Gates 31526 Radiator Cap

OE Type Radiator Cap for Classic Cooling Systems

The Gates 31526 OE Type Radiator Cap is built for older cooling systems that call for a 7 psi pressure rating and a standard cap design. It is a direct-fit style radiator cap for select classic Toyota Corolla, Ford F-100, Chevrolet Corvette, and other vintage applications where accurate pressure control matters.

Gates OE Type Radiator Cap 31526 is engineered to meet or exceed OEM specifications for function, form, and fit. The cap uses corrosion-resistant construction and is designed for long service life while maintaining consistent system pressure in the radiator and recovery setup.

Key Features

• Part number: 31526
• OE Type Radiator Cap with standard cap design
• 7 psi pressure rating; SAE pressure range 6-8 psi
• Corrosion-resistant metal or high-quality plastic construction, depending on application
• Cap depth: 1.25 in
• 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
• Coolant recovery system: optional system
• OE performance comparison rating

Product Details

This Gates radiator cap is designed for vehicles that require a low-pressure, OE-style sealing and venting setup. It is a practical choice for maintaining proper coolant pressure in older systems, including applications such as 1957-1965 Ford F-100, 1957-1965 Ford F-250, 1957-1965 Ford F-350, 1957-1962 Chevrolet Corvette, and 1969-1974 Toyota Corolla. The Gates 31526 also cross-references Wix 33005 for the same application.

By matching the specified filler neck dimensions and pressure rating, this cap helps preserve the cooling system’s original operating characteristics. Gates manufactures this OE Type Radiator Cap to meet or exceed OEM specifications in function, form, and fit, making it a suitable replacement for classic passenger cars and light trucks that use a 7 psi cap.

What This Radiator Cap Helps Address

• Loss of radiator pressure from a worn or weak cap
• Coolant overflow caused by inconsistent cap sealing
• Cooling system pressure mismatch on vintage OE-style applications
• Fitment issues from incorrect filler neck dimensions
• Degraded cap materials from corrosion or age

Installation Notes and Tips

Verify the radiator filler neck dimensions, depth, and pressure rating before installation. This cap is listed for N/A position applications and should be matched to the vehicle’s original cooling system specifications. Confirm whether your system uses an optional coolant recovery setup before service. For fitment examples, this part fits 1957-1965 Ford F-100, N/A; fits 1957-1962 Chevrolet Corvette, N/A; and fits 1969-1974 Toyota Corolla, N/A.

Quality Assurance

Gates builds this radiator pressure cap to meet or exceed OEM specifications and environmental regulatory standards. The construction is intended to provide accurate pressure control and long service life in classic cooling systems.