Flushing the cooling system (Peugeot 305)

1. If the coolant is contaminated with deposits and rust, the system must be flushed.

2. Drain the coolant (see previous section).

3. Remove the thermostat (see section 8).

4. If not already done, disconnect the lower hose from the radiator.

5. Insert a garden hose into the thermostat housing so that water flows through the motor in the opposite direction and exits through the hole for the lower hose. Continue rinsing until the water running out is clear.

(Information copied from the resource: «PEUGEOTBOOK.ru»)

6. Insert a garden hose into the upper radiator hose and flush the radiator in the normal direction of flow. If the radiator is particularly dirty, it may be helpful to remove it, turn it over and rinse it in the opposite direction.

7. Descaling agents and chemical detergents should only be used as a last resort and the manufacturer's instructions should be strictly followed when using them.

8. Once flushing is complete, reinstall the thermostat and reconnect the hoses.