110 ENGINE COMPONENT AND LOCATION Cooling System The cooling system incorporates a belt-driven coolant pump mounted on the front of the engine on the right. It also uses a piston-type thermostat housed in the front of the cylinder head and a fan with viscous or air-operated drive mounted above the crankshaft pulley. A coolant conditioner (filter) attached to the pump housing filters impurities from the coolant and releases supplemental coolant additives for system protection. Coolant Pump W2033363 1. Impeller Housing 3. Coolant Pump Mounting Plate 2.
Coolant Pump Seal The back of the coolant (water) pump, with its ducts for distributing coolant, is a separate casting attached to the cylinder block. A housing containing an impeller, shaft seals, bearing and pulley attaches to the mounting plate. The bearing is a permanently lubricated combination roller and ball bearing. Between the shaft seals and the bearing, there is a ventilated space which leads into a duct behind the pulley. This allows internal leaks to be detected.