Remove fan from pulley (usually using a big special open end wrench) turning clockwise with you in front of the car/engine. Loosen bolts holding pulley to water pump (but do not remove bolts and pulley yet). Adjust fan belt tensioner to remove alternator belt (there is a plastic cover in the middle of the tensioner pulley under which is a bolt usually torx 50 with which you can adjust the pulley pulling clockwise/to the right). Proceed to remove bolts and pulley from water pump. Remove bolts from water pump. Put 2 screws into the empty/previously unused holes in the sides of the water pump to pull it out. Remove and replace water pump. Refill with coolant. Bleed cooling system to remove air from the system.
Follow the instruction manual Drain the water first then remove the timing case release the tension from the belt, unbolt it and remove.