After the car has traveled a certain mileage, the engine cooling system should be cleaned and dirt removed in conjunction with maintenance operations.

When cleaning, first drain the coolant, then add clean water, screw on the radiator cap, start the engine, and after it warms up to normal operating temperature, stop and drain the water. If the discharged water is seriously dirty, it should be cleaned again until the discharged water becomes clean. If the cooling system is really dirty, the cooling system must be backflushed.

The method is: use compressed air to force the water flow in the opposite direction of the normal water flow to forcefully flush the engine.