1.2L REVOTRON ENGINE 16 6. Cooling System Condition Possible Cause Remedy Overheating Low coolant level/ Cooling system leaking Check coolant level in reservoir and inspect system for leaks. Add coolant as necessary. Defective thermostat Remove thermostat and check for proper opening at specified temperature. Defective water pump Inspect and replace water pump as necessary. Defective temperature sensor unit Check coolant temperature sensor unit Replace as necessary. Engine cooling fan malfunctioning Test operation of engine cooling fan. Repair or replace as necessary. Engine overloading Make sure vehicle brakes are not dragging. Vehicle overloaded. Make sure vehicle does not exceed weight limit with cargo. Engine lean condition Verify proper operation of fuel system components. Repair system or replace components as necessary. Head gasket leaking Test engine compression. Replace head gasket as necessary. Radiator water in/out leakage or clogged Check Radiator water in/out leakage or clogged and take corrective action. Over cooling Defective thermostat Remove thermostat and check for proper opening at specified temperature. Defective temperature sending unit Check coolant temperature sensing unit. Replace as necessary. 7. Engine Lubrication System Condition Possible Cause Remedy Engine consumes oil Obstructed air filter or air Inlet Clean or replace air filter or inlet Worn piston rings Perform compression or leak-down test Worn valve guide seals or other valve train component. Inspect valve train components. Repair or replace as necessary
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