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What is the method for bleeding the coolant in a BMW 320?

1 Answers

MarianaFitz

07/29/25 9:52am

The method for bleeding air from the radiator of a BMW 3 Series is as follows: After filling with coolant, start the vehicle and let it idle. The coolant level will drop, and bubbles will emerge. Continuously top up the coolant until the level stabilizes and no more bubbles appear. Finally, fill the coolant to the specified level. How to choose coolant: The basic indicators of coolant are its freezing point and boiling point. On the market, coolants are available with freezing points of -15°C, -25°C, -30°C, -40°C, etc. Generally, it is advisable to choose a coolant with a freezing point at least 10°C lower than the lowest temperature in your region. Methods to determine if coolant is low: Observe the coolant warning light on the dashboard. If it lights up, it is likely due to low coolant, though it could also be caused by excessively high cylinder temperatures. Check the coolant reservoir. If the level is below the minimum mark (MIN), do not continue driving and add coolant promptly. Check the water level markings on the coolant reservoir. The normal coolant level should be between the maximum and minimum marks. To determine if coolant is low, check the markings. If the coolant is below the minimum mark, it indicates a shortage.

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