11-12
2. Inspection and Adjustment of Valve Clearances
Service standards (Unit: mm)
Tightening torque (Unit: N·m {kgf·m})
Special tools
• Valve clearances should be checked and adjusted as follows
while the engine is still cold.
[Inspection]
• Remove the rocker cover.
• Bring the No. 1 or No. 6 cylinder piston to the top dead center
(TDC) on the compression stroke according to the following pro-
cedure:
• Rotate the crankshaft until the pointer is aligned with the “1 6”
mark on the flywheel.
• This will place either the No. 1 or No. 6 cylinder piston at TDC
on the compression stroke. The cylinder in which the rocker
arms for both the intake and exhaust valves can be pushed
down by hand by the valve clearance amounts has its piston
at TDC. Rotate the engine by one full turn to switch the TDCs
of the No. 1 and No. 6 cylinder pistons.
• With the No. 1 or No. 6 cylinder piston at TDC, measure the
clearance of the valves (clearance between valve bridge and
pad) marked with a circle in the table below.
Location Maintenance item Standard value Limit Remedy
– Valve clearance (when cold) 0.6 – Adjust
Mark Parts to be tightened Tightening torque Remarks
– Lock nut (adjusting screw tightening) 59 {6.0} –
– Lock nut (rocker arm adjusting screw tightening) 34 {3.5} –
Mark Tool name and shape Part No. Application
Socket wrench MH063003 Tightening the lock nut
Cylinder No. 123456
Valve IN EX IN EX IN EX IN EX IN EX IN EX
No. 1 cylinder
piston at TDC on
compression stroke
OOO– –OO – – O – –
No. 6 cylinder
piston at TDC on
compression stroke
–––OO––OO–OO
GENERAL INSPECTION AND ADJUSTMENT
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