Mitsubishi S6R Series User Manual

2-4
Chapter 2 SERVICE DATA
1.2 Maintenance Service Data of Basic Engine
Unit: mm [in.]
Item
Nominal
value
Standard value Limit value Remarks
Rockers
Rocker bushing inside diameter ø36 [1.42]
36.000 to 36.040
[1.4173 to 1.4189]
36.090
[1.4209]
Rocker shaft outside diameter ø36 [1.42]
35.966 to 35.991
[1.4160 to 1.4170]
35.940
[1.4150]
Va lve
Valve stem outside diameter ø10 [0.39]
9.940 to 9.960
[0.3913 to 0.3921]
9.910
[0.3902]
Same for both inlet and
exhaust valves.
Valve guide inside diameter ø10 [0.39]
10.000 to 10.015
[0.3937 to 0.3943]
10.060
[0.3961]
Clearance
between the bot-
tom face of valve
bridge and top
face of valve
rotator
Intake side
2.1
[0.083]
Single valve spring spec
only
Exhaust
side
Single valve spring spec
3.4
[0.134]
Double valve spring
spec
2.1
[0.083]
Valve seat
and valve
Valve seat angle 30°
Valve sinkage 0
- 0.1 to 0.1
[-0.004 to 0.004]
1.0
[0.039]
Seat width
2.3
[0.091]
2.18 to 2.42
[0.0858 to 0.0953]
2.8
[0.110]
Valve margin
3.0
[0.118]
2.8 to 3.2
[0.110 to 0.126]
2.5
[0.098]
Inside diameter of valve seat counterbore
60.000 to 60.030
[2.3622 to 2.3634]
60.09
[2.3657]
Valve seat outside
diameter
Standard
60.100 to 60.130
[2.3661 to 2.3673]
2 lines, brown
0.03
60.130 to 60.160
[2.3673 to 2.3685]
3 lines, brown
0.06
60.160 to 60.190
[2.3685 to 2.3697]
4 lines, brown
Valve seat interference
0.070 to 0.130
[0.0028 to 0.0051]
Single
valve
spring
P/N:
37504-10400
Free length 73 [2.87] 71 [2.80]
Squareness
A=1.5° or less
B=1.9 [0.075] or less
Lf=73 [2.87]
B=2.2
[0.087] over
entire length
Installed length/load
(mm [in.]/N {kgf} [lbf])
66.0 [2.60]/289 to 319
{29.45 to 32.55}
[65 to 72]
Double
valve
spring
P/N:
37504-10600
Inner
spring
Free length
90.6
[3.567]
88.12
[3.469]
Squareness
A=2.0° or less
B=3.2 [0.126] or less
Lf=90.6 [3.567]
B=3.7
[0.146] over
entire length
Set length / load
(mm [in.]/N{kgf} [lbf])
56.0 [2.20]/137 to 152
{14 to 15.5}
[31 to 34]
P/N:
37504-20500
Outer
spring
Free length 96.57
[3.8020]
93.92
[3.698]
Squareness
A=2.5° or less
B=4.2 [0.165] or less
Lf=96.57 [3.8020]
B=4.9
[0.193] over
entire length
Set length / load
(mm [in.]/N{kgf} [lbf])
62.0 [2.44]/496 to 549
{50.6 to 56.0}
[112 to 123]
Push rod Runout 0.50 [0.0197] or less TIR
Valve
margin
Valve
sinkage
Valve
seat angle
Seat width
B
Lf
A
B
Lf
A
B
Lf
A

Mitsubishi S6R Series Specifications

General

Brand	Mitsubishi
Model	S6R Series
Category	Engine
Language	English