Gates 31406 Radiator Cap

OE Type Radiator Cap for Closed Cooling Systems

The Gates 31406 OE Type Radiator Cap is built for closed coolant recovery systems that require accurate pressure control and a threaded coolant bottle cap design. With a 16 psi pressure rating and OE performance comparison, it supports proper cooling system sealing for a wide range of Ford, Lincoln, Jaguar, Nissan, Land Rover, Mazda, Mercury, and INFINITI applications.

Gates OE Type Radiator Cap 31406 is engineered to meet or exceed OEM specifications for function, form, and fit. It uses corrosion-resistant heavy-gauge metal or high-quality plastic, depending on application, to help deliver long service life and consistent pressure regulation.

• Part number: 31406
• OE Type Radiator Cap for closed coolant recovery systems
• 16 psi pressure rating with 14-18 psi SAE pressure range
• Threaded coolant bottle cap design
• Filler neck inside diameter: 1.31 in. / 33 mm
• Filler neck outside diameter: 1.99 in. / 51 mm
• Filler neck depth: .75 in. / 19 mm
• Shell diameter: 3.3 in.
• OE performance rating for factory-style fit and function

Detailed Product Overview

This Gates radiator cap is a direct-fit style replacement for vehicles that use a closed system pressure cap, including many Ford Explorer, Ford F-150, Ford Expedition, Lincoln Navigator, Jaguar XF, and Jaguar F-Pace applications. The 31406 helps maintain the cooling system pressure needed for stable coolant circulation and proper overflow recovery in OE-style setups.

This part cross-references Dorman - HELP 46046 and Wix 33045 for the same application.

Common Cooling System Issues It Can Address

• Loss of coolant pressure from a worn or weak cap
• Coolant overflow or recovery system sealing problems
• Pressure instability in a closed cooling system
• Improper cap fit on the filler neck
• Cooling system service needs on Ford, Lincoln, Jaguar, and related models

Installation Notes and Tips

Verify the filler neck dimensions, cap depth, and pressure rating before installation. This cap is specified for closed coolant recovery systems and threaded coolant bottle applications, so matching the original design is important for proper sealing and pressure control. Confirm vehicle-specific fitment for models such as Ford Explorer, Ford Taurus, and Lincoln MKT before replacement.

Quality Assurance

Gates manufactures this radiator cap to meet or exceed OEM specifications in function, form, and fit. Corrosion-resistant construction and OE performance standards support consistent operation in the cooling system.