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post #1 of 6 Old 02-19-2002, 11:26 PM Thread Starter
YJ boy
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Join Date: Jan 2002
Location: Dallas
Posts: 27
Oil in airbox

Hello all I am getting alot of oil in my airbox I put new pcv and air return valve? (i think thats what it is called)also all new lines and still there is oil all over the inside of my airbox bad.... why is it getting pushed in there? Please help stop the spillage thanks

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post #2 of 6 Old 02-20-2002, 04:07 PM
Dan's YJ
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Location: Lompoc Calif
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I'd also like to know why it does that. Mine isn't too bad, but enough to make me curious.

1994 Bronco HD
Warn 8000
2"lift, 32x12.50
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post #3 of 6 Old 02-20-2002, 07:21 PM
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2008 JK Wrangler 
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Location: Sunny Florida
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I had the same problem when I bought my YJ. When I replaced my valve cover gasket I cleand the vents inside the cover. I haven't had any problems since. I believe because of the gunk in the vents oil gets pushed up but can't bleed back down. That's why it runs over into the filter box.

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2008 Unlimited Rubicon
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post #4 of 6 Old 02-20-2002, 07:40 PM Thread Starter
YJ boy
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Well I would say that would be the fix but I have a brand new valvecover "plastic one?" but I will see if maybe it could be stoped from ony about 150 miles hope thats it!! thanks
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post #5 of 6 Old 02-20-2002, 09:19 PM
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95 Yj, mine does it too, oh well..

95, 2.5L, custom bumpers, Flow's, 4 inch Skyjacker Super Duty, 33x12.50 MT's, 15X10 AR 767's, Hi-lift, Funk in the Trunk( two 12 inch subs ), soon to be locked and have one of those pully things on the front.

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post #6 of 6 Old 02-22-2002, 11:15 PM
NOVA Jeeper56
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It is said that on yj's 2.5l more that after about 75-80000 miles they start sucking oil through there. I have a 2.5 and thre is no PCV vavle it is just and elbow. I have been told it could be a number of things including lifters,piston rings etc.... If you do have a PCV vavle not and elbow you can take your line off from the intake and put on a air breather to eliminate the oil in the box. But if you only have a elbow you need the line to suck out the pressure

'94yj, rancho lift kit, 31x10.50 BFG mud's,intake,exhaust,wheels, warn 6000lb winch,lights,
bumpers/brush guard
(used to be known as BiggMike56)
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