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INSPECTION AND MEASUREMENTS
• Cam shaft
• Outer diameter of rocker arm shaft
Standard
Out of the limit
Standard value
Out of the limit to use
value
to use
12.99mm
If 12.94 mm (0.509 in) or
Outer dia. in
17.98mm
If 17.95 mm (0.707
bearing
0.708 in
in) or less, it needs
(Upper)
replacement.
0.511 in
less, it needs replacement.
Outer dia. in
15.97mm
If 15.95 mm (0.628
bearing
0.629 in
in) or less, it needs
(Lower)
replacement.
Cam height
23.90mm
If 23.75 mm (0.935
in) or less, it needs
IN&EX
0.94 in
replacement.
Measurement with cylinder gauge
• Inner diameter of cylinder
Standard value
Out of the limit to use
59.00mm
If 59.06 mm (2.3252 in) or
2.3228 in
more, it needs replacement.
.A
• Valve stem
Standard
Out ofthe limit
value
to use
5.48mm
If 5.46 mm (0.215
IN
0.216 in
in) or less, it needs
replacement.
5.46 mm
If 5.44 mm (0.214
EX
0.215 in
in) or lE!ss, it needs
replacement.
• Diameter of piston pin hole
Standard value
Out of the limit to use
16.002mm
Depends on clearance
0.630 in
between pin and hole.
• Clearance between valve guide and valve stem
Standard value
Out of the limit
to
use
0.008 - 0.04 mm
If 0.07 mm (0.0028
IN
in) or more, it needs
0.003 - 0.0016 in
replacement.
0.025 - 0.057 mm
If 0.10 mm (0.004
EX
in) or more, it needs
0.0010 - 0.0022 in replacement.
• Clearance between piston pin and piston pin
hole
Standard value
Out of the limit to use
0.002 - 0.012 mm
If 0.04 mm (0.0016 in) or
0.00008 - 0:0005 in more, it needs replacement.
Engines
& Generators
21
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