Remove the alternator.

Remove the idler pulley base.

Remove the drive belt auto-tensioner.

Drain the engine coolant.

Remove the seven bolts securing the water pump, then remove the water pump (A) from under side.

Inspect and clean the O-ring groove and mating surface with the water passage.

Install the water pump with new O-ring (B) in the reverse order of removal.

Clean up any spilled engine coolant.

Install the drive belt auto-tensioner.

Install the idler pulley base.

Install the alternator.

Refill the expansion tank with engine coolant, and bleed air from the cooling system with the heater valve open.