Disassembling And Inspecting Cylinder Block, Crankshaft, Piston And Oil Pan - Mitsubishi Heavy Industries SL Series Service Manual

DISASSEMBLY OF BASIC ENGINE

4. Disassembling and inspecting cylinder block, crankshaft, piston and oil pan

Piston ring wear, damage,
Ring gap clearance
Piston wear, seizure,
streak, ring groove wear
Damaged plugs and
knock pins
Pealing

Disassembling and inspecting cylinder block, crankshaft, piston and oil pan

Disassembling sequence
1 Oil pan
2 Oil screen
3 Connecting rod cap
4 Lower connecting rod
bearing
5 Connecting rod
6 Piston pin
Note: When replacing the cylinder block, carefully remove parts (relief valve, etc.) mounted on the non-reusable cylinder block
so that they can be reused.
5-12
7
8
9
10
6
5
11
16
Damaged crankshaft
gear teeth
Scoring
4
Seizing
3
Replace
2
7 No.1 compression
8 No.2 compression
9 Oil ring
10 Piston
(Remove parts 5 to 10 as a unit)
11 Upper connecting rod
bearing
Connecting rod bend, twist,
Big end thrust clearance
12 Main bearing cap
13 Lower main bearing
14 Crankshaft
15 Upper main bearing
16 Cylinder block
Cylinder damage,
stepped wear
Top face distortion
Dirty or clogged oil and
water galleries
15 Crank journal/pin damage,
uneven wear, cracks, bend,
Clogged oil hole
14
Caution
The main bearings may be seized
due to poor oil maintenance etc.
In that case, the crankshaft must
be replaced.
13
12
Replace
1