Mitsubishi S12A2 User Manual

6-12
Chapter 6 INSPECTION AND REPAIR OF BASIC ENGINE
2.4 Camshaft Runout - Measure
Measure the runout of camshaft at TIR.If the value exceeds
the limit, correct the camshaft using a press, or replace the
camshaft with a new one.
Note: With a dial gauge set on the camshaft, rotate the cam-
shaft one turn and read the gauge indication.
Camshaft Runout - Measure
2.5 Camshaft Journal Outside Diameter - Measure
Measure the diameter of each camshaft journal in two direc-
tions at right angles to each other.If the value exceeds the
limit, replace the camshaft with a new one.
Camshaft Journal Outside Diameter - Measure
2.6 Camshaft Bushing - Inspect
(1) Check the inside surface of each bushing for damage,
corrosion, flaking and other abnormalities. If any defect
is found, replace the camshaft bushing with a new one.
(2) Measure the camshaft bushing inside diameter with
bushing installed in the crankcase.If the value exceeds
the limit, replace the camshaft bushing with a new one.
Note: Be careful not to damage the inner surface of camshaft
bushing when measuring the inside diameter.
Camshaft Bushing Inside Diameter - Measure
Item Standard value Limit value Remarks
Camshaft runout
0.05 mm
[0.0020 in.] or less
0.08 mm
[0.0031 in.]
TIR
1/21/2
Surface plate
V-block
Item
Nominal
value
Standard
value
Limit value
Camshaft
Journal
diameter
No. 1 journal
ø64 mm
[2.52 in.]
63.920 to
63.940 mm
[2.5165 to
2.5173 in.]
63.870 mm
[2.5146 in.]
No. 2 to No. 7
journal
ø68 mm
[2.68 in.]
67.920 to
67.940 mm
[2.6740 to
2.6748 in.]
67.870 mm
[2.6720 in.]
Measurement
direction
Item
Nomi-
nal
value
Standard
value
Limit value
Camshaft
bushing inside
diameter
No. 1 journal
ø64 mm
[2.52 in.]
64.000 to
64.030 mm
[2.5197 to
2.5209 in.]
64.090 mm
[2.5232 in.]
No. 2 to No. 7
journal
ø68 mm
[2.68 in.]
68.000 to
68.030 mm
[2.6772 to
2.6783 in.]
68.090 mm
[2.6807 in.]
Measuring direction

Mitsubishi S12A2 Specifications

General

Brand	Mitsubishi
Model	S12A2
Category	Engine
Language	English