Gates 31629 Fuel Tank Cap

OE Equivalent Fuel Cap for Jeep and Volkswagen

The Gates 31629 OE Equivalent Fuel Cap is built for direct replacement on select Jeep and Volkswagen applications. It is made with rugged, heavy-duty construction and meets or exceeds OEM specifications for a dependable seal and proper fuel system operation.

Compatible with shallow cam filler necks, this fuel tank cap is also engineered for vented, non-vented, and vented anti-surge systems. The Gates OE Equivalent Fuel Cap line focuses on OE-style fit and function for vehicles that need a precise replacement cap.

• OE Equivalent Fuel Cap design for OE-style replacement
• Heavy-duty construction for everyday fuel system use
• Fits shallow cam filler necks
• Works with vented, non-vented, and vented anti-surge configurations
• Emission control venting specification
• OE Performance comparison rating
• Thread diameter: 1.38 in; shell diameter: 3.25 in; depth: 1.42 in

Product Details and Fitment

This Gates 31629 fuel tank cap is a direct-fit replacement for older Jeep and Volkswagen models, including 1977-1988 Jeep CJ5, CJ7, Cherokee, Wagoneer, J10, J20, Scrambler, Grand Wagoneer, and Wrangler applications, plus 1990-1993 Volkswagen Cabriolet. It is a practical choice when replacing a worn or missing cap on a vehicle that uses a shallow cam filler neck. The Gates 31629 is also cross-referenced with Wix 46172 for the same application.

What This Fuel Cap Helps Solve

• Loose or damaged fuel cap sealing surfaces
• Fuel vapor loss caused by a worn cap
• Check engine or emission-control concerns related to cap sealing
• Fitment issues on shallow cam filler necks
• Replacement needs for aging Jeep and Volkswagen fuel tank caps

Installation Notes and Quality Assurance

Verify filler neck style, thread diameter, and cap depth before installation. Confirm the vehicle uses a shallow cam neck and the correct venting style for the fuel system. A proper seal depends on clean mating surfaces and correct cap engagement. Gates designs the OE Equivalent Fuel Cap line to meet or exceed OEM specifications for replacement use.

Part number 31629 is a straightforward OE-style fuel cap replacement for select Jeep CJ5, CJ7, Cherokee, Wagoneer, J10, J20, Scrambler, Grand Wagoneer, Wrangler, and Volkswagen Cabriolet models.