2. Loosen or remove the bleed screws located on the thermostat housing cover and, where applicable, on the heater hose at the engine compartment bulkhead (see photos).
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3. Slowly pour the liquid into the expansion tank, while simultaneously monitoring the drain screw holes (see photo). As soon as liquid free of air bubbles starts to flow out of them, install them in place and tighten the screws.
4. Add fluid to the expansion tank so that its level rises to the filler neck. There will still be air remaining in the system that needs to be removed as follows.
5. Start the engine and let it run at fast idle for several minutes. Turn off the engine.
6. Add fluid to the expansion tank up to the maximum level mark. Some models have markings on the tank wall, while others have a special measuring plate or tube that is visible through the filler hole and indicates both the minimum and maximum fluid levels (see photo).
7. Replace the tank cap.
8. Start the engine and let it warm up to normal operating temperature (a sign is the fan turning on, which, after working for some time, turns off).
(Information copied from the resource: «PeugeotBook.ru»)
9. Turn off the engine and let it cool for at least 1 hour.
10. Check the coolant level again (see paragraph 6) and top it up if necessary.