Abstract: A power steering pump and water pump assembly is disclosed. The assembly includes a power steering pump with a rotating shaft and a water pump. The water pump has a housing and a rotatable shaft for driving an impeller, which is mounted on an inner end of the shaft. An outer end of the water pump shaft engages the shaft of the power steering pump, and the power steering pump shaft drives the water pump shaft. The water pump may include a seal and a bearing having an inner race and outer race for supporting an outer end of the water pump shaft and cantilevering the shaft to support and journal the impeller. The shaft of the power steering pump may engage the shaft of the water pump through engagement of male and female torque transmitting profiles that axially slide together.