Gates 31291 Engine Oil Filler Cap

Gates Oil Filler Cap 31291 Overview

The Gates 31291 oil filler cap is an OE Exact replacement built for a secure seal and reliable fit on select GM and Suzuki applications. It uses impact-resistant plastic with a rubber seal to help maintain proper crankcase closure on vehicles such as the Chevrolet Cruze, Sonic, Trax, and Buick Encore.

Gates Oil Filler Cap products are built with durable construction for long service life, and this black twist-lock cap is sized to match the original neck dimensions for direct replacement service.

Key Features

• OE Exact oil filler cap replacement
• Twist-lock cam type for secure engagement
• Plastic and rubber construction
• Black finish
• Gasket or seal included
• Dimensions: 2.32 in width, 2.24 in shell diameter, 1.16 in height
• Neck depth: 1.25 in; neck diameter: 1.79 in

Detailed Description

Gates part number 31291 is an engine oil filler cap designed for direct replacement on a wide range of vehicles, including the Chevrolet Cruze, Chevrolet Sonic, Chevrolet Trax, Buick Encore, and Chevrolet Volt. It is also listed for applications such as the Chevrolet Aveo, Saturn Vue, Cadillac CTS, and Suzuki Forenza. This part cross-references FEL-PRO 36083 for the same application.

The cap’s plastic body and rubber sealing surface are intended to provide a tight closure at the oil fill opening, helping maintain the engine’s sealed condition during normal operation. The twist-lock design supports straightforward installation on the correct filler neck profile.

What It Helps Address

• Loose or missing oil filler cap
• Oil vapor escaping from the filler opening
• Oil splash or seepage around the fill neck
• Damaged seal at the oil fill point
• Incorrect cap fit on OE-style filler necks

Installation Notes and Tips

Verify the filler neck diameter, shell diameter, and twist-lock style before installation. Confirm vehicle application by year, make, and model, especially on Chevrolet Cruze, Sonic, Trax, and Buick Encore listings. Inspect the sealing surface and neck area for debris or damage before seating the cap.

Quality Assurance

Gates oil caps are manufactured with impact-resistant plastic or heavy-gauge metal construction to support long service life. Part number 31291 is listed as an OE Exact replacement for the specified applications.