Mitsubishi L2C Service Manual

INSPECTION AND REPAIR OF BASIC ENGINE
6-2
1. Inspecting and repairing cylinder head and valve mechanism
1.1 Measuring clearance between rocker arm
and rocker shaft
Measure the inside diameter of the rocker arm and outside
diameter of the rocker shaft.
Replace the rocker arm or rocker shaft if the clearance
exceeds the limit.
Measuring rocker arm inside diameter and rocker shaft
outside diameter
1.2 Measuring valve stem outside diameter and
valve guide inside diameter
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 Nominal Standard Limit
Rocker arm
inside diameter
ø 12 mm
[0.47 in.]
12.013 to 12.035 mm
[0.4730 to 0.4738 in.]
-
Rocker shaft
outside diameter
ø 12 mm
[0.47 in.]
11.470 to 11.984 mm
[0.4516 to 0.4718 in.]
-
Clearance
between rocker
arm and shaft
-
0.029 to 0.065 mm
[0.0011 to 0.0026 in.]
0.200 mm
[0.0079 in.]
Measuring
directions
Measuring
directions
Measuring
points
Item Nominal Standard Limit
Va lv e
stem
outside
diameter
Inlet
ø 6.6 mm
[0.260 in.]
6.565 to 6.580 mm
[0.2585 to 0.2591 in.]
6.500 mm
[0.2559 in.]
Exhaust
ø 6.6 mm
[0.260 in.]
6.530 to 6.550 mm
[0.2571 to 0.2579 in.]
6.500 mm
[0.2559 in.]
Clear-
ance
between
valve
stem
and
valve
guide
Inlet -
0.020 to 0.050 mm
[0.0008 to 0.0020 in.]
0.100 mm
[0.0039 in.]
Exhaust -
0.050 to 0.085 mm
[0.0020 to 0.0034 in.]
0.150 mm
[0.0059 in.]
Va lv e
guide
inside
diameter
Inlet
ø 6.6 mm
[0.260 in.]
6.600 to 6.615 mm
[0.2598 to 0.2604 in.]
-
Exhaust
ø 6.6 mm
[0.260 in.]
Measuring
directions
Measuring
points
Measuring
directions
Measuring
points
Inside
micrometer

Mitsubishi L2C Specifications

General

Brand	Mitsubishi
Model	L2C
Category	Engine
Language	English