2. The radiator must be flushed independently of the engine to avoid external contamination.
3. To flush the radiator, disconnect the top hose from the radiator and attach a garden hose to the inlet pipe. Direct a stream of clean water through the radiator and flush it until the outlet (bottom hose disconnected at system drain) clean water will not flow. If, after a certain period of time, the water flowing out still does not become clear, the radiator should be flushed with a special cleaning agent, carefully following the manufacturer's instructions. If the contamination is too severe, insert a hose into the inlet (lower) radiator hose and flush the radiator in reverse.
4. To flush the engine cooling jacket, proceed as follows.
Models 1.4 and 1.6 l (except C16 NZ2)
5. Remove the thermostat as described in Chapter 9, then temporarily install the thermostat cover.
6. With the top and bottom hoses disconnected from the radiator, insert a garden hose into the bottom radiator hose. Direct a stream of clean water through the engine and flush the cooling jacket until clean water flows from the upper radiator hose.
7. After flushing, install the thermostat and connect the hoses to the radiator.
Models C16 NZ2, 1.8 and 2.0 l
8. Remove the thermostat and cover assembly as described in Chapter 9.
9. After disconnecting the lower hose from the radiator, insert a garden hose into it. Direct a stream of clean water through the engine and flush it until clean water flows out of the thermostat housing. It is recommended that a plastic shield be placed under the thermostat housing to keep water away from the engine and surrounding components.
10. After flushing, install the thermostat and cover assembly, connect the hoses and remove the plastic shield.
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