Honda GP160H, Руководство пользователя

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12-7
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CYLINDER HEAD
VALVE FACE/VALVE STEM O.D.
Inspect each valve face [1] for irregularities.
If necessary, replace the valve.
Inspect each valve [2] for bending or abnormal stem
wear.
If necessary, replace the valve.
Measure and record each valve stem O.D.
If the measurement is less than the service limit,
replace the valve.
GUIDE-TO-STEM CLEARANCE
Subtract each valve stem O.D. from the corresponding
guide I.D. to obtain the guide-to-stem clearance.
If the calculated clearance is more than the service limit,
replace the valve and cylinder head as a set
(page 12-4).
VALVE SPRING FREE LENGTH/
PERPENDICULARITY
Measure the valve spring free length.
If the measured length is less than the service limit,
replace the valve spring.
Measure the valve spring perpendicularity.
If the measured perpendicularity is more than the
service limit, replace the valve spring.
STANDARD:
IN: 5.468 – 5.480 mm (0.2153 – 0.2157 in)
EX: 5.425 – 5.440 mm (0.2136 – 0.2142 in)
SERVICE LIMIT:
IN: 5.318 mm (0.2094 in)
EX: 5.275 mm (0.2077 in)
[2]
[1]
STANDARD:
IN: 0.020 – 0.044 mm (0.0008 – 0.0017 in)
EX: 0.060 – 0.087 mm (0.0024 – 0.0034 in)
SERVICE LIMIT:
IN: 0.10 mm (0.004 in)
EX: 0.12 mm (0.005 in)
STANDARD: 30.5 mm (1.20 in)
SERVICE LIMIT: 29.0 mm (1.14 in)
SERVICE LIMIT: 1.5° max.