Gates 31527 Radiator Cap

OE Type Radiator Cap for Reliable Cooling

The Gates 31527 OE Type Radiator Cap is built for accurate pressure control in the cooling system. With a 13 psi pressure rating and OE performance comparison, it is a direct-fit style replacement for many Ford, Jeep, Honda, Toyota, Nissan, Mazda, BMW, Porsche, and other applications that use this cap specification.

Gates OE Type Radiator Cap 31527 is engineered to meet or exceed OEM specifications for function, form, and fit. It uses corrosion-resistant metal or high-quality plastic depending on application, helping maintain long service life and consistent sealing performance.

Key Features

• Standard radiator cap design with OE performance comparison
• 13 psi pressure rating for proper cooling system pressure control
• Filler neck inside diameter: 1.61 in. / 41 mm
• Filler neck outside diameter: 2.13 in. / 54 mm
• Filler neck depth: 0.75 in. / 19 mm
• Shell diameter: 2.33 in.
• Cap depth: 1.25 in.
• Coolant recovery system: optional system
• Manufactured to meet or exceed OEM specifications in function, form, and fit

Detailed Description

This Gates radiator cap is designed for vehicles that require a standard 13 psi cap with the listed filler neck dimensions. It helps maintain the correct pressure in the radiator, which supports stable coolant circulation and consistent system operation. The OE Type Radiator Cap line from Gates focuses on replacement parts that match original equipment requirements for everyday service and repair work.

Fits 1991-1993 Ford Explorer, N/A; Fits 1998 Ford Explorer, N/A; Fits 1975-1997 Ford E-150 Econoline, N/A; Fits 1975-1997 Ford E-250 Econoline, N/A; Fits 1975-1997 Ford E-350 Econoline, N/A; Fits 1975-1996 Ford F-150, N/A; Fits 1970-1997 Ford F-250, N/A; Fits 1970-1997 Ford F-350, N/A; Fits 1984-1995 Jeep Cherokee, N/A; Fits 1976-1989 Honda Accord, N/A; Fits 1971-1986 Toyota Land Cruiser, N/A; Fits 1980-1986 Nissan 720, N/A; Fits 1979-1985 Mazda RX-7, N/A; Fits 1985-1989 BMW 635CSi, N/A; Fits 1978-1984 Toyota Cressida, N/A; Fits 1983-1984 Porsche 944, N/A.

This part cross-references Standard Ignition (e.g., RC-12, RC-19) for the same application.

What It Helps Address

• Loss of radiator pressure from a worn or weak cap
• Coolant overflow caused by incorrect cap sealing
• Pressure instability in older cooling systems
• Fitment issues when replacing an OE-style 13 psi radiator cap
• Service replacement needs on vehicles such as Ford Bronco, Jeep Wrangler, and Honda Civic applications listed above

Installation Notes and Tips

Verify the filler neck inside diameter, outside diameter, and depth before installation. Confirm the system calls for a 13 psi cap and check whether the vehicle uses an optional coolant recovery system. Inspect the radiator neck and sealing surfaces for corrosion, damage, or debris before installing the cap.

For best results, replace the cap only after the cooling system has cooled completely. Confirm the application against the vehicle listing, especially on older Ford, Jeep, Toyota, and Porsche models where configuration notes may apply.

Quality Assurance

Gates manufactures this radiator cap to meet or exceed OEM specifications in function, form, and fit. The cap is built from corrosion-resistant heavy-gauge metal or high-quality plastic, depending on application, to support long service life and accurate pressure control. It also meets or exceeds environmental regulatory standards intended to reduce air pollution.