What Causes Low Water Level in the BMW 3 Series Expansion Tank?
1 Answers
For low water level in the BMW 3 Series expansion tank, check if the thermostat is faulty, leading to abnormal water temperature and overflow from the expansion tank. Car expansion tank maintenance steps are as follows: Park the vehicle and turn off the engine. After the coolant temperature has cooled down, open the expansion tank and add radiator cleaner. Start the engine and let it idle for 5-10 minutes after the cooling fan activates. Turn off the engine and remove the front bumper. Ensure all fixing screws are loosened during removal, and carefully detach from both ends toward the center to avoid breaking the clips. Once the coolant has completely cooled, drain the radiator cleaner along with the coolant, and finally replace it with new engine coolant. Car Expansion Tank: Also known as the radiator, it is a key component in the vehicle's cooling system. The radiator is a crucial part of water-cooled engines, serving as an essential element in the engine's cooling circuit to absorb heat from the cylinder block. It prevents engine overheating. Due to water's high specific heat capacity, its temperature does not rise significantly after absorbing heat from the cylinder block. Thus, the engine's heat is dissipated through the liquid cooling circuit, using water as a heat-transfer medium. The heat is then released via large cooling fins through convection, maintaining the engine at an optimal operating temperature.
