Gates 31118 Engine Oil Filler Cap

Gates Oil Filler Cap 31118 for OE-Exact Fitment

The Gates 31118 oil filler cap is an OE Exact replacement built for direct service on a wide range of Chrysler, Dodge, Jeep, Ram, and Mitsubishi applications. It uses a screw-on design with a black plastic body and an included gasket or seal for a secure closure at the filler neck.

Key Features

• OE Exact replacement for direct-fit service
• Black plastic construction for everyday engine-bay use
• Screw-on cam type for secure engagement
• Gasket or seal included
• Shell diameter: 2.72 in; height: 1.36 in
• Neck diameter: 1.31 in; neck depth: 1.3 in

Product Details

Gates Oil Filler Cap 31118 is part of the Gates Oil Filler Cap line, which focuses on replacement caps made from impact-resistant plastic or heavy-gauge metal for long service life. This cap is a black plastic, screw-on oil filler cap with OE Exact comparison rating, making it a direct replacement for many vehicles that use a threaded filler neck. It cross-references Dorman - HELP 80990 for the same application.

Compatible With Chrysler 300, Dodge Charger, Dodge Challenger, Jeep Grand Cherokee, Ram 1500, and Mitsubishi Outlander models across the listed years, this cap is used on a broad range of engines that require a threaded oil filler cap. The Gates 31118 part number is also commonly searched as a replacement oil cap for Chrysler 300 and Dodge Charger service work.

Common Issues This Part Addresses

• Missing or damaged oil filler cap
• Loose cap that no longer seals properly
• Oil vapor escape from a worn gasket or seal
• Contamination entering the oil fill opening
• Service replacement for cracked or stripped plastic caps

Installation Notes and Tips

Verify the filler neck style, neck diameter, and cap depth before installation. This is a screw-on oil filler cap, so it should thread on smoothly without forcing. Confirm the OE Exact dimensions match the original cap on the vehicle, especially on applications such as Dodge Durango, Jeep Wrangler, and Mitsubishi Outlander Sport.

Quality Assurance

Gates builds this oil filler cap with impact-resistant plastic construction and an included gasket or seal to support a secure fit and long service life. The OE Exact rating indicates direct replacement sizing and form for the listed applications.