Oil getting into air filter question.

[1996XJ]

I have had oil residue seeping out of where the crank case breather tube connects to the air filter box for a while now. Jeep cleaned it up months ago and said they did something to it and keep to and keep an eye on it. Last oil change, I noticed it was all oily again. Now it's at the dealer. They claim they are replacing the crank case breather tube. Could anyone smarten me up as to if that will actually fix the issue of oil almost making it to my air filter ?(i took the air filter cover off and a small amount is puddling near the filter) Or what is causing the issue on my Sport S in the first place? My mojave never had this issue. I am waiting till they are done to ask them what they actually did and say the problem was. Just curious what you guys might think is going on.
( Edit some reading i just did stated PCV issues or engine wear and damage... which is insane because i would say this was noticed when the truck was brand new but they said not to worry and keep an eye if it came back!)

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[Escape.idiocracy]

I don’t really understand why they would be replacing the crank case breaker tube, unless the end that attaches to the intake just isn’t seating correctly causing leaking/seepage.

Could be a Great excuse to look into a catch can. ?? keep all the crap out of the intake….

 

[1996XJ]

I don’t really understand why they would be replacing the crank case breaker tube, unless the end that attaches to the intake just isn’t seating correctly causing leaking/seepage.

Could be a Great excuse to look into a catch can. ?? keep all the crap out of the intake….

I mean that's why I thought something was fishy. Unless there is some kind of baffle or valve in the tube. Now I am reading it could be a sign of serious engine damage... some one did recommend a catch can to me when I first got the truck.

 

[Lunentucker]

Higher RPM's due to tire size increases?
Steep angle and or off-camber wheeling?
Mileage?
Who does the oil changes? Have you checked the level to make sure it's not over filled?
Has a compression test been done?
Any engine ticking?
have you pulled the plugs to see if they're fouled?

 

[Escape.idiocracy]

https://www.jlwranglerforums.com/fo...l-on-steep-inclines.80135/page-3#post-1956917

If it’s at the dealer right now- see if they can peruse replacing the PCV- hopefully under a warranty/trouble shooting…. Looks to be a pain to access…

 

[1996XJ]

Higher RPM's due to tire size increases?
Steep angle and or off-camber wheeling?
Mileage?
Who does the oil changes? Have you checked the level to make sure it's not over filled?
Has a compression test been done?
Any engine ticking?
have you pulled the plugs to see if they're fouled?

Wheels are 33s. No wheeling to speak of much less hard wheeling. Milage is 21,000. Its my daily driver so mostly freeway, some high rpms to get on the freeway or get over lanes. I would say this was noticed at the first oil change at 5000 miles. At 5k or 10k they cleaned it up, marked the area and said to keep an eye on it, and let them know if it comes back. Jeep has done all the oil changes. As far as compression test and plugs I will ask the dealer if they plan on checking that. In July I had a newborn and a couple trips to children's hospital so I kind of trusted Jeep to handle this if it becomes a real issue. I am open to any suggestions as to what questions I should be asking before I take it back from them.

 

[ShadowsPapa]

Wheels are 33s. No wheeling to speak of much less hard wheeling. Milage is 21,000. Its my daily driver so mostly freeway, some high rpms to get on the freeway or get over lanes. I would say this was noticed at the first oil change at 5000 miles. At 5k or 10k they cleaned it up, marked the area and said to keep an eye on it, and let them know if it comes back. Jeep has done all the oil changes. As far as compression test and plugs I will ask the dealer if they plan on checking that. In July I had a newborn and a couple trips to children's hospital so I kind of trusted Jeep to handle this if it becomes a real issue. I am open to any suggestions as to what questions I should be asking before I take it back from them.

You would have to have it tipped pretty far to cause oil to get into that area.
There simply should be no oil in the upper part of the engine to get that far - IF the PCV is working properly.
There is a TSB for the PCV.
Overfilled isn't going to cause it, either. Thousands of these have run around for miles with 6 quarts - as long as the oil that gets to the cams and followers, etc. can drain back to the crankcase, all oil is way too low to get up that far. Think of how far down in the block the oil sits, and then how far you'd have to tip an engine to make that oil collect in a valve cover.
Oil not draining back due to extreme angles is another thing, but over-fill alone can't do this, otherwise we'd see many thousands of them like this because that's how many are likely to have been sent out from dealers over-filled. Most people take Jeeps in, get their WAVE oil change, and drive out, not checking the oil until they'd normally check it to see that it's not down after a couple thousand miles. Forum members are exceptions - not the norm.

You either have a PCV issue - or - excessive blow-by due to a physical engine problem.
I've seen engines fill the air filter with oil when it gets bad enough, but you'd know that by now as you'd be seeing blue smoke out the back, plugged cat and all that stuff.

