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4.0L Oil blowing out of dipstick. Need help and queations?

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Old 09-19-2011 | 02:31 PM
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Default 4.0L Oil blowing out of dipstick. Need help and queations?

Oil blowing out of dipstick? I have replaced both of the ccv, oil filter and oil filter housing o-rings. Valve cover and head are clean. Can the oil pump be going out soon? Anyother ideas?

Also what is this above the oil dipstick tube black and with the little tube on top.I pulled it off and its sucking air into it??? (Pic 2)
Attached Thumbnails 4.0L Oil blowing out of dipstick. Need help and queations?-forumrunner_20110919_131306.jpg   4.0L Oil blowing out of dipstick. Need help and queations?-forumrunner_20110919_132624.jpg  
Old 09-19-2011 | 02:49 PM
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The vacuum thingy is your water control valve for the heater.

If you are blowing oil out the dipstick, your crankcase is being pressurized. Could be blowby past the rings.

Or a cracked piston(s).

Last edited by Firestorm500; 09-19-2011 at 02:52 PM.
Old 09-19-2011 | 02:54 PM
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X2....I would run a compression test
Old 09-19-2011 | 03:03 PM
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what about blowing oil up from the valve cover?
Old 09-19-2011 | 03:26 PM
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Originally Posted by Agent_Oragnge
what about blowing oil up from the valve cover?
Nothing around the gasket but little bit around the front ccv and oil fill cap
Old 09-19-2011 | 03:27 PM
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Originally Posted by xjforfishing
X2....I would run a compression test
Wet or dry com. Test?
Old 09-19-2011 | 03:35 PM
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Originally Posted by Firestorm500
The vacuum thingy is your water control valve for the heater.

If you are blowing oil out the dipstick, your crankcase is being pressurized. Could be blowby past the rings.

Or a cracked piston(s).
Ok the water control valve had oil all over it but hope its not the pistons and the engine runs great only smoke I get is from oil burning on the exhust pipe.
Old 09-19-2011 | 05:24 PM
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Originally Posted by milehigh94xj
Ok the water control valve had oil all over it but hope its not the pistons and the engine runs great only smoke I get is from oil burning on the exhust pipe.
That's a dangerous situation. It's coming from somewhere. You need to take it in and have it diagnosed by a proper mechanic before your Jeep catches on fire.
Old 09-19-2011 | 05:32 PM
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is the front hose on valve cover still hooked up to breather box?
Old 09-19-2011 | 05:36 PM
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Originally Posted by freegdr
is the front hose on valve cover still hooked up to breather box?
Yea got new hose and rear ccv yesterday
Old 09-19-2011 | 05:38 PM
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is there vacuum at the new ccv valve when running
Old 09-19-2011 | 05:39 PM
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Originally Posted by Firestorm500

That's a dangerous situation. It's coming from somewhere. You need to take it in and have it diagnosed by a proper mechanic before your Jeep catches on fire.
Yea I have mec. Down the street from me who has a comanche but he will call me when he has time to look at it
Old 09-19-2011 | 05:41 PM
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the back hose relieves crank case pressure at idle the front does it when cruising when does oil blow out
Old 09-19-2011 | 05:44 PM
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dry compression test
Old 09-19-2011 | 05:45 PM
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Originally Posted by freegdr
is there vacuum at the new ccv valve when running
Rear is blowing and front is sucking air in from the air box


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