1-10 SCHEDULED MAINTENANCE REPLACING OXYGEN SENSOR Oxygen sensor is as a fuel mixture control unit, if it is damaged, exhaust gas will be bad as well as engine performance. So, if the oxygen sensor is defected, necessarily replace it. L4GC215A COOLING SYSTEM Check the cooling system hoses for damage and looseness or inspect the joints for coolant leaks. COOLANT When the engine is delivered, the engine cooling system con- tains mixture of antifreeze(40%) and water(60%). Because the cylinder head and the water pump are made of aluminum alloy, the mixture should contain antifreeze (ethylene glycol) of 30~60% to prevent those from corrosion, freezing and bursting.
NOTE If the coolant contains less than 30% of antifreeze, anticorrosion is decreased. If the coolant contains more than 60% of antifreeze, the engine will be fatally affected, re- sulting from decreased anti-freezing and engine cooling. Use only the recommended antifreeze and do not mix with other production. Recommended antifreeze Ethylene glycol