2-2
MAINTENANCE STANDARDS
Nominal
Assembly Standard
Repair
Service
Inspection Point
Limit
Limit
Remark
Value
[Standard Clearance]
[Clearance] [Clearance]
Warpage of gasket contact
0.05 (0.0020)
0.20
Regrind if warpage is minor.
Cylinder
surface
or less
(0.0079)
head
Compressed thickness of
1.2 (0.05)
±0.05 (±0.002)
gasket
Inlet valve
7.940 to 7.955
7.900
Diameter of valve
8 (0.31)
(0.3126 to 0.3132)
(0.3110)
stem
Exhaust
7.920 to 7.940
7.850
valve
(0.3118 to 0.3126)
(0.3091)
Valve and
Inlet valve
[0.065 to 0.095
[0.150
valve guide
Clearance between
(0.0026 to 0.0037)]
(0.0059)]
guide and stem
Exhaust
[0.080 to 0.115
[0.200
valve
(0.0032 to 0.0045)]
(0.0079)]
Height to top of valve guide
14 (0.55)
±0.1 (±0.004)
Angle
30˚
Inlet valve
0.4
Valve sinkage
(0.016)
±0.1 (±0.004)
1.0
Exhaust
0.5
(0.039)
Valve seat
valve
(0.020)
Width
1.4
±0.14 (±0.0055)
1.8
(0.055)
(0.071)
Up to 1.83
Valve margin
2.13 (0.0839)
(0.0720) by
refacing
Free length
48.85
47.60
(1.92)
(1.87)
Valve spring
Perpendicularity
1.5° or less
Set length
43 (1.69)
Set force
N (kgf) [lbf]
176 to 196 (18 to 20)
147 (15)
[40 to 44]
[33]
Inside diameter of rocker
19.010 to 19.030
bushing
19 (0.75)
(0.7484 to 0.7492)
Rocker arm Diameter of rocker shaft
18.980 to 19.000
(0.7472 to 0.7480)
Clearance between bushing
[0.010 to 0.050
[0.070
and shaft
(0.0004 to 0.0020)]
(0.0028)]
Valve
Deflection
0.3 (0.012)
1/2 of dial indicator reading
pushrod
or less
Deflection
0.02 (0.0008)
0.05
or less
(0.0020)
Journal diameter
78 (3.07)
77.955 to 77.970
77.850
77.100
(3.0691 to 3.0697)
(3.0650)
(3.0354)
Crankpin diameter
58 (2.28)
57.955 to 57.970
57.800
(2.2817 to 2.2823)
(2.2756)
Crankshaft
Center to center distance
60 (2.36)
±0.04 (±0.0016)
between journal and crankpin
Parallelism between journal
Runout:
0.01 (0.004) or less
and crankpin
(over crankpin length)
Circularity of journal and
crankpin
0.01 (0.0004)
0.03
Taper of journal and crankpin
or less
(0.0012)
Cylinder head
Main moving parts
Group
Unit: mm (in.)
Seat width
Valve
margin
Valve sinkage
Valve seat
angle