12 INTERNAL COMBUSTION ENGINES; NAMELY, DIESEL ENGINES, FOR CARS, TRUCKS AND VANS, AND PARTS THEREFOR; NAMELY, BLOCKS, HEADS, CONNECTING RODS, VALVES, VALVE KEEPERS, VALVE SPRINGS, OIL PANS, VALVE COVERS, SHIELDS FOR BELTS, SHIELDS FOR PULLEYS, SHIELDS FOR GEARS, SHIELDS FOR CHAINS AND SHIELDS FOR SHAFTS, DRIVE SHAFTS, CAM SHAFTS, ACCESSORY DRIVE PULLEYS, TIMING GEARS, ROCKER ARMS, CRANK SHAFTS, ROCKER SHAFTS, WATER PUMPS, FUEL PUMPS, CAM SHAFT BEARINGS, CRANK SHAFT BEARINGS, CLUTCHES, AND BELL HOUSINGS