2. The radiator must be flushed independently of the engine to avoid external contamination.
3. To flush the radiator, disconnect the top hose from it and attach a garden hose to the inlet. Direct a stream of clean water through the radiator and flush it until water comes out of the outlet (the lower hose is disconnected at the system drain) no clear water will flow. If after a period of time the flowing water 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) pipe of the radiator and flush the radiator in the opposite direction.
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 upper and lower radiator hoses disconnected, insert a garden hose into the lower radiator hose. Run clean water through the engine and flush the cooling jacket until clear water runs out of 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. With the lower hose disconnected from the radiator, insert a garden hose into it. Run clean water through the engine and flush until clean water runs out of the thermostat housing. It is recommended to place some kind of plastic shield under the thermostat housing to direct 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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