Crankcase Breather Filter Replacement -
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post #1 of 9 Old 02-24-2010, 12:42 PM Thread Starter
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2005 KJ Liberty 
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Crankcase Breather Filter Replacement

This seems so stupid but I've gotta ask. Is there a specific type of crankcase breather filter/element for a 2005 3.7 engine?
It's the small foam piece about 2inch by 1 inch in the air box.
I've got 50k miles and thought I'd just replace it but I can't find a part number. Can anyone point me towards a suitable replacement?


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post #2 of 9 Old 02-25-2010, 09:02 AM
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Plus 1.....I need the exact same thing!

2005 Liberty, Lifted with "stuff"
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post #3 of 9 Old 01-09-2012, 07:33 PM
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Does anyone know the answer to this? I thought about just cutting a regular sponge to the right size.

2011 Liberty Limited 70th Anniversary Edition
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post #4 of 9 Old 01-09-2012, 09:06 PM
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Ha Ha.. known as Mr. Sponge Bob...
I am sure the dealer probably has a replacement however, you could cut a rectangular piece of PCV filter or even use Mr Sponge Bob cut to size.
If the original is in good condition but a bit dirty, use some ivory soap/fantastic mixture ... and warm water clean it & replace .
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post #5 of 9 Old 01-13-2012, 10:21 PM
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Cleaning it works so many times, before it eventually disintegrates. I use an oil catch can, which is a huge ford fuel filter in line with that hose. I don't have to worry about that anymore... My PCV system is wide open, so I use the catch, and I have virtually no positive crank case pressure.
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post #6 of 9 Old 01-14-2012, 12:03 PM Thread Starter
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I just ended up going to the auto store and buying a new crankcase filter for a different vehicle that seemed to be the closest in type of foam density and cut it to fit. When I asked the tech at the dealer about buying a replacement he said my engine didn't have one.

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post #7 of 9 Old 07-14-2013, 10:29 AM
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Join Date: Jul 2013
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Same Problem

I have a 2004 Jeep Liberty 3.7L. I also need to change this filter since it fell apart. Anyone find out if there is a part number for this?
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post #8 of 9 Old 01-20-2014, 07:27 PM
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2005 KJ Liberty 
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Location: Cleveland, OH
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I know this is a big time bump, but has anyone ever found a legit replacement part for this? I can rig something else, but my first preference is to find a replacement part
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post #9 of 9 Old 01-21-2014, 11:47 AM
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I've seen someone on the forum here say they found one at like Autozone or something like that.

My local parts house didn't have one so I bought the one that fits into the 1975 chev 350 aircleaner and pulled the white mesh out of the plastic holder it comes with, folded it in half and it fits just right into the Liberty filter slot.
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