Draining the coolant (see Coolant replacement). Removing the timing belt (see Checking the condition and replacing the timing belt).
With the "10" head, we unscrew the four bolts securing the bracket of the right support of the power unit (for clarity shown on the removed engine) …
... and remove the bracket.
With the "12" head, we unscrew the bolt of the lower fastening of the rear timing cover.
With the "10" head, we unscrew the second bolt of the lower..
... and two bolts for the upper fastening of the rear timing cover.
Remove the rear timing cover.
With a "5" hexagon, unscrew the three screws securing the pump.
Remove the coolant pump.
Remove the pump seal.
Before installing the pump, we clean the mating surface of the cylinder block. We install a new rubber sealing ring in the groove of the pump housing. During the subsequent adjustment of the timing belt tension, it is necessary to turn the pump installed in the socket of the cylinder block. Therefore, in order to preserve the sealing properties of the ring, we recommend applying a layer of silicone lubricant to it, which reduces friction in moving joints.
Install the coolant pump in reverse order.
In this case, it is necessary to ensure that the groove on the pump housing is located as shown in the photo.
The final tightening of the pump mounting screws is carried out after installing the timing belt (see Checking the condition and replacing the timing belt).