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.
4 thoughts on “Oil Filler Cap Mod”
My oil cap gasket is not pliable AT ALL! I don’t see any way to get it past the locking tabs on the cap without damaging it. Suggestion appreciated.
Leave it there and ADD the flexible inner tube above it.
I used some sheet viton to cut my own gasket, 1/8 inch thick. works fine and Viton is highly oil and heat resistant.
That’s sophisticated! LOL. I have granddaughters with bikes and stuff, so I always have old inner tubes on hand.