2-22 PERIODIC MAINTENANCE
Periodic Maintenance Procedures
Valve Clearance Measuring Position
#2 Piston TDC at End of Compression Stroke →
Inlet valve clearances of #2 piston, and
Exhaust valve clearances of #2 piston
If the valve clearance is not with in the specified range,
first record the clearance, and adjust it.
Valve Clearance Adjustment
To change the valve clearance, remove the camshaft
chain tensioner, camshafts and valve lifters. Replace the
shim with one of a different thickness.
Mark and record the valve lifter and shim locations so
they can be reinstalled in their original positions.
If there is no clearance, select a shim which is several
sizes smaller and then measure the clearance.
To select a new shim which brings the valve clearance
within the specified range, refer to the Valve Clearance
Apply a thin coat of molybdenum disulfide grease to the
Install the camshafts. Be sure to time the camshafts prop-
erly (see Camshaft Installation in the Engine Top End
Remeasure any valve clearance that was adjusted.
Readjust if necessary.
Do not put shim stock under the shim. This may
cause the shim to pop out at high rpm, causing ex-
tensive engine damage.
Do not grind the shim. This may cause it to fracture,
causing extensive engine damage.