Gates 31329 Radiator Cap

OE Type Radiator Cap for Closed Cooling Systems

The Gates 31329 OE Type Radiator Cap is built for closed coolant bottle applications that require accurate pressure control and a threaded cap design. It is a direct-fit cooling system service part for select Ram ProMaster, Fiat 500, and Volvo models, including Volvo XC90, Volvo S60, and Volvo S80 applications.

Gates OE Type Radiator Cap 31329 is engineered to meet or exceed OEM specifications for function, form, and fit, with corrosion-resistant construction for long service life. This 22 psi radiator cap is a practical replacement for vehicles that need stable cooling system pressure and dependable sealing at the filler neck.

Key Features

• OE Type Radiator Cap for closed coolant recovery systems
• Pressure rating: 22 psi, with SAE pressure range of 18-22 psi
• Threaded coolant bottle cap design
• Corrosion-resistant metal or high-quality plastic construction, depending on application
• OE performance rating for factory-style fit and operation
• Filler neck dimensions: 1.31 in inside diameter, 1.78 in outside diameter
• Cap depth: .31 in; shell diameter: 2.98 in

Detailed Description

The Gates 31329 radiator cap is made for closed-system cooling setups that rely on precise pressure regulation to maintain proper coolant performance. Its threaded coolant bottle cap design and OE-style dimensions help it seat correctly on the filler neck, while the 22 psi rating supports the pressure requirements listed for the covered applications. This part number is commonly searched as Gates 31329 radiator cap and 31329 coolant bottle cap for Ram ProMaster and Volvo cooling system service.

Use this cap when replacing a worn, leaking, or pressure-weakening radiator cap on vehicles such as Ram ProMaster 1500, Ram ProMaster 2500, Ram ProMaster 3500, Fiat 500, Fiat 500L, Volvo XC90, Volvo XC60, Volvo S60, Volvo S80, and other listed applications. This part cross-references Mopar 68097622AA for the same application.

What It Helps Address

• Coolant loss caused by a cap that no longer seals properly
• Pressure irregularities in a closed cooling system
• Overheating concerns related to weak radiator cap pressure retention
• Coolant bottle cap wear, corrosion, or damaged threads
• Factory-style replacement needs for OE-type cooling system service

Installation Notes and Tips

Verify the filler neck inside diameter, outside diameter, and depth before installation to confirm proper seating. This cap is specified for closed coolant recovery systems and a 22 psi pressure rating, so match the vehicle’s cooling system requirements before service. Inspect the sealing surfaces and neck threads for damage, and replace the cap if the old unit shows corrosion, cracking, or loss of pressure control.

Quality Assurance

Gates manufactures this OE Type Radiator Cap to meet or exceed OEM specifications in function, form, and fit. The corrosion-resistant construction and pressure-controlled design support consistent cooling system service on the listed Ram, Fiat, and Volvo applications.