GENERAL 2-12 Symptom Possible cause Remedy Abnormally low cool- ant temperature Thermostat defective Water wiring defective Replace Repair or replace Oil cooling system leak Loose connecting part Cracked or damaged hose, pipe, and oil cooler Retighten Replace Exhaust gas leak Loose connecting part Pipe or muffler damaged Retighten Repair or replace Abnormal noise Breakaway exhaust plate in muffler Rubber hanger damaged Pipe or muffler with body Interfered Pipe or muffler damaged Catalytic converter damaged Each connecting gasket damaged Replace Replace Repair Repair or replace Replace Replace