Periodic Maintenance Procedures
Using a thickness gauge [A], measure the clearance be-
tween each cam lobe and valve lifter for all 4 valves.
For the purpose of adjusting the valve clearances, record
the measured values.
0.17 ∼ 0.22 mm (0.0067 ∼ 0.0087 in.)
0.10 ∼ 0.15 mm (0.0039 ∼ 0.0059 in.)
If the valve clearance is not within the specified range,
Valve Clearance Adjustment
Camshaft Caps [A] (see Camshaft Removal in the En-
gine Top End chapter)
Camshafts [B] (see Camshaft Removal in the Engine
Top End chapter)
Remove the valve lifters [C] of the applicable valve.
Remove the shims [D].
Mark and record the locations of the valve lifters and
shims so that they can be reinstalled in their original
Clean the shim to remove any dust or oil.
Measure the thickness of the removed shim [A].
Select a new shim thickness calculation as follows.
a + b – c = d
[a] Present Shim Thickness
[b] Measured Valve Clearance
[c] Specified Valve Clearance (Mean Value)
Exhaust 0.195 mm
Intake 0.125 mm
[d] Replace Shim Thickness
2.60 + 0.31 – 0.125 = 2.785 mm
Exchange the shims for the 2.800 size shim.
Do not use the shims for another models. This
could cause wear of the valve stem end and the
valve stem damage.
PERIODIC MAINTENANCE 2-23