Gates 31109 Engine Oil Filler Cap

Gates Oil Filler Cap 31109

The Gates 31109 oil filler cap is an OE Exact replacement built for a secure, threaded seal on a wide range of engines. With a black plastic-and-rubber construction and included gasket/seal, it is made to restore proper closure at the oil fill opening on applications such as Ford F-150, Honda Civic, and Nissan 280ZX.

Key Features

• OE Exact replacement for direct-fit service
• Black plastic and rubber construction for everyday engine-bay use
• Screw-on cam type for threaded filler neck applications
• Gasket or seal included for a tighter closure
• Approximate shell diameter/width: 2.43 in.
• Approximate height: 1.27 in.
• Neck diameter and depth: 1.25 in.

Product Details

Gates Oil Filler Cap 31109 is part of the Gates Oil Filler Cap line, which focuses on replacement caps built from impact-resistant plastic or heavy-gauge metal for long service life. This cap is specified as an OE Exact match and uses a screw-on design to help maintain a proper seal at the oil fill neck. It cross-references Dorman - HELP 90005 for the same application.

Compatible With select Ford, Honda, Hyundai, Kia, Mazda, Nissan, Suzuki, Acura, Lincoln, Mercury, and other applications listed in the fitment data, including 2007-2014 Ford Mustang, 1985-2008 Ford F-150, and 1986-2002 Honda Civic. The Gates 31109 is a practical replacement when the original oil cap is cracked, missing, loose, or no longer sealing correctly.

Common Uses

• Restores a missing or damaged oil filler cap
• Helps correct oil seepage around the filler opening
• Replaces a cap that no longer threads on securely
• Addresses a worn or flattened seal at the oil fill neck
• Supports proper engine-oil containment during routine service

Installation Notes and Tips

Verify the filler neck diameter, thread style, and cap height before installation. This part is listed for screw-on, threaded filler neck applications, including some Ford trucks and vans that require a threaded oil filler cap. Compare the old cap to the new cap and confirm the OE Exact match before use.

Quality Assurance

Gates builds this oil filler cap with impact-resistant plastic or heavy-gauge metal construction, depending on application, to support long service life. The included gasket/seal and OE Exact rating help provide a direct replacement standard for maintenance and repair work.