Draining the coolant (Peugeot 305)

1. When the engine is cold, remove the radiator cap by turning it counterclockwise. When the engine is hot, first loosen the plug slightly to relieve pressure from the system. The cork should be handled through a rag to avoid getting burned. Once the pressure has been released, the plug can be removed.

2. If antifreeze is used in the cooling system, the liquid must be drained into a suitable container (not less than 7 liters) for reuse.

3. Open the drain cock located at the front bottom of the radiator (see photo). Install the heater controller (on the dashboard) to the maximum heating position.



4. After all the liquid has drained, clean the drain valve with a wire to make sure it is not clogged.

Source of the article is website [peugeotbook.ru]

5. Keep in mind that without disassembling the cooling system, it is impossible to completely drain all the liquid, since some of it will still remain in the heater core. If antifreeze is not added to the water, even after draining the liquid in winter, the heater core may rupture.

6. If you are going to reuse the drained coolant, you should cover the container to prevent dirt from getting into it.

Draining the coolant on XU engines

1. Draining the coolant is done in the same way as above, but you should also remove the expansion tank cap and the drain plug of the engine water jacket (located immediately above the intermediate bearing of the drive shaft).