Symptoms
A louder-than-usual top-end clatter, or an oily rocker cover. One forum member says the TD42's tappets want adjusting about every 20,000 km, and that poor early servicing leads to serious valve-train wear.
The fix, step by step
- With the engine cold, remove the rocker cover.
- Turn the crank to TDC on cylinder 1 and adjust valves 1, 2, 4, 5, 8 and 9.
- Rotate to TDC on cylinder 6 and adjust 3, 6, 7, 10, 11 and 12.
- One forum member sets 0.35 mm at ambient temperature; confirm the intake and exhaust figures in the workshop manual.
- Fit a new rocker-cover gasket and breather seals, then refit the cover evenly.
Tools & part numbers
- Feeler gauges
- ring spanner and screwdriver for the adjusters
- large socket to turn the crank
- new gasket kit.
Where to buy the parts
Rocker cover gasket kit, TD42 (GQ/GU)Patrolapart ↗Amazon ↗
Genuine Nissan rocker cover gasket, GQ/GU TD42Patrolapart ↗Amazon ↗
Hunting a used or discontinued part? Search eBay Motors for Nissan Patrol Y60 (GQ) 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.