11-62
Mitsubishi 6M70 Piston and Connecting Rod
Disassembly sequence
1 1st compression ring
2 2nd compression ring
3 Oil ring
4 Snap ring
5 Piston pin
6 Connecting rod bushing
7 Connecting rod bolt
8 Connecting rod
9 Piston
: Non-reusable parts
Assembly sequence
Follow the disassembly sequence in re-
verse.
M
itsubishi 6M70 Service standards (Unit: mm)
Lubricant and/or sealant
Location Maintenance item Standard value Limit Remedy
1 to 3 Piston ring end gap
1st compression ring 0.4 to 0.55
1.5 Replace2nd compression ring 0.5 to 0.65
Oil ring 0.4 to 0.6
1 to 3, 9
Clearance between
piston ring and piston
ring groove
1st compression ring 0.015 to 0.06 0.15
Replace2nd compression ring 0.085 to 0.125 0.25
Oil ring 0.025 to 0.065 0.15
5, 6 Clearance between piston pin and connecting rod bushing 0.02 to 0.055 0.1 Replace
5, 9 Clearance between piston pin and piston 0.004 to 0.022 0.1 Replace
8 Connecting rod
Bend – 0.05
Replace
Twist – 0.1
Mark Points of application Specified lubricant and/or sealant Quantity
Outer periphery of piston pin
Engine oil As required
Outer periphery of connecting rod bushing
Connecting rod bushing mounting surface of connecting
rod
Connecting rod bolt mounting hole
PISTON, CONNECTING ROD AND CYLINDER LINER
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