 

[1996XJ]

You would have to have it tipped pretty far to cause oil to get into that area.
There simply should be no oil in the upper part of the engine to get that far - IF the PCV is working properly.
There is a TSB for the PCV.
Overfilled isn't going to cause it, either. Thousands of these have run around for miles with 6 quarts - as long as the oil that gets to the cams and followers, etc. can drain back to the crankcase, all oil is way too low to get up that far. Think of how far down in the block the oil sits, and then how far you'd have to tip an engine to make that oil collect in a valve cover.
Oil not draining back due to extreme angles is another thing, but over-fill alone can't do this, otherwise we'd see many thousands of them like this because that's how many are likely to have been sent out from dealers over-filled. Most people take Jeeps in, get their WAVE oil change, and drive out, not checking the oil until they'd normally check it to see that it's not down after a couple thousand miles. Forum members are exceptions - not the norm.

You either have a PCV issue - or - excessive blow-by due to a physical engine problem.
I've seen engines fill the air filter with oil when it gets bad enough, but you'd know that by now as you'd be seeing blue smoke out the back, plugged cat and all that stuff.

Should i let them know that i know the breather tube alone will fix nothing? I will bring up the PCV to them tomorrow. Is there anyway to get the dealer to check for engine issues without any check engine light? I'm guessing I am going to have to take it back with there recommended fix and if there are indeed engine issues the oil will come back then I can get them to maybe look for worse issues?

 

[Lunentucker]

I'm not seeing the aforementioned TSB, but I may not be looking on the right places.
https://www.carcomplaints.com/Jeep/Gladiator/2021/tsbs/

 

[1996XJ]

I'm not seeing the aforementioned TSB, but I may not be looking on the right places.
https://www.carcomplaints.com/Jeep/Gladiator/2021/tsbs/

I am still researching this as well. I found some posts on the forum about it.

https://www.jeepgladiatorforum.com/forum/threads/tsb-09-012-22.72419/

The dealer I purchased from out of state messaged me months ago about a TSB. I contacted my local dealer and they said there was none. I trust Gupton to know instead of my local dealer.

 

[Camaroboi13]

Is your air filter covered in oil? A small amount of oil/vapor will come through the intake and that’s normal via the pcv system, but that’s definitely excessive. Faulty pcv and/or blow by caused by rings is usually the culprit. Unless you have the only 2.0 turbo gladiator out there, I’d let the dealership handle it.

 

[1996XJ]

Is your air filter covered in oil? A small amount of oil/vapor will come through the intake and that’s normal via the pcv system, but that’s definitely excessive. Faulty pcv and/or blow by caused by rings is usually the culprit. Unless you have the only 2.0 turbo gladiator out there, I’d let the dealership handle it.

The filter is still clean but the oil is collecting near the filter if that makes sense. It's dripping out of the breather tube and collecting below. I mean not a lot but it's there. What makes me feel un easy is they act like changing the breather tube is the fix. Unless they just are horrible at communicating. I am going to bring up PCV to them. I will ask how they are going to rule out bigger issues or possible engine damage since they advised me to drive this thing for 15 thousand miles with this issue.
Question for you guys that know engines... if the rings are the issues for whatever reason would new rings fix this or would this amount of milage with said issue cause other damage to the engine? I don't notice any noises, smoke, or running issues. Or if it's just the pcv any chance that caused a more serious issue running it this long with an issue? Thanks again to anyone who chimes in. I don't want to sound totally ignorant if they try changing the breather tube and sending me on my way.

 

[Camaroboi13]

A small sign of rings would be smoke from the exhaust, oil smoke is blue. You can also stick your finger in the exhaust and see if it’s black and full of soot. With that little mileage there shouldn’t be much of anything in there. If the air filter isn’t getting oily then chances are it hasn’t even made it to the engine and would likely confirm the pcv issue.

 

[cmcveay]

My wife had a similar problem with her 2015 JKU so I went through the steps of replacing the PCV valve and then checking all of the other usual suspects with no change. Took it in to the local dealer and a brand new tech figure it out. The insulation mat on the hood! Under hard acceleration, the insulation would get sucked down and obstruct the air inlet for the airbox. That was creating so much vacuum in the intake system that it was pulling oil through the PCV valve. A pair of scissors, 10 minutes and the problem was solved.

 

[1996XJ]

I just got back from rhe dealer. They claim the pcv valve is on the back of the tube? And is being replaced as well. He said something about checking the throttle body. I told him let me know what you end up doing and finding out. I asked him if they will investigate any further as far as possible engine damage causing this. He said they will if basically the problem returns after whatever they decide to do doesn't solve it. Which is what I expected. I'll let you all know what ends up happening.

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