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ENGINE INTRODUCTION (J08E)
EN01–6
Piston seizure
NOTICE
If piston seizure occurs, the problems above will occur. Complaints from the customer are often related to these prob-
lems.
.
1.
White smoke is emitted.
2.
Lack of power
Symptom
Possible cause
Remedy/Prevention
Piston seizure (Pistons, cylinder lin-
ers and piston rings)
Incorrect clearance between piston
and cylinder liner
Replace piston, piston rings and cylin-
der liner
Unsatisfactory installation of piston pin
Replace piston, piston rings, cylinder
liner and piston pin as required
Broken piston ring
Replace piston, piston rings and cylin-
der liner
Difference in expansion due to use of
wrong piston
Replace piston, piston rings and cylin-
der liner
Piston seizure (Coolant)
Reduction in capacity of coolant pump
(due to vane corrosion)
Replace the coolant pump
Leakage of coolant
Repair
Insufficient coolant
Add coolant
Dirty coolant
Clean and replace coolant
Defective radiator (coolant leakage,
clogging)
Repair or replace the radiator
Defective rubber hose (leakage)
Replace rubber hose
Defective thermostat
Replace the thermostat
Leakage of exhaust into cooling sys-
tem
Repair
Piston seizure (Operation)
Abrupt stoppage of engine after run-
ning at high speed
Operate engine properly
Hill climbing using unsuitable gear
Select suitable gear
Piston seizure (Oil)
Insufficient oil
Add oil
Dirty oil
Change oil
Poor quality oil
Replace with proper engine oil
High oil temperature
Repair
Low oil pressure
Repair
Defective oil pump
Repair oil pump
Reduced performance due to worn oil
pump
Replace oil pump
Suction strainer sucking air
Add oil and/or repair strainer
Piston seizure (Abnormal combus-
tion)
Use of defective fuel
Change fuel
Engine overheating
See Symptom:
"Engine overheating"
Breakdown of injector
Replace the injector