Mitsubishi S4Q User Manual page 154

CAUSES OF ENGINE PROBLEMS AND
REMEDIES
Problems/Symptoms
Possible causes
Seizing of moving parts
Worn cylinder(s), piston(s) or
piston ring(s)
Worn piston ring(s)
Excessive oil clearance
Loose connecting rod cap
bolts
Interference between valve(s)
and piston(s)
Damaged valve spring(s)
Excessive valve clearance
Foreign item in cylinder(s)
Excessive gear backlash
154 / 174
Hard starting
Engine
Engine turns
does
not turn
⊗ ⊗
__ __ __ __
⊗
__ __ __ __ __
⊗
__ __ __ __ __
__ __ __ __ __ __
__ __ __ __ __ __
⊗
__ __ __ __ __
⊗
__ __ __ __ __
__ __ __ __ __ __
⊗
__ __ __ __ __
__ __ __ __ __ __
ENGLISH
•
( Refer to the separate troubleshooting chart.)
Exhaust
Not enough
power
abnormal
⊗
__ __ __ __ __
⊗ ⊗
__ __ __ __
⊗ ⊗
__ __ __ __
__ __ __ __ __ __
__ __ __ __ __ __
__ __ __ __ __ __
⊗ ⊗
__ __ __ __
⊗
__ __ __ __ __
__ __ __ __ __ __
__ __ __ __ __ __
Service Manual Mitsubishi SQ-Series diesel engines
TROUBLESHOOTING
smoke
In
operation
⊗ ⊗ ⊗
__ __
⊗ ⊗ ⊗
__ __
⊗ ⊗
__ __ __
⊗
__ __ __ __
⊗
__ __ __ __
⊗
__ __ __ __
⊗ ⊗ ⊗
__ __
⊗ ⊗ ⊗
__ __
⊗
__ __ __ __
⊗
__ __ __ __
Version 08/2004
Engine
hunts
__ __
__ __
__ __
__ __
__ __
__ __
⊗ ⊗
⊗ ⊗
__ __
__ __