OPERATIONAL PERFORMANCE TEST / Engine Test Adjustment: If the measurement results are out of specification, adjust the valve clearance in the same order of measurement. 1. Loosen the lock nuts (16 used) and adjusting screws (16 used), which secure the rocker arm by using adjust nut wrench (Isuzu 5-8840-2822-0). 2. Insert a thickness gauge into the clearance be- tween rocker arm roller and cam shaft. 3. Tighten the adjusting screw of rocker arm until condition for the thickness gauge is proper. 4. Tighten the lock nut of rocker arm. Cam Shaft Thickness Gauge : 18 N m (1.8 kgf m, 13.2 lbf ft) 5. Check the valve clearance after the lock nuts are tightened.
T1T1-04-03-004 Adjust Nut Wrench Rocker Arm Valve Clearance Valve Clearance Cam Shaft T1T1-04-03-005 Rocker Arm Roller T4-3-6