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Old 07-20-2010, 08:05 PM   #1
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seepage around crankcase breather

This jeep continues to cause me problems. Today I noticed what seems to be some oil seepage around the breather valve closest to the front of the engine. I had jerked it around a bit and it seems a bit will seep out. How do I fix this and what is the cause?

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Old 07-20-2010, 08:52 PM   #2
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if it's just a little oil.. then nothing is wrong... PCV valves or our crankcase valves normally will have a little bit of oil (which can look like a lot if you don't wipe it off for a long time) due to the constant moving of oil throughout the engine. So if you can't see the oil spewing out.. or squrting out... but just see an accumulation ... no worries.

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Old 07-20-2010, 09:52 PM   #3
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Yes it is just a little. It doesn't seem like enough is coming out to drip anywhere, just a small amount has perhaps seeped out. Do these valves need to be replaced if they become too warn at the bottom or is the oil loss negligible?
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Old 07-20-2010, 10:57 PM   #4
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yes PCV valves can go bad.... it will increase the pressure inside the crankcase... I'm not sure how our PCV valves are setup... but usually, if you take it out and shake it (as it's just a ball valve) if it rattles, you're good... if not.. replace it.
But I'd wait for somebody who has worked on a 4.0 PCV valve before.
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Old 07-20-2010, 11:01 PM   #5
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Quote:
Originally Posted by FlaJeep View Post
But I'd wait for somebody who has worked on a 4.0 PCV valve before.
Great advice....and here is the news. The TJ 4.0 does NOT have a pcv valve. So no worries there.

Small seepage from the grommet is normal and is simply due to it not sealing/seating correctly. They get old and dry out and some simply shrink a hair. Best bet....replace the grommet

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Old 07-20-2010, 11:12 PM   #6
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I'm assuming that hose handles crank case ventilation thought? .... how? just throwing it back into the intake and letting it burn up? :|
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Old 07-20-2010, 11:46 PM   #7
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Quote:
Originally Posted by distortedtj View Post
Great advice....and here is the news. The TJ 4.0 does NOT have a pcv valve. So no worries there.

Small seepage from the grommet is normal and is simply due to it not sealing/seating correctly. They get old and dry out and some simply shrink a hair. Best bet....replace the grommet

Do you have to seal the grommet down with anything or does the elbow piece hold it down?

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