Gates 31836D Fuel Tank Cap

Diesel Fuel Cap for Ram and Jeep Applications

The Gates 31836D Diesel Only Locking Fuel Cap is a heavy-duty fuel tank cap built for industrial and diesel engine use. It combines a lockable design with pressure-vacuum venting to help maintain proper tank function while keeping diesel fuel protected.

Built for select Ram, Dodge Ram, Jeep, and Mercedes-Benz diesel applications, this green fuel cap is a direct-fit service part for vehicles that use the specified quick-on style and thread dimensions. The Gates 31836D is a practical replacement when the original cap is worn, damaged, or no longer sealing correctly.

Key Features

• Diesel only locking fuel cap for diesel engine applications
• Lockable design for added fuel tank security
• Pressure-vacuum venting to support tank breathing
• Quick-On cam type for the listed applications
• Green cap color for easy diesel identification
• Heavy-duty construction for industrial and diesel use
• Part number: 31836D

Product Details

The Gates Diesel Only Locking Fuel Cap line is built around durable service parts for diesel fuel systems, and the 31836D follows that approach with a secure, vented cap design. It features a 1.78 thread diameter, 2.61 depth, and 2.91 shell diameter, along with pressure-vacuum venting for proper fuel tank operation. This makes it a strong replacement choice for Ram 2500, Ram 3500, and Ram 1500 diesel models, as well as select Dodge Ram, Jeep Grand Cherokee, Jeep Liberty, and Mercedes-Benz diesel vehicles.

This part cross-references 10508D and 35071D for the same application. If you are searching for a diesel fuel tank cap for a 2011-2024 Ram 2500 or a 2007-2009 Jeep Grand Cherokee, Gates 31836D is the listed fitment reference to verify against your original cap.

Common Problems This Part Can Address

• Broken or missing locking fuel cap
• Fuel cap that no longer seals properly
• Diesel tank contamination from an unsecured cap
• Vent-related fuel tank pressure or vacuum issues
• Replacement needs for worn quick-on fuel cap hardware

Installation Notes and Tips

Confirm the original cap style, thread diameter, and venting setup before installation. This Gates 31836D fuel cap uses a quick-on cam type and is listed for diesel-only applications, so it should be matched to the vehicle’s fuel system requirements. For Ram 2500 and Ram 3500 diesel trucks, as well as Dodge Ram and Jeep diesel models, compare the old cap to the replacement to ensure the locking function and fit are correct.

Quality Assurance

Gates manufactures fuel system service parts for industrial and diesel engine applications, and this locking fuel cap is part of that heavy-duty product line. Part number 31836D is listed with confirmed vehicle fitment and interchange references for application matching.