Gates 31842 Fuel Tank Cap

Gates 31842 Regular Locking Fuel Cap

The Gates 31842 locking fuel cap is a direct replacement for vehicles that use a regular fuel cap with a quick-on cam design. It is built to meet OEM specifications and emission requirements while helping maintain proper tank pressure control.

Key Features

• Lockable regular fuel cap for added fuel system security
• Two-way pressure relief and vacuum relief valve helps the fuel tank breathe
• Vacuum-only venting configuration
• Quick-On cam type for straightforward cap engagement
• Thread diameter: 1.56 in.; shell diameter: 2.68 in.; depth: 2.53 in.
• Built to meet OEM specifications and Federal and State emission requirements

Product Details

This Gates Regular Locking Fuel Cap, part number 31842, is intended for vehicles that require a standard locking gas cap with vacuum-only venting. The pressure relief and vacuum relief design helps control fuel vapor escape while allowing the tank to breathe as operating conditions change. For Ford, Mazda, Lincoln, and Mercury applications, Gates 31842 supports a proper seal and secure closure where the original cap uses a quick-on style.

Gates’ Regular Locking Fuel Cap line focuses on OE-style fit and function for everyday fuel system service. This part cross-references Four Seasons 10510 for the same application.

What It Helps Address

• Loose, damaged, or missing fuel cap
• Fuel vapor odor from a poor cap seal
• Check engine light concerns related to evaporative emissions sealing
• Difficulty maintaining proper tank pressure or vacuum balance
• Fuel theft concerns on lockable-cap applications

Installation Notes and Tips

Verify the filler neck style, thread diameter, and cap depth before installation. This cap uses a quick-on cam type and is listed for vacuum-only venting applications, so match the original cap design and vehicle notes closely. Confirm fitment for Ford E-150, F-150, Ranger, Mazda CX-9, and other listed applications before purchase. Fits 2004-2014 Ford E-150, N/A; Fits 2005-2008 Ford F-150, N/A; Fits 2010-2014 Mazda CX-9, N/A.

Quality Assurance

Gates states this fuel tank cap meets OEM specifications and Federal and State emission requirements, with a two-way pressure relief and vacuum relief valve for controlled tank breathing and vapor retention.