Gates 31523 Radiator Cap

OE Type 16 PSI Radiator Cap

The Gates OE Type Radiator Cap, part number 31523, is a standard vented cap built for accurate pressure control in cooling systems that use a 16 psi rating. It is a direct OE-style replacement for a wide range of Chrysler, Dodge, Jeep, GM, Ford, and select import applications, including Chrysler Town & Country, Dodge Grand Caravan, and Jeep Cherokee.

Constructed from corrosion-resistant heavy-gauge metal or high-quality plastic, depending on application, this radiator cap is made to deliver long service life and consistent sealing performance. Gates 31523 meets or exceeds OEM specifications for function, form, and fit.

Key Features

• Standard vented radiator cap with 16 psi pressure rating
• OE Performance comparison rating for factory-style operation
• Corrosion-resistant construction for durability in cooling system service
• Fits filler neck inside diameter of 1.61 in. (41 mm)
• Fits filler neck outside diameter of 2.13 in. (54 mm)
• Cap depth: 1.25 in.; shell diameter: 2.33 in.
• Compatible with optional coolant recovery systems

Product Details

Gates OE Type Radiator Cap 31523 is engineered for vehicles that require a 16 psi radiator cap and a standard vented design. The cap helps maintain proper cooling system pressure, which is critical for stable operating temperatures and reliable coolant circulation. Its OE-style dimensions and pressure range make it a practical replacement for service work on vehicles such as Dodge Caravan, Chevrolet Astro, Pontiac Grand Prix, and GMC Safari.

This part cross-references Dorman - HELP 46043 and Mopar 52079880AA for the same application.

What It Helps Address

• Loss of cooling system pressure from a worn or weak cap
• Coolant seepage at the radiator filler neck
• Pressure irregularities that can affect coolant boiling point
• Cap sealing issues caused by age, corrosion, or heat cycling
• Service replacement needs on OE-style 16 psi cooling systems

Installation Notes and Tips

Verify filler neck dimensions and pressure rating before installation. This cap is specified for a 1.61 in. inside diameter filler neck, 2.13 in. outside diameter filler neck, and 16 psi pressure rating. Inspect the radiator neck and sealing surfaces for damage, corrosion, or debris before installing the new cap. Confirm that the vehicle uses a standard vented cap and, where applicable, an optional coolant recovery system.

Quality Assurance

Gates manufactures this radiator cap to meet or exceed OEM specifications in function, form, and fit. The corrosion-resistant construction and OE-style pressure control support dependable cooling system service across the listed applications, including Chrysler Town & Country, Dodge Grand Caravan, and Jeep Cherokee.