BMW 11517509985 Water Pump

The engine coolant pump side is mounted at the front of the engine and within the timing chain cover. The first step is normally to remove water and air from the cooling system. Second, there is an air intake duct, cooling fan and a fan shroud: internal that should be taken off. Remove the engine drive belt as follows By turning the hex of the lever tensioner in a clockwise position while facing the engine pull the belt off the coolant pump pulley. If the belt is to be reused, then it should be tagged to show the line of rotation. Go ahead and unbolt and pull of the Coolant Pump Pulley off the pump. Then, you unbolt the four pump mounting nuts, though it is important to know that the coolant pump will be fastened by only these nuts on studs. To discharge the pump, screw in two M6 screws into the tapped bores and equally tighten until the pump is loose from the timing chain cover while the thermostat and hoses should have been removed for ease. For removal, its reverse applies with addition that the sealing O-ring and gaskets must be replaced before being slid back into position, whilst the O-ring must be lubricated during the process.