Cylinder head and valve mechanisms
51
l If the valve clearance exceeded the standard value, replace the tappet
(See——Adjustment of Valve Clearance).
(3) Turn clockwise the crankshaft for 360
o
, enabling the piston to locate on the TDC of cylinder
no.4, i.e.: allow the valve check signs on the intake and exhaust VVTs to locate as shown
in Fig. below.
(4) Measure with a feeler the valve clearances of all cylinders as marked in Fig. B.
l If the valve clearance exceeded the standard value, replace the tappet
(See——Adjustment of Valve Clearance).
Standard value of valve clearance (the engine under cooling state)
Intake: 0.18～0.26mm{0.0071～0.0102in}(0.22±0.04mm{0.0087±0.0016in})
Exhaust0.26～0.34mm{0.0102～0.0134in}(0.30±0.04mm{0.0118±0.0016in})
4. Fit the cylinder head cover (See——Installation of Timing Sprocket and Cylinder Head
Cover).
Adjustment of valve clearance
All valves which require the adjustment of clearance shall be operated as per the following
procedure:
1. Turn clockwise the camshaft with the key slot of crankshaft facing upward.
2. Disassemble the camshaft (See this section, Disassembly of Camshaft).
3. Take out the tappet whose valve clearance needs to be adjusted.
4. Select a suitable tappet.
Thickness of new tappet = thickness of old tappet + measured valve clearance－standard
valve clearance
Intake side Exhaust side
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