11
11-89
Disassembly sequence
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.
M
itsubishi 6M70 Service standards (Unit: mm)
M
itsubishi 6M70 Tightening torque (Unit: N·m {kgf·m})
Location Maintenance item Standard value Limit Remedy
6, 15 Main bearing
Oil clearance 0.06 to 0.122 0.25 Replace
Span when free – 106.5 Replace
12 Crankshaft
End play 0.09 to 0.23 0.4
Replace thrust
plate
Bend 0.04 or less 0.1 Replace
Pins and journals
Roundness 0.01 or less 0.03 Rectify or replace
Cylindricity 0.006 or less – Rectify or replace
Center-to-center distance between
the journal and pin
75 ± 0.07 – Replace
Journal width 42 ± 0.3 – Replace
Pin width 54 – Replace
Fillet R5 – Replace
19 Crankcase
Distortion of top surface 0.07 or less 0.2 Rectify or replace
Cylinder block
Roundness 0.005 or less –
Replace
Cylindricity 0.015 or less –
Mark Parts to be tightened Tightening torque Remarks
Bolt (crankshaft pulley installation) 240 {24} –
Bolt (front cover installation) 45 {4.6} –
Bolt (main bearing cap installation) 100 {10} + 130 ± 2°
• Wet
• Can be reused
up to 3 times
Check valve 34 {3.5} –
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
9 Ring
10 Rear oil seal slinger
11 Crankshaft gear
12 Crankshaft
13 Rear plate
14 Gasket
15 Upper main bearing
16 Check valve
17 Oil jet
18 Oil spray plug
19 Crankcase
: Locating pin
: Non-reusable parts
+0.2
0
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