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Unread 09-22-2013, 06:08 AM   #1
cruiser54
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4.0 oil on top of valve cover

We all get tired of the oil film/leak on top of our 4.0 Jeep aluminum valve covers. Many times the biggest culprit is the loose fitting oil filler cap. Hereís a real easy fix:

Remove the plastic oil filler cap and wrestle the original rubber gasket from it using a small pick or screwdriver.

Make a duplicate of the gasket out of an old bicycle inner tube using scissors and a knife or razor blade.

Install the duplicate on the cap first, and then the original over top of it.

It will be a tight fit on the valve cover the first time, and may require some persuasion with a pair of pliers, but will get easier with time.

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Unread 09-22-2013, 09:11 AM   #2
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Quote:
Originally Posted by cruiser54 View Post
It will be a tight fit .............the first time, and may require some persuasion with a pair of pliers, but will get easier with time.
That's what she said.

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Unread 09-22-2013, 10:52 AM   #3
1990JEEPXJ
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I have ALWAYS wondered how to stop that. I tried two of the stock rubber pieces but it was way too thick. Thanks for this piece of info
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Unread 09-22-2013, 04:08 PM   #4
Paradise XJ
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Didn't think of just making the washer/gasket a bit thicker with the use of more material...I just went to the hardware store and bout a thicker rubber washer that fit over the cap and laid flat within the grooves.
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Unread 09-22-2013, 08:13 PM   #5
cruiser54
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Quote:
Originally Posted by CCKen View Post
That's what she said.

Yeah, but no mention of the pliers..............
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Quote:
Originally Posted by chris87xj View Post
If you own a Renix Jeep, you'll want to check this out. >

An index to over 25 write-ups can be found in Post #1.

Cruiser's Mostly Renix Tips
Refresh*Connections*Before*Replacing*Components
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Unread 09-23-2013, 06:55 AM   #6
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Quote:
Originally Posted by cruiser54 View Post
Yeah, but no mention of the pliers..............
Would tweezers be more applicable to you....
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Unread 09-23-2013, 07:09 AM   #7
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Quote:
Originally Posted by CCKen View Post
Would tweezers be more applicable to you....
LOL. ChannelLocks.
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Quote:
Originally Posted by chris87xj View Post
If you own a Renix Jeep, you'll want to check this out. >

An index to over 25 write-ups can be found in Post #1.

Cruiser's Mostly Renix Tips
Refresh*Connections*Before*Replacing*Components
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Unread 09-23-2013, 08:44 AM   #8
STi954
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Do you happen to have a pic of this? Sorry I come across this at work just now, knowing I have the same problem I thought I could make something here but I cannot picture what the gasket looks like. If not no worries I'll just look tonight and do it tomorrow.
Thanks
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