Engine Oil filler hole
Tried that. The hole has been modified to accept the screw in cap. Stock cap will not work.Below is the one you need. There's two different style oil fill plugs for two different valve covers. One that is a turn locking style (below) and the other that is just a rubber stopper.
Amazon.com: Omix-Ada | 17403.02 | Engine Oil Cap | OE Reference: 33001016 | Fits 1980-1990 Jeep CJ / YJ / XJ / SJ 2.0L / 2.1L / 2.5L / 2.8L / 4.0L / 4.2L : Automotive
Buy Omix-Ada | 17403.02 | Engine Oil Cap | OE Reference: 33001016 | Fits 1980-1990 Jeep CJ / YJ / XJ / SJ 2.0L / 2.1L / 2.5L / 2.8L / 4.0L / 4.2L: Oil Filler Caps - Amazon.com ✓ FREE DELIVERY possible on eligible purchaseswww.amazon.com
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