Radiator Cap - 31511 Features & Benefits: All Gates radiator pressure caps are constructed of corrosion-resistant, heavy-gauge metal. This assures long service life and accurate control of pressure. Can be used for applications with or without coolant recovery systems. Safety release lever. Protects against accidental burns by releasing steam through overflow tube. Common Applications Include: Make Model Year Range Engine Base Cadillac Eldorado 1957-1958 V-8 365 Cadillac Eldorado 1959-1963 V-8 390 Cadillac Fleetwood 1949-1955 V-8 331 Cadillac Fleetwood 1956-1958 V-8 365 Cadillac Fleetwood 1959-1963 V-8 390 Cadillac Fleetwood 60 Special 1949-1955 V-8 331 Cadillac Fleetwood 60 Special 1956-1958 V-8 365 Cadillac Fleetwood 60 Special 1959-1963 V-8 390 Cadillac Series 61 1949-1951 V-8 331 Cadillac Series 62 1949-1955 V-8 331 Cadillac Series 62 1956-1958 V-8 365 Cadillac 6200 1959-1963 V-8 390 Product Specifications: Attachment Type Cam On Cap Depth (IN) 1.48 Cap Finish Stainless Steel Color Silver Coolant Recovery System Optional System Filler Neck Depth (IN) 0.75 Filler Neck Inside Diameter (IN) 1.61 Filler Neck Outside Diameter (IN) 2.13 Height (IN) 1.48 Lever Type Yes Quick Pressure Release Yes Shell Outside Diameter (IN) 2.61 Type Safety Release Cap Valve Outside Diameter (IN) 1.54 Width (IN) 2.25