2006-2009 Suzuki LT-R450 Service Manual, Page 381Get this manual
SERVICING INFORMATION
RADIATOR (COOLING SYSTEM)
Complaint Engine overheats
Engine overcools
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Symptom and possible causes Not enough engine coolant Radiator core clogged with dirt or scale Faulty cooling fan Defective cooling fan relay, or open- or shortcircuited Defective ECM Defective ECT sensor Clogged water passage Air trapped in the cooling circuit Defective water pump Use incorrect coolant Defective thermostat Defective ECT sensor Extremely cold weather Defective thermostat Defective cooling fan relay, or open- or shortcircuited Defective ECM