Can your Gladiator handle an 18 degree climb without billowing white smoke?

[PW Herman]

My nicely built 2020 Rubicon JT 3.6 can’t make it up any long moderately steep inclines without gulping oil through the pvc and dumping it into the intake manifold. More white smoke than you can imagine, and loss of power half way up a climb. The only way out is a lot of throttle to keep intake vacuum below 12”in.HG or so and eventually the smoke thins out and goes away. Afterward there is always oil in the PCV tube at the intake. On really steep climbs I’ll even get oil dripping out the exhaust clamp between the resonator and muffler.

I just got this truck and can’t understand if this happens to everyone or just a select few. 50k miles and runs/performs flawlessly otherwise. No CELs or codes. No wind coming out of the oil filler hole. I have 2 more weeks on a dealer warranty.

I installed a new Mopar PCV valve and that didn’t help. I installed the Teraflex CCV system and oil still gets past their check valve and into the intake. I imagine a catch can from UPR could help, but my larger concern is why I have this issue in the first place when so many of you probably don’t. There are paved hills in San Francisco steeper than 18 degrees that Corollas tackle with ease

Does this happen to most or just some 3.6 owners?
Are there other systems I can check that could be causing this?

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[pokey02]

I had this issue with my 2 door 2019 JLR. I had no issues otherwise ...just steep climbs. Lots and lots of white smoke while doing steep climbs. Some other folks had the same issue - check out the jlwranglerforum, if you haven't already.

I was told it was a manufacturing issue with the 3.6L. Didnt really try to find a solution since I'm in Florida and there is nothing steep here. Only happened to me when I went out of state to wheel.

Heres the thread from the other forum where I asked if anyone else had an issue.
https://www.jlwranglerforums.com/forum/threads/3-6l-burns-oil-on-steep-inclines.80135/

 

[HorsesRear]

A catch can is not going to solve anything.

 

[willys 41]

My nicely built 2020 Rubicon JT 3.6 can’t make it up any long moderately steep inclines without gulping oil through the pvc and dumping it into the intake manifold. More white smoke than you can imagine, and loss of power half way up a climb. The only way out is a lot of throttle to keep intake vacuum below 12”in.HG or so and eventually the smoke thins out and goes away. Afterward there is always oil in the PCV tube at the intake. On really steep climbs I’ll even get oil dripping out the exhaust clamp between the resonator and muffler.

I just got this truck and can’t understand if this happens to everyone or just a select few. 50k miles and runs/performs flawlessly otherwise. No CELs or codes. No wind coming out of the oil filler hole. I have 2 more weeks on a dealer warranty.

I installed a new Mopar PCV valve and that didn’t help. I installed the Teraflex CCV system and oil still gets past their check valve and into the intake. I imagine a catch can from UPR could help, but my larger concern is why I have this issue in the first place when so many of you probably don’t. There are paved hills in San Francisco steeper than 18 degrees that Corollas tackle with ease

Does this happen to most or just some 3.6 owners?
Are there other systems I can check that could be causing this?

I have a 2020 Willys with a 3.6 and have never had this problem.
The UPR has worked for me with some important modification that should be done to all catch cans.
My UPR has a 4ft x 1/2 drain hose with a ball valve at the end witch doubles its capacity.
After installing the drain hose I have checked the can for oil and there is never any oil in the can its all in the hose keeping it out of the intake. I drain it every 1000 miles.
I did have to make a bracket to raze the can up higher to fit the drain hose.
Maybe a setup like this will help.

 

[willys 41]

My nicely built 2020 Rubicon JT 3.6 can’t make it up any long moderately steep inclines without gulping oil through the pvc and dumping it into the intake manifold. More white smoke than you can imagine, and loss of power half way up a climb. The only way out is a lot of throttle to keep intake vacuum below 12”in.HG or so and eventually the smoke thins out and goes away. Afterward there is always oil in the PCV tube at the intake. On really steep climbs I’ll even get oil dripping out the exhaust clamp between the resonator and muffler.

I just got this truck and can’t understand if this happens to everyone or just a select few. 50k miles and runs/performs flawlessly otherwise. No CELs or codes. No wind coming out of the oil filler hole. I have 2 more weeks on a dealer warranty.

I installed a new Mopar PCV valve and that didn’t help. I installed the Teraflex CCV system and oil still gets past their check valve and into the intake. I imagine a catch can from UPR could help, but my larger concern is why I have this issue in the first place when so many of you probably don’t. There are paved hills in San Francisco steeper than 18 degrees that Corollas tackle with ease

Does this happen to most or just some 3.6 owners?
Are there other systems I can check that could be causing this?

One more thing.
I also replaced the PCV valve with the updated one and checked to see if the can collected less oil.
No difference. Before and after the new valve the amount of oil collected was the same.

 

[BearFootSam]

19- & 20-degree climbs and I haven't had that issue whatsoever. Jeep supposedly adapted the 3.6 for the Wrangler/Gladiator to improve oiling at high angles. The oil sump for one I've read has a modified shape to prevent oil starvation at extreme angles. If this was a design issue then everyone going to moab and such would be complaining of it.

 

[PW Herman]

I had this issue with my 2 door 2019 JLR. I had no issues otherwise ...just steep climbs. Lots and lots of white smoke while doing steep climbs. Some other folks had the same issue - check out the jlwranglerforum, if you haven't already.

I was told it was a manufacturing issue with the 3.6L. Didnt really try to find a solution since I'm in Florida and there is nothing steep here. Only happened to me when I went out of state to wheel.

Heres the thread from the other forum where I asked if anyone else had an issue.
https://www.jlwranglerforums.com/forum/threads/3-6l-burns-oil-on-steep-inclines.80135/

Thanks, I found the thread you attached when first researching this- it prompted me to get the Teraflex system. Somehow I’m still having the issue and need to figure out the source.

 

[DiehardTory]

NOT an Issue

A catch can is not going to solve anything.

WHY? What is the foundation for this conclusion?

 

[HorsesRear]

NOT an Issue


WHY? What is the foundation for this conclusion?

Isn't it weird how ALL those engineers from ALL those car companies always seem to forget to include a catch can in their design?

 

[willys 41]

Isn't it weird how ALL those engineers from ALL those car companies always seem to forget to include a catch can in their design?

Some do.

https://accessories.ford.com/5-0l-5...777986!!20643481100!157311292289&gad_source=1

https://accessories.ford.com/27l-ec...777986!!20643481100!157311292289&gad_source=1

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