says they have a bunch of satin cans sitting, ready to ship. If they are custom and need paint, you can expect a 20 business day turn around. 30+ days later, no change... Also, on the bottom of my order screen it says "NOTE: This order has already shipped or has reached the final stages of processing. Therefore this order is no longer editable." it has said this for 4 weeks now. kind of frustrating ordering a product and expecting a 20 day turn around, and 30+ days later still nothing...
 
#21 ·
In-stock off the shelf items would obviously be shipped out the fastest. For custom orders, customers have waited 1-2 months for their orders just to get shipped out.

I made a custom order of a all matte black set back on 4/18 and still waiting patiently. Matte black run was actually recent, late May to be exact. I already expected to wait at least 2 months. I don't mind the wait as I understand the process of items getting anodized in certain quantities and batches depending on the color is next up to be done.
 
#22 ·
I've had both my catch cans installed on my 3.6L. only one is catching oil. Installed on the pcv side( dumps straight to intake manifold) and the other one dumps into the air intake. The pcv side is the only one actually catching oil. The intake side is dry as a bone. Only one side(pcv side) requires a catch can. Have about 500 miles after install and I've caught a good amount of oil. I'm thinking about running both off of the pcv side and having dual catch cans filtering one side. Or I may just sell the other one. Not sure yet. Long story short.... Only need 1 can. For the pcv side.
 
#26 ·
The pentium is revised. you would have tontrace the PCV lines and figure your area to tap into the piping.
 
#27 ·
I saw a video while doing research today that said the driver's side line that goes to the airbox is an intake line and that he got a whistling noise and may have done damage to his engine by hooking up both sides to the same catch can. I have never seen oil in my airbox and a lot in my intake from the PCV valve on the passenger side so I will only be running one catch can.
 
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