Mitsubishi 6M70 Workshop Manual page 99

Disassembly sequence
1 Crankshaft pulley
2 Front oil seal
3 Front cover
4 Front cover gasket
5 Thrust plate
6 Lower main bearing
7 Main bearing cap
8 Front oil seal slinger
CAUTION
• The check valve has been tightened using thread-locking compound and so, may deform during removal.
Once removed, the check valve must not be reused. Therefore, do not remove the check valve unless any
fault is found.
Assembly sequence
Follow the disassembly sequence in reverse.
CAUTION
• If overtightened, the check valve will not operate properly, leading to engine seizure. Be sure to tighten
the check valve to the specified torque.
• The main cap bolt is tightened within the plastic region. The number of punch marks indicates the num-
ber of times the bolt has been tightened. If there are 3 punch marks (tightened 3 times in the past), replace
the bolt.
Mitsubishi 6M70 Service standards (Unit: mm)
Location
6, 15 Main bearing
12 Crankshaft
19 Crankcase
Mitsubishi 6M70 Tightening torque (Unit: N·m {kgf·m})
Mark
Bolt (crankshaft pulley installation)
Bolt (front cover installation)
Bolt (main bearing cap installation)
Check valve
9 Ring
10 Rear oil seal slinger
11 Crankshaft gear
12 Crankshaft
13 Rear plate
14 Gasket
15 Upper main bearing
16 Check valve
Maintenance item
Oil clearance
Span when free
End play
Bend
Roundness
Pins and journals
Cylindricity
Center-to-center distance between
the journal and pin
Journal width
Pin width
Fillet
Distortion of top surface
Roundness
Cylinder block
Cylindricity
Parts to be tightened
17 Oil jet
18 Oil spray plug
19 Crankcase
: Locating pin
: Non-reusable parts
Standard value Limit
0.06 to 0.122 0.25
– 106.5
0.09 to 0.23
0.04 or less
0.01 or less 0.03
0.006 or less
75 ± 0.07
42 ± 0.3
+0.2
54
0
R5
0.07 or less
0.005 or less
0.015 or less
Tightening torque
240 {24}
45 {4.6}
100 {10} + 130 ± 2°
34 {3.5}
11
Remedy
Replace
Replace
Replace thrust
0.4
plate
0.1 Replace
Rectify or replace
– Rectify or replace
– Replace
– Replace
– Replace
– Replace
0.2 Rectify or replace
–
Replace
–
Remarks
–
–
• Wet
• Can be reused
up to 3 times
–
11-89