Models 316i, 318i, 320i, 323i, 328i
Withdrawal
1. Drain the coolant, refer to Section Coolant replacement.
2. Remove the V-belt, refer to Section Removing, installing and tensioning the V-belt.
3. Turn away bolts of fastening of a pulley. At the same time, keep the pulley from rotating. Remove the pulley from the hub.
4. Turn out 4 bolts of fastening of the pump of a cooling liquid.
5. Screw 2 M6 screws into the threaded hole (arrows in the illustration) and thus evenly remove the coolant pump from the engine. Make sure that the pump does not warp.
Installation
6. Clean the sealing surfaces on the motor.
7. Turn out removable bolts from the pump.
8. Replace pump o-ring and lubricate new o-ring with lubricant before installation.
9. Insert pump with new seal and tighten evenly. The tightening torque depends on the thread diameter. Please refer to Specifications.
10. Fix the pulley by tightening the 4 bolts to 15 Nm.
11. Install the V-belt, refer to Section Removing, installing and tensioning the V-belt.
12. Fill the system with coolant, refer to Section Coolant replacement.
13. Start and warm up the engine. Check the cooling system for leaks.
Models 320d
Withdrawal
14. Drain the coolant, refer to Section Coolant replacement.
15. Remove the V-belt, refer to Section Removing, installing and tensioning the V-belt.
16. Turn away a hose of a cooling liquid from above the pump at a head of cylinders and the holder.
17. Disconnect the pump -1- and remove together with the sealing gasket -2-. Pay attention to the position of both guide sleeves -3-.