Symptoms
Oil running down the back of the block, a flickering oil-pressure gauge, oil on the exhaust manifolds.
The fix, step by step
- OffroadXtreme names the rear main seal, valve cover gaskets and oil pressure sending unit as the V8's usual leaks.
- Check the sender first: it's cheap, and a leaking one also makes the gauge unreliable.
- Replace it, then reseal the valve covers with new gaskets, torquing the bolts evenly to the manual spec.
- A rear main leak on the V8 is a pan-off job like the six's.
Tools & part numbers
- Oil-pressure sender socket
- sockets and extensions
- torque wrench
- gasket scraper
Where to buy the parts
Oil pressure sending units for 1993–1998 Grand Cherokee ZJQuadratec ↗Amazon ↗
Crown 53006625 intake manifold gasket, 5.2/5.9 V8 ZJQuadratec ↗Amazon ↗
Valve cover gaskets and rear main seal (RockAuto catalog)RockAuto ↗
Hunting a used or discontinued part? Search eBay Motors for Jeep Grand Cherokee ZJ 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.