Mitsubishi S4S

MAINTENANCE STANDARDS
1. Maintenance Standards Table
Unit: mm [in.]
Nominal
Assembly Standard
Repair
Service
Group Inspeetion Point
Limit
Limit Remark
Value (Standard Clearance)
(Clearance)
(Clearance)
Maximum min-I, (no-load)
According to engine
Adjust governor
Minimum min", (no-lead)
specification setting.
DI
2.9 (30) [427]
2.6
Oil and water temp.
Compression
at 300 min:'
(27) [384]
20 to
30°C
pressure
3.2 (33) [469]
2.8
[68 to 86°F]
Ml'atkgf/cm') [psi]
SC
at 300 min-I
(29) [413]
0.3 to 0.5 (3 to 5) [43 to 71] 0.15 (1.5)
üil temperature
Engine oil pressure
at 1500 min:'
[21.3]
70 to 90°C
0.1
(1) [14.2] or more at
0.05 (0.5)
[158 to 194°F]
MPa (kgf/cm") [psi] idling [7]
DI SC
Inlet valves open BTDC 18°
BTDC 30°
C;
Valve timing
Inlet valves close ABDC 54°
ABDC 50°
....
Exhaust valves open BBDC 66°
BBDC 74°
(1)
c
Exhaust valves close
ATDC
22°
ATDC 30°
(1)
c
± 3° (crank angle) ± 3° (crank angle)
Valve clearance (cold)
Both in1et and exhaust
0.25 [0.0098]
valves
The timing for each
model
of engine varies
according to its speci-
Fuel injection timing fication. Be sure to
verify the timing by
referring to the speci-
fications
of each
model.
Push beIt inward with
V-belt deflection 12 [0.5], approx.
thumb pressure and
measure deflection.
,
"""'(1)
Warpage of gasket 0.05 [0.0020]
0.20
Regrind if warpage
<=:",
~~
contact surface
or 1ess [0.0079]
is minor.
Uu
Inside diameter
94
94,000 to 94,035
94.200 94.700 Refinish cylinder to
...
[3.70] [3.7008to 3.7022]
[3.7087]
[3.7283] 0.25 [0.0098] or 0.50
(1)
[0.0197] oversize of
"0
0.01 [0.0004]
.5
Circularity
>..
or less
normal value by
U
honing and use the
Taper
0.015 [0.0006]
same oversize pistons
(1)
or less
and piston rings.
'"
<:Il
u
~
If repair limit is
<=:
<:Il
reached, replace
...
U
-0.09 bearings. If is
01)
<=:
[-0.035] exceeded, regrind
.t:
Clearance between
(0.050 to 0.110)
~
(0200)
asjoumal journals and use(1)
.D
bearing and journal ([0.0020 to 0.0043]) ([0.0079])
diameter undersize bearings.
<=:
'ca
which is Bearing undersizes:
::E
78 [3.07]
0.25 [0.0098]
0.50 [0.0197]
0.75 [0.0295]
DI - Direct injection SC - Swirl chamber
2-2