Symptoms
Oil dripping from the joint between the engine and bellhousing.
The fix, step by step
- Following Jeep's 1973 service-manual procedure (via IFSJA): drain the oil and drop the pan, then remove the rear main cap and lower seal half.
- Loosen the other caps and tap out the upper half with a brass drift.
- Oil the crank and fit the new upper half lip-forward.
- Put sealant only on the lower half's end tabs, seat it in the cap, seal the cap's chamfers and torque to spec.
- Refit the pan with new gaskets.
- Always replace both halves together.
Tools & part numbers
- Brass drift
- torque wrench
- Permatex No. 2 or equivalent
Where to buy the parts
Crankshaft seal, 1984 Scrambler 4.2LRockAuto ↗Amazon ↗
Oil pan gasket, 1984 Scrambler 4.2LRockAuto ↗Amazon ↗
CJ rear main sealsQuadratec ↗Amazon ↗
Hunting a used or discontinued part? Search eBay Motors for Jeep CJ-8 Scrambler parts →
Rated for a competent home mechanic with a decent tool kit. Confirm torque figures, fluids and procedures against the factory service manual for your VIN, support the truck on stands rather than a jack, and work at your own risk (disclaimer). Some parts links are affiliate links, which pay us a small commission at no cost to you.