This water pump circulates coolant through the engine block and radiator to maintain operating temperature. It is driven by the engine's belt system and uses an impeller to move fluid at a consistent flow rate. A failing pump typically produces coolant leaks from the weep hole, bearing noise, or visible shaft play. The manufacturer machines the impeller and housing to match the original assembly's clearance, which keeps the coolant flow rate within the engine's design parameters. The set includes mounting bolts and a gasket; replace the gasket on reinstall and torque the mounting bolts to specification.