Gates 31549 Radiator Cap

OE Type Radiator Cap for Closed Systems

The Gates 31549 OE Type Radiator Cap is built for closed coolant recovery systems that require a threaded coolant bottle cap with a 21 psi pressure rating. It is engineered to match OEM specifications in form, fit, and function for dependable cooling system pressure control.

Designed for a wide range of Ford, Lincoln, Volvo, Land Rover, Jaguar, and Mazda applications, this Gates radiator cap supports proper system sealing on vehicles such as the Ford F-150, Ford Escape, Volvo XC60, and Lincoln Navigator. The Gates 31549 is a direct-fit OE-style replacement for many late-model and earlier cooling system applications.

Key Features

• OE Type Radiator Cap for closed coolant recovery systems
• Threaded coolant bottle cap design
• 21 psi pressure rating with SAE pressure range of 18-22 psi
• Corrosion-resistant construction for long service life
• Built to meet or exceed OEM specifications in function, form, and fit
• Fits filler neck dimensions of 1.49 in inside diameter, 1.98 in outside diameter, and 1.29 in depth
• Shell diameter measures 2.46 in with a cap depth of .71 in

Product Details

Gates OE Type Radiator Cap 31549 is manufactured with corrosion-resistant heavy-gauge metal or high-quality plastic, depending on application, to help maintain accurate pressure control in the cooling system. The cap is intended for closed-system coolant recovery setups and is specified for vehicles that require a threaded coolant bottle cap with OE performance characteristics. This part cross-references Wix 33081 for the same application.

Common fitment includes Fits 2015-2025 Ford F-150, N/A; Fits 2013-2025 Ford Escape, N/A; Fits 2010-2024 Volvo XC60, N/A; Fits 2019-2024 Lincoln Navigator, N/A; and Fits 2004-2013 Mazda 3, N/A. It also appears in applications for the Ford Bronco, Ford Explorer, Ford Transit, Lincoln Aviator, Volvo XC90, and Land Rover Discovery Sport.

What This Part Helps Address

• Loss of cooling system pressure from a worn or damaged cap
• Coolant overflow or recovery issues in closed systems
• Improper sealing at the coolant bottle filler neck
• Pressure-related cooling performance concerns
• Replacement needs for OE-style radiator cap service

Installation Notes and Tips

Verify the filler neck dimensions, thread style, and pressure rating before installation. This cap is specified for closed coolant recovery systems and should be matched to the vehicle’s original cooling system requirements. Confirm application details for Ford, Lincoln, Volvo, Land Rover, Jaguar, and Mazda models before replacing the existing cap.

Quality Assurance

Gates manufactures this radiator cap to meet or exceed OEM specifications and environmental regulatory standards. The design focuses on accurate pressure control, corrosion resistance, and OE-style fitment for consistent cooling system service.