ok most comonly this problem occurs in the bigger motors i have the four banger with close to 200000 miles and oil is blowing out of the pcv valve i removed the pcv valve and replaced it and the grommet understanding that vacum is everything on these motors ive been careful this jeep is new to me and im guessing the oil wasnt changed frequently but my question is does anyone think it is necessary to remove the valve cover to clean out something or i read a previous post on the 4.0l about spraying fuel injector cleaner in the pcv hole after removing it i cant see this working but please if there are any gear heads who can help im losing a quart every fill up i have a haynes manual if you can suggest what and where to clean out im assuming its under the valve cover but where and what thank you for any input and if im floggin a dead horse i appologize id just feal better if someone addressed me directly <img src="/forums/images/graemlins/zombie.gif" alt="" />

oil blow by on 2.5l single choice
	coil spring
	leaf springs
Votes accepted starting: 07/08/07 09:08 AM
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Jes if you have TWO hoses going into the valve cover one of them is for clean air into the engine and the other should be the pcv. BOTH hoses need to be taken off and reamed out and cleaned inside as either may have crud in them stopping the air flow.
The most common visable leak from blowby is the rear main seal. Small amounts in the aircleaner are usuall from the hoses or pcv.
In bad blowby cases I have taken out the pcv and connected BOTH valve cover hoses to positive vacuume.. This has stopped oil leaks for me in the past.
Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" />

Yeah it is! Have you checked to make sure that you are losing oil from just PCV filter?. A quart seems like a lot to lose from just blow-by through the PCV.

yeah there are no ther leaks since ive replaced the grommet it is losing much less oil seems oil was spraying from grommet it seems to be quite moist know in fact wet with oil around the dip stick i only have onhe hole on valve cover opposed to two ive cleaned the hoses and new pcv valve im wondering if it is gonna take me removing valve cover or not thanks for advice guys but im still oily

you have 200,000 miles on that thing, ever think some oil might be getting burned up, bad valve seals? piston slap? try using 10w-40 next time

That is one I'd take the pcv out of and hook it to positive vac..right away.
Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" />

bigjim whats the best way without oiling up my air cleaner. im burning some oil but not a lot im not blowing smoke outa my exhaust even when i down shift and am tring too again thanks for the thought but bigjim I had the hose which is now running to the street but i did connect it to my air cleaner and damn was that i messy situation if theres another way loet me know please and thanks fellas

does anyone think i should remove valve cover and clean oil return slots <holes> the slots under the valve cover that when the oil comes up to lubricate runs down and back inside head, is anyone familiar with this motor the haynes manual doesnt show these slots although they have to be there im assuming there gummed up from not clean thickened oil i was gonna clean them with a pipecleaner or should i pop another hole in valve cover bout three eights wide and put a GROMMET ON IT AND A BREATHER IN IT bigjim unless you have a better idea for the vac idea <img src="/forums/images/graemlins/confused.gif" alt="" /> <img src="/forums/images/graemlins/confused.gif" alt="" />

If it was bothering me I'd hook it directly up to a vac and let the engine burn any oil that gets sucked inside.
Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" />

BIGJIM THANKS A TON I CONNECTED THE HOSE FROM THE PCV TO THE VAC SYSTEM RIGHT INTO THE INTAKE MAN IT EVEN SEEMS TO HAVE GIVEN ME BETTER PEDDLE RESPONSE MIGHT BE JUST IN MY HEAD BUT I WANNA THANK YOU I CAN PARK IN MY FATHERS DRIVE NOW <img src="/forums/images/graemlins/kewl.gif" alt="" /> <img src="/forums/images/graemlins/kewl.gif" alt="" />