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Oil on aluminum valve coer 4.0

cruiser54

NAXJA Forum User
Location
Prescott, Az
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. Here’s 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.
 
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. Here’s 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.

Good idea!

It is also helpful to replace the CCV grommets every 100k miles or so.
 
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. Here’s 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.


I did this about three years ago and haven't been able to keep air in my bike tire ever since.:gee:
 
I did this about three years ago and haven't been able to keep air in my bike tire ever since.:gee:
LOL! I had to read your post MORE THAN ONCE to get your point.

That is what I get for going to Modesto!
 
What were you doing in Kommiefornia?

Hauled 175 salted beef hides down for processing into export goods to the PRC.

In-laws run a custom farm slaughter business.
 
They allow those in PRK?

I'm still surprised they haven't been shut down.

Hard to imagine any manufacturing/processing functions being able to operate in that regulatory hell.
 
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