Where is the BMW radiator drain port located?

1 Answers
GenesisRose
07/29/25 12:23pm
BMW's radiator drain port is located under the hood. After opening the engine cover, you can see the auxiliary water tank. Lift the wire clamp on the hose slightly, then lower and disconnect the hose to allow water to drain. This process is typically used for bleeding air or replacing coolant. BMW's radiator functions as a heat exchanger for the water-cooled engine, utilizing air convection cooling to maintain the engine's operating temperature within the normal range. If the engine coolant in the radiator boils and vaporizes, causing pressure to exceed the set limit, the radiator cap releases the excess pressure to prevent cooling system pipe bursts and coolant loss. BMW's main vehicle series include the 1, 2, 3, 4, 5, 6, 7, and 8 Series.
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