Hey all, so Gloeck.45 and I are wanting to add catchcan to our '13 JKs. We searched for hours last night, and couldn't find any clear leads to how anything is to be routed on the JK. I have some experience after installing one on my Buell XB12 (HD v twin 1200 - easy and simple), however the JK is stumping us. Below I have a few doodles, but I'm not sure if I'm correct with the setup on the JK. The squiggly lines represent the factory lines, and solid lines represent the rerouted lines.

Notice on my bike, I didn't run one line back to the airbox, I added a small breather on the end.





Would this be the correct setup on the JK, or am I missing something?

 

What are you trying to do here. It appears this is the function of the PCV (Positive crankcase ventilation valve) a catch can is not needed on our engines. Bike engines are much different than your typical car engine and operate at much higher rpms and compression ratios so what works for them doesn't translate to us.

 

The goal is to filter out the fine oil, and unburned gas particles in the air that would be recirculated back through your intake, leaving only "clean" air to be sucked into your engine. There really isn't a big difference, every engine does the same basic functions. After having one on my bike, I was amazed at how much "gunk" my catch can prevented from being sucked back through my intake.

My question for the JK is do I have the routing correct?

 

You have taken a really simple mod and complicated it. All you need to do is remove the pcv tube and add in your own hose with catchcan in the middle. Leave the crankcase vent hose where it is as it is as it is a suction point not a blowout point. The motor will suck in air at the crankcase vent and blow it back out the pcv side. I recomend an aluminum can alot larger than that with a releif port on the bottom. Drain can and check hoses during oil changes and you should be good to go.

This one is a little expensive, but you get the idea.

 

Thank you so much! I knew there was something I wasn't quite grasping!

 

No problem. I figured you wouldn't find much on here for this mod as most vehicles that you'd put a catch can on would be high compression. The Pentastar definatly fits that mold. I am surprissed someone like RIPP Superchargers doesn't have one. Have you checked the Supercharger/Turbo Jeep vendors to see if they offer one?

 

Like I said, my buddy Gloeck.45 brought it up and since I did it on my bike, I have a good idea on how they function and how you really do SEE the results. We will probably just do a DIY rather than buy a kit.

 

That's what I used on my Challenger Hemi but I don't think the Pentastar would need one. Have you seen evidence of much oil in the intake?

On the Hemi, my Moroso catch can would scavenge about half a pint of oil every 3k but the Hemi was kinda notorious for that and the stock intake had a flat section where oil would accumulate so it needed it. I've not heard of a need for one on Pentastars.

 

I haven't seen any oil but a wise man once said, better to have it and not need it, than need it and not have it.

 

Here's a pretty good explanation of what catch cans do:

Oil Catch Cans – What You Should Know – How They Work | The Torque Post

And this is the continuation, but it explains why a lot of catch cans are useless unless they have the right media/baffles inside to catch the oil:

Oil Catch Cans – What You Should Know – How To Choose, Buy & Build | The Torque Post

Just thought it was interesting and wanted to share.

I think I would like to build/modify my own can for my JK that way there's no guessing on what may or may not be inside.