Symptoms
Oil residue around the oil filter area and bottom of the engine, traced to the driver-side timing cover.
The fix, step by step
- Dealers drop the engine to reseal or replace the cover.
- One IH8MUD owner documented doing the valve covers, cam towers, coolant valley and timing cover together at home on a 177k-mile truck, working from the factory service manual and labeling every fastener.
- It's a big job.
- Some owners just monitor slow seeps and check levels at each oil change.
Tools & part numbers
- Factory service manual
- full metric socket set
- FIPG
- timing cover seal
- head gasket set if doing cam towers
- painter's tape and cups for fastener labeling
Where to buy the parts
Timing cover (front crank) seal, 2015 GX 460RockAuto ↗Amazon ↗
Valve cover gaskets, 2015 GX 460RockAuto ↗Amazon ↗
Engine oil (SAE 0W-20), 2015 GX 460RockAuto ↗Amazon ↗
Hunting a used or discontinued part? Search eBay Motors for Lexus GX 460 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.