Disassembling And Inspecting Cylinder Block, Crankshaft, Piston And Oil Pan - Mitsubishi L Series Service Manual

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

Piston ring wear,
damage, end gap
Piston wear, sticking,
streaks, ring groove wear
Cylinder flaws,
stepped wear
Top face distortion
Plug, dowel pins damage,
clogging or contamination
of oil/water holes
Flaking, scratches, seizure
Crankshaft gear teeth
damage,
sticking to bearing
Journal, pin damage,
local wear, cracks, bend,
clogged oil hole

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 crankcase, carefully remove parts (relief valve, etc.) mounted on the non-reusable crankcase so that
they can be reused.
7
8
9
10
6
Flaking,
5
scratches,
seizure
11
Flaking, scratches, seizure
4
3
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
DISASSEMBLY OF BASIC ENGINE
Connecting rod bend,
twist, big end thrust
clearance
Replace: Side seal
16
2
15
14
1
12 Main bearing cap
13 Lower main bearing
14 Crankshaft
15 Upper main bearing
16 Cylinder block
13 Flaking, scratches,
seizure
12
Replace:
Oil pan gasket
5-15