Isuzu 4LE2 Owner's Manual page 76

5-30
INSPECTION AND MAINTENANCE
No. 1 cylinder top dead center of the compression stroke
1
Exhaust Intake
No. 4 cylinder top dead center of the compression stroke
1
Exhaust Intake
6. Loosen the adjusting screw of the rocker arm little by little and adjust so that the
insertion and extraction of the thickness gauge is the appropriate firmness.
7. Tighten the adjusting screw lock nut of the rocker arm.
Rocker arm
CAUTION
• Be careful not to over-tighten the adjusting screws because the rocker arms
are made from aluminum die casting.
• Make sure that the valve springs are not pushed down when inspecting the
valve clearance because low load valve springs are used.
8. Align the timing mark of the crank pulley with the TDC mark again by rotating
the crankshaft 360° in the forward direction, and then adjust the clearance of the
remaining valves.
IDE-6450A_4500781_ALL.indd 5-30 IDE-6450A_4500781_ALL.indd 5-30
2
Exhaust Intake Exhaust
2
Exhaust Intake Exhaust
4. Loosen the adjusting screw of the rocker
arm.
5. Insert a thickness gauge between the rocker
arm and the valve stem, and then tighten
the rocker arm adjusting screw until the
thickness gauge sticks slightly.
Exhaust
Intake
Adjusting screw lock nut tightening torque
9.8 N·m (1.0 kgf·m/7 lb·ft)
3
Intake Exhaust
3
Intake Exhaust
Valve clearance (when cold)
0.40 mm (0.016 in)
0.40 mm (0.016 in)
4
Intake
4
Intake
2014/04/18 14:20:06 2014/04/18 14:20:06