Mitsubishi S12A2 User Manual

5-17
Chapter 5 DISASSEMBLY OF BASIC ENGINE
4. Cylinder Liner, Piston and Connecting Rod - Disassemble and Inspect
Understanding of the current engine condition before disassembling is very important to know the cause of trouble and do the
efficient work.
Depending on the maintenance work or purpose, it is desirable to inspect some of the following items before proceeding with
any job.
Piston Protrusion - Measure
Connecting Rod End Play - Measure
Cylinder Liner Inside Diameter - Measure
Cylinder Liner Flange Protrusion - Measure
Cylinder Liner, Piston and Connecting Rod - Disassemble and Inspect
12
11
10
9
8
7
6
5
4
3
2
1
Crack, oil hole clogging
Outer peripheral surface scratch,
crack, flaw, carbon deposit
Inner face wear,
flaw, discoloration
Inner and outer
peripheral
surface flaw,
seizure, peeling
Replace.
Deformation, wear
Wear, flaw
Flaw
Serrated portion
wear, crack
Inner face scratches/wear,
outer peripheral O-ring
groove rust/cavitation
Disassembling Sequence
1 Connecting rod cap bolt
2 Connecting rod cap
3 Lower connecting rod bearing
4 Upper connecting rod bearing
5 No. 1 compression ring
6 No. 2 compression ring
7 Oil ring
8 Snap ring
9 Piston pin
10 Piston
11 Connecting rod
12 Cylinder liner (Approx 16 kg [35 lb])

Mitsubishi S12A2 Specifications

General

Brand	Mitsubishi
Model	S12A2
Category	Engine
Language	English