How to Bleed Air from the BMW 5 Series Radiator?
2 Answers
Fill the coolant to the maximum level, then insert the key and turn on the ignition switch without starting the engine; Set the air conditioning to the highest temperature in heating mode and adjust the fan speed to the lowest setting; Turn on the daytime running lights by moving the headlight switch one position to the right; press the accelerator pedal all the way down for about 10 seconds to complete the process.
Oh, about bleeding the cooling system on a BMW 5 Series—I've driven this car for years, and you gotta follow the steps carefully. First, park the car, turn it off, and wait until it's completely cooled down—hot coolant can be dangerous. Then locate the expansion tank cap in the engine bay, usually near the front center. Before opening it, make sure you have fresh coolant ready. Start the engine and let the temperature rise to the normal operating range, around 90 degrees Celsius. Slowly add coolant while watching for bubbles to rise. Stop only when no more bubbles appear. Take your time—keep the fluid level steady while topping up. Finally, tighten the cap and take a short drive to check if the temperature stays stable. During regular maintenance, always check the coolant level to prevent engine overheating and cylinder scoring. Don’t overlook these small details—proper maintenance extends engine life, ensures smoother highway driving, and saves you money in the long run.
