How many liters of coolant does a BMW 3 Series need?
2 Answers
BMW 3 Series requires 4 liters of coolant. Coolant is a type of cooling liquid containing special additives, primarily used in liquid-cooled engine cooling systems. It offers excellent performance in preventing freezing in winter, boiling in summer, and protecting against scale and corrosion throughout the year. How to replace coolant: Before completely replacing the coolant, conduct a thorough inspection to check for any signs of leakage or cracks in the pipes, with a particular focus on the five-way hose. Coolant flows through the five-way hose before being distributed to different parts of the car to perform its function. If there is any leakage of coolant in this section, replace the hose or re-secure the connection as needed. Drain the old coolant, then flush the liquid channels with clean water. Add clean water to the coolant reservoir and continue filling it until the water flows continuously through the engine cooling system. Then, start the engine and let it idle for 3 to 5 minutes to circulate the water. The initial water flowing out of the reservoir may have a faint pink color. Continue adding clean water until the outflowing water is clear. Note: Don’t forget to remove the heater hose and drain the water from the heater core. Approximately one hour after draining, add the new coolant through the radiator hose. Then, pour another bottle of coolant into the coolant reservoir until it is nearly full. Start the engine and let it run for about 10 minutes. During this time, the coolant level will drop slightly as air is purged from the cooling system. Add more coolant until it reaches the "MAX" mark on the reservoir.
As a car owner who often tinkers with my own vehicle, I know that the BMW 3 Series typically requires about 6 to 7 liters of coolant, depending on the engine model. For example, last time I added 6.5 liters to my F30. Before adding coolant, make sure the system is drained of the old fluid, otherwise the effectiveness will be poor. Coolant not only prevents freezing but also protects against boiling and extends engine life. I recommend checking the exact amount in the manual first, as it may vary for different model years. If you don’t have the manual, you can use the dipstick to check the fluid level initially. When replacing it yourself, choose the right specialized type and avoid mixing different brands to prevent sediment buildup and clogging. After adding, start the car for 10 minutes to let the system circulate and check for leaks to avoid issues later. Saving money is a benefit, but carelessness can damage the engine. Beginners can consult experienced drivers for help.
