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OVERHEATING CAUSE ANALYSIS CO-5 C D E F G H I J K L M A CO OVERHEATING CAUSE ANALYSIS PFP:00012 Troubleshooting Chart ABS004R1 Symptom Check items Cooling sys- Poor heat transfer Water pump malfunction Worn or loose drive belt — Thermostat stuck closed — Damaged fins Dust contamination or Physical damage Clogged radiator cooling Excess foreign material Reduced air flow Cooling fan does not oper- Fan assembly — High resistance to fan rota- Damaged fan blades Damaged radiator shroud — — — Improper engine coolant — — — Poor engine coolant quality — Engine coolant density — Insufficient engine coolant Engine coolant leaks Cooling hose Loose clamp Cracked hose Water pump Poor sealing Radiator cap Loose Poor sealing Radiator O-ring for damage, deterio- Cracked radiator tank Cracked radiator core Reservoir tank Cracked reservoir tank Overflowing reservoir tank Exhaust gas leaks into Cylinder head deterioration Cylinder head gasket dete- |