2-16 PERIODIC MAINTENANCE
Periodic Maintenance Procedures
Engine Top End
Valve Clearance Inspection
Valve clearance must be checked and adjusted when
the engine is cold (at room temperature).
Valve Adjusting Covers [A] (see Camshaft Sprocket Re-
moval in the Engine Top End chapter)
Camshaft Sprocket Cover [B] (see Rocker Arm Removal
in the Engine Top End chapter)
Remove the alternator rotor nut cap.
Special Tool - Filler Cap Driver: 57001-1454
Turn the crankshaft counterclockwise until the line mark
[A] on the KACR unit aligns with the sprocket cover mating
surface projection [B].
Using a thickness gauge [A], measure the valve clearance
between the adjusting screw [B] and valve stem. Measure
the clearance for both valves at a time.
Valve Clearance (when cold)
Valve Clearance Adjustment
If a valve clearance is incorrect, adjust it.
Use the valve adjusting screw holder [A] to holding the
valve adjusting screw [B], loosen the adjusting screw lock-
nut [C] and insert the thickness gauge [D] between the
valve and adjusting screw, and turn the screw until the
adjusting screw stops.
Special Tool - Valve Adjusting Screw Holder: 57001-1217
Torque - Valve Adjusting Screw Locknut: 8.8 N·m (0.90
kgf·m, 78 in·lb)
Install the removed parts (see appropriate chapters).
0.04 ∼ 0.08 mm (0.002 ∼ 0.003 in.)
0.08 ∼ 0.12 mm (0.003 ∼ 0.005 in.)