While cleaning up under the hood, I took off the air intake tube and noticed it has a build up of oily dirt. Why would I be getting this from the crankcase vent?
Why is there oil and dirt in my intake tube?
- Thread starter Mikey Mike
- Start date
MountaineerTom
LJ Enthusiast, Retired USAF Weapons Loader
Supporting Member
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Do you have a K&N, or similar brand, reusable air filter? Those get oiled and are known to cause oily intakes and throttle bodies.
All you can do is clean the tube, the box, the throttle body, MAP sensor, et al and get a new filter.
JKP
TJ Addict
Your rear CCV elbow with a small orifice may be clogged. It is connected to the intake manifold vacuum and pulls the vapors into the intake. If clogged, the vapors can be forced out the front CCV elbow into the fresh air intake.
I think the same can happen if somebody goes for a drive without putting the oil cap back on.
Normally, the air stream should run from airbox through front pcv, through the valve cover to flush out the vapors, then out the rear pcv elbow, into the manifold to get burned away ok combustion.
Start the engine with no oil cap and air gets sucked in through the oil cap, backward out the front elbow and into the airbox, carrying oily vapors with it.
Good post- job one with a new to you rig is find out what you have.
Don’t think it is falling apart and don’t assume everything is rock solid either- be aware, cognitive.
Everyone I deal with schools me, makes me challenge assumptions, tricks me or stumps me. Wait, what are we talking about? Oh jeeps, not women.
I'm thinking more along the lines of what another owner may have done to cause the issue.
Jeep, women…. What’s the difference… both empty your wallet and get their way!