Sierra 18-3570 Water Pump Kit Sierra Water Pump Kit Meets or exceeds the original equipment quality Sierra part number: 18-3570 Contains the following: 18-2599 Face Seal and Tool, 18-3056 Impeller, 18-3122 Impeller Plate, 18-7420 O-Ring, 18-2944 Seal Ring Gasket, 18-2945 Drain Screw Gasket, 18-2564 Water Pump Gasket, 18-2566 Cover Gasket