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MECHANICAL
5. VALVE SPRING
1) Check the valve springs for damage, free length,
and tension. Replace the valve spring if it is not
within the standard presented in the table.
Intake
Free
mm (in)
length
Exhaust
Intake
Squareness
Exhaust
2) To measure the squareness of the valve spring,
stand the spring on a surface plate and measure its
deflection at the top of spring using a try square.
6. INTAKE AND EXHAUST VALVE OIL
SEAL
In the following case, pinch and remove the oil seal
from valve using pliers, and then replace it with a
new one.
• When the lip is damaged.
• When the spring is out of the specified position.
• When readjusting the surfaces of intake valve
and valve sheet.
• When replacing the intake valve guide.
1) Set the cylinder head on ST1.
2) Press-fit the oil seal to the specified dimension
indicated in the figure using ST2.
ST1 18250AA010 CYLINDER HEAD TABLE
ST2 499585500
VALVE OIL SEAL GUIDE
NOTE:
• Apply engine oil to oil seal before force-fitting.
Cylinder Head
39.55
Inner
(1.5571)
41.18
Outer
(1.6213)
46.32
(1.8236)
2.5°, 1.7 mm
Inner
(0.067 in)
2.5°, 1.8 mm
Outer
(0.071 in)
2.5°, 2.0 mm
(0.079 in)
ME-00132
ME(H6DO)-64
• When press-fitting the oil seal, do not use a ham-
mer or strike in.
ST2
ST1
7. VALVE LIFTER
1) Check the valve lifter visually.
2) Measure the outer diameter of valve lifter.
Outer diameter:
32.959 — 32.975 mm (1.2976 — 1.2982 in)
3) Measure the inner diameter of valve lifter hole of
cylinder head.
Inner diameter:
32.994 — 33.016 mm (1.2990 — 1.2998 in)
NOTE:
If difference between outer diameter of valve lifter
and inner diameter of valve lifter hole is out of the
standard or offset wearing is emitted, replace the
cylinder head.
Standard:
0.019 — 0.057 mm (0.0007 — 0.0022 in)
ME-02602
ME-00134
ME-00550
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