Gates 31743 Fuel Tank Cap

OE Equivalent Fuel Cap for Classic Trucks

The Gates 31743 OE Equivalent Fuel Cap is built for dependable sealing on older fuel systems that use a deep cam filler neck. It meets or exceeds OEM specifications and is designed for shallow and deep cam applications, including vented, non-vented, and vented anti-surge styles.

• OE Equivalent Fuel Cap from Gates
• Rugged, heavy-duty construction
• Deep cam design
• Emission control venting
• Thread diameter: 1.38 in.
• Shell diameter: 3.22 in.
• Depth: 1.88 in.
• Non-lockable design

Product Details

Gates OE Equivalent Fuel Cap 31743 is an OE Performance replacement for vehicles that need a precise fuel tank cap fit and consistent sealing. This fuel cap is listed for a wide range of classic Dodge, Chevrolet, GMC, Chrysler, and Plymouth applications, including 1972-1981 Dodge Dart, 1974-1980 Dodge Ramcharger, and 1975-1978 Chevrolet C10 and K10 models. It is also cross-referenced to Monroe Shocks & Struts 371616 for the same application.

As part of the Gates OE Equivalent Fuel Cap line, this part focuses on factory-style fit and function for emission control systems. The deep cam profile and emission-control venting help match the original filler neck design on many older trucks and SUVs, including Chevrolet Blazer and GMC Jimmy applications.

Common Problems This Part Can Address

• Loose or worn fuel cap sealing on deep cam filler necks
• Fuel vapor leakage from a deteriorated cap seal
• Check-engine concerns related to emission control sealing
• Difficulty matching an OE-style replacement cap for classic truck fuel systems
• Fitment issues on shallow or deep cam filler neck designs

Installation Notes and Tips

Verify filler neck style before ordering, especially on Dodge D100, D150, D200, D300, W150, W200, and W300 models with notes for cab tank and threaded filler neck configurations. Confirm the cap matches the vehicle’s venting and emission-control requirements, and compare the thread diameter, shell diameter, and depth to the original cap before installation. For best results, inspect the filler neck sealing surface for rust, damage, or debris.

Quality Assurance

Gates OE Equivalent Fuel Caps are engineered to meet or exceed OEM specifications and use heavy-duty construction for consistent OE-style performance. Part number 31743 is built to the same application standard expected for factory replacement fuel caps.