SERVICE DATA
2-3
Valve seat
and valve
Valve seat angle 45°
Valve sinkage
0
[0.00]
0.25 to 0.75
[0.0098 to 0.0295]
1.50
[0.0591]
Valve head width
1.6
[0.063]
1.30 to 1.80
[0.0512 to 0.0709]
2.50
[0.0984]
Valve margin
1.5
[0.059]
1.35 to 1.65
[0.0531 to 0.0650]
0.50
[0.0197]
Valve guide mounting length
10
[0.39]
9.5 to 10.5
[0.374 to 0.413]
Valv e
spring
Free length 47 [1.85]
46
[1.81]
Squareness
θ = 2.0°
Δ = 0.2 [0.0079] or less
Lf = 47 [1.85]
Δ = 0.5
[0.020]
over
entire
length
Rest length / load
39.0 [1.535]/
131 to 145 N
{13.3 to 14.7 kgf}
{29 to 32 lbf}
30.1 [1.185]/
279 to 309 N
{28.5 to 31.5 kgf}
[63 to 69 lbf]
-15%
Pushrod Runout 0.3 [0.012] or less Replace
Cylinder
head
Distortion of cylinder head bottom surface 0.05 [0.0020] or less
0.10
[0.0039]
Repair
Cylinder
Distortion of block top surface 0.05 [0.0020] or less
0.10
[0.0039]
Repair
Inside diameter
ø 78
[3.073]
ø 78
+0.030
+0.060
[3.07 +0.0012
+0.0024
]
78.2
[3.079]
Repair to oversize or
replace
Cylindericity ±0.01 [0.0004] or less
Piston
Outside diameter
STD
78.00
[3.0709]
77.93 to 77.95
[3.0681 to 3.0689]
77.80
[3.0630]
0.25 OS
78.25
[3.0807]
78.18 to 78.20
[3.0779 to 3.0787]
78.05
[3.0728]
0.50 OS
78.50
[3.0905]
78.43 to 78.45
[3.0878 to 3.0886]
78.30
[3.0827]
Weight difference in one engine ±5 g [0.18 oz.] or less
Piston pin outside diameter
ø 23
[0.91]
22.994 to 23.000
[0.9053 to 0.9055]
Clearance between piston pin bore and pis-
ton pin
0.006 to 0.018
[0.0002 to 0.0007]
0.050
[0.0020]
Clearance between piston and cylinder
(clearance)
0.035 to 0.086
[0.0014 to 0.0034]
0.300
[0.0120]
Repair to oversize or
replace
Table 2-2 Maintenance service data table - Basic engine (2 / 3) Unit: mm [in.]
Inspection point Nominal Standard Limit Remark
Valve
margin
Valve
sinkage
Valve
seat angle
Seat width
ٌ
Lf
Ç°
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