|
Symptom
|
Check items
|
Cooling system parts malfunction
|
Poor heat transfer
|
Water pump malfunction
|
Worn or loose drive belt
|
—
|
Thermostat stuck closed
|
—
|
Damaged fins
|
Dust contamination or paper clogging
|
Physical damage
|
Clogged radiator cooling tube
|
Excess foreign material (rust, dirt, sand, etc.)
|
Reduced air flow
|
Cooling fan does not operate
|
Fan assembly
|
—
|
High resistance to fan rotation
|
Damaged fan blades
|
Damaged radiator shroud
|
—
|
—
|
—
|
Improper engine coolant mixture ratio
|
—
|
—
|
—
|
Poor engine coolant quality
|
—
|
Engine coolant density
|
—
|
Insufficient engine coolant
|
Engine coolant leakage
|
Cooling hose
|
Loose clamp
|
Cracked hose
|
Water pump
|
Poor sealing
|
Radiator cap
|
Loose
|
Poor sealing
|
Radiator
|
O-ring for damage, deterioration or improper fitting
|
Cracked radiator tank
|
Cracked radiator core
|
Reservoir tank
|
Cracked reservoir tank
|
Reservoir tank cap
|
Loose
|
Poor sealing
|
Overflowing reservoir tank
|
Exhaust gas leakage into cooling system
|
Cylinder head deterioration
|
Cylinder head gasket deterioration
|
Except cooling system parts malfunction
|
—
|
Overload on engine
|
Abusive driving
|
High engine rpm under no load
|
Driving in low gear for extended time
|
Driving at extremely high speed
|
Power train system malfunction
|
—
|
Installed improper size wheels and tires
|
Dragging brakes
|
Improper ignition timing
|
Blocked or restricted air flow
|
Blocked bumper
|
—
|
—
|
Blocked radiator grille
|
Installed car brassiere
|
Mud contamination or paper clogging
|
Blocked radiator
|
—
|
Blocked condenser
|
Blocked air flow
|
Installed large fog lamp
|