oil in air box

[slingblade]

i have an 88 4.0 that is blowing oil thru the front tube that come from the valve cover (cant think of what they are called right know) to the air box the tubes have been replaced once but is still soaking my air filter was do any of yall know why it would do this and or how to fix it am
i have thought about an after market intake but by looking at them instead of blowing on the filter it looks more direct to the thottle body and i dont think that would be a good trade thanx in advance

[MogifiedXJ]

i have an 88 4.0 that is blowing oil thru the front tube that come from the valve cover (cant think of what they are called right know) to the air box the tubes have been replaced once but is still soaking my air filter was do any of yall know why it would do this and or how to fix it am
i have thought about an after market intake but by looking at them instead of blowing on the filter it looks more direct to the thottle body and i dont think that would be a good trade thanx in advance
Your rear ccv is clogged up. Take it off and try to clean it out or buy another one from the stealership. It's A in the pic below...

http://www.madxj.com/MADXJ/technical/technicalfiles/JAvalveCover/images/JeffsValveCover01.jpg

[slingblade]

really appriciate (sp) it im hopin to i can clean it cost over 100 from the stealership

[bewilderedbeast]

Over $100? Man. I bought the rear assembly a few years ago from the dealer for about $20.

[slingblade]

well let me take that back might have been the front one but one of the 2 is over 100 its been 7 or 8 years ago for the rear one 3 to 4 years for the front one that is last time they where changed plus i over guess $ to anyone execpt to my wife then i under guess and come to think of it the tubes on mine look different then the ones in the pic

[1993 Red XJ]

http://www.madxj.com/MADXJ/technical/technicalfiles/JAvalveCover/images/JeffsValveCover01.jpg
Here are the part numbers and costs for the parts used:
1993 rear ccv fitting that goes into the valve cover (1/4 turn twist lock) 53030492
$4.10
2000 rear tube from ccv fitting 4854265
$8.45
2000 rear intake manifold fitting4854194
$4.10
1993 front breather fitting that goes into the valve cover (1/4 turn twist lock)53006239
$7.50
1993 front hose to air box53030591
$2.70
Total:
$26.85
Does anyone know what part numbers came from? I went to AUtozone, Napa, and called the dealership and these part numbers don't match up!!
Please Help!!

[bewilderedbeast]

I started getting a little seepage of oil from the front fitting, so I took the rear one off the valve cover and shot some throttle body cleaner through the hose, with the other end still attached, and the engine on. I also arpayed it liberally around the orifice in the fitting. Did that for a while, then killed the engine, took the thing off completely, and shot some more through it. It came out clean from the other end, so I think it's clean again, and there should be no more seeping oil for a while. I've never had it so bad that oil gets in the airbox.

[suthernoutlaw]

my 91 4.0 goes through about a quart a day. mine wasnt clogged it works fine, wish i knew what it could be........

[Saudade]

You should check your compression.

The CCV provides a vacuum source to draw crankcase fumes into the intake manifold to reduce emissions. The tube to the aircleaner allows fresh, filtered air to enter the head and block. If the CCV is clogged then the fumes and oil can backflow into the airbox. This can easily be fixed by cleaning/replacing the CCV tube. Ofter, removing the valve cover and cleaning all the gunk out from inside helps too. There are MANY threads on this.

However, if your compression is bad, then combustion gases escape past the rings and can "over pressure" the block and blow out through the tube as well. The only way to deal with this is to replace the rings.

Some have chosen to deal with it by placing a "catch can" in the tube to the aircleaner. It traps the oil and allow you to drain it when it gets full.

Here's link to another jeep forums that show what one guy did.

http://www.jeepforum.com/forum/showthread.php?t=145703

[HogWash]

Over $100? Man. I bought the rear assembly a few years ago from the dealer for about $20.
Some one must work for one of them so called stealerships(no selling points here!)!!!1

[HogWash]

my 91 4.0 goes through about a quart a day. mine wasnt clogged it works fine, wish i knew what it could be........
RUN SOME SEAFOAM!!! its like my Bible.It should slow it down if not stop it.