Mitsubishi S3Q2, Руководство по обслуживанию

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INSPECTION AND REPAIR OF BASIC ENGINE
6-3
1.4 Measuring push rod runout
Measure the runout of push rod. If the standard value is
exceeded, replace the push rod.
Measuring push rod runout
1.5 Measuring valve stem outside diameter and
valve guide inside diameter
Remove the carbon deposits from valve and valve guide.
Measure the diameter at the top and bottom ends at right
angles to the outer and inner surfaces, since valve stems and
valve guides are more likely to wear at both ends.
If the outside diameter is less than the limit, or the clearance
exceeds the limit, replace either the valve or the valve guide
with a new one.
Measuring valve stem outside diameter
Measuring valve guide inside diameter
Item Standard Remark
Push rod
runout 0.3 mm
[0.012 in.] or less
Total indicated reading
(TIR)
1/2L 1/2L
L
Pushrod
Item Nominal Standard Limit
Valve
stem
outside
diameter
Inlet
ø 8 mm
[0.31 in.]
7.940 to 7.955 mm
[0.3126 to 0.3132 in.]
7.900mm
[0.3110 in.]
Exhaust
ø 8 mm
[0.31 in.]
7.920 to 7.940 mm
[0.3118 to 0.3126 in.]
7.850 mm
[0.3091 in.]
Clearance
between
valve stem
and valve
guide
Inlet -
0.045 to 0.075 mm
[0.0018 to 0.0030 in.]
0.130 mm
[0.0051 in.]
Exhaust -
0.060 to 0.095 mm
[0.0024 to 0.0037 in.]
0.150 mm
[0.0059 in.]
Valve guide mount-
ing dimension 15.5 mm
[0.610 in.]
15.1 to 15.6 mm
[0.594 to 0.614 in.]
-
Measuring
directions
Measuring
points
Measuring
locations
Inside micrometer