6. Oil Consumption Excessive
1. Excessive oil infusing
2. Continuous operation in low speed
or extremely cold state
Inspect oil leakage
Normal
Normal
Normal
Normal
Normal
Check oil quality
Replace with
specified oil
Oil leakage
External
Internal
Retighten
Replace
Check compressed
pressure
Engine disassembly
(piston, cylinder liner)
Disassemble
cylinder head
(valve stem seal)
Inspect air cleaner
Clean Replace
7. Engine Knocking
Inspect combustion of fuel & oil
(carbon residue of exhaust gas)
Unconfirmed
Inspect compressed
pressure
Inspect injection
pump
Adjust
Check fuel quality
Use specified fuel
Too low
Check valve clearance and
cylinderhead gasket for damage
Replace
Adjust
Disassemble
engine
Confirm
Disassemble
engine
Cause according to use conditions
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