Case-IH Major Engine Overhaul Kit for A504BD CID Diesel & A504BDT Turbo Diesel engines. 6 Cyl. (Engine serial number 2539000>). Standard Bore 4-5/8�, Pin: 1.7995�, Cylinder Sleeve Fire Dam: 5.189�/5.194� O.D.. Kit contains: Piston Liner Kit, Main Bearing Washer Set (8), Connecting Rod Bearing, Connecting Rod Bushing, Upper Gasket Set and Lower Gasket Set with Seals. Fits Case-IH models: 1370, 1470, 1570, 2390, 2470, 2590, 4490, W24, W24B, W36, 128D, 1450, 224B, 880C, 980B, 1370, 1470, 2390, 2470, 2590, 2670, and 4490.