Gates 31738 Fuel Tank Cap

OE Equivalent Fuel Cap for Reliable Sealing

The Gates 31738 OE Equivalent Fuel Cap is built for direct replacement use on select fuel tank applications that require an OE-style cap with emission control venting. It is engineered to meet or exceed OEM specifications and uses rugged, heavy-duty construction for dependable sealing performance.

Compatible With 1971 Chevrolet Blazer, 1971 Chevrolet C10 Suburban, 1971 Chevrolet K10 Suburban, 1971 GMC Jimmy, and 1970 Ford F-250 and F-350 with California emission systems, this fuel tank cap supports the original filler neck design and helps maintain proper tank closure. The Gates 31738 is also cross-referenced to Four Seasons 46146 for the same application.

Key Features

• OE Equivalent Fuel Cap for direct replacement service
• Meets or exceeds OEM specifications
• Heavy-duty construction for everyday fuel system use
• Fits shallow cam filler necks
• Emission control venting
• Non-lockable design
• 1.5 thread diameter, 2.88 shell diameter, 1.2 depth
• OE performance rating

Product Details

Gates OE Equivalent Fuel Cap line is focused on replacement parts that match original equipment requirements for fit and function. Part number 31738 is designed for shallow cam filler necks and is listed for vented, non-vented, and vented anti-surge applications within the OE-equivalent fuel cap family. For buyers searching for a fuel cap for a 1971 Chevrolet Blazer, 1971 GMC Jimmy, or a 1970 Ford F-250 fuel tank cap with California emission system coverage, this part number provides a direct OE-style option.

Common Issues This Part Can Address

• Loose or worn fuel cap sealing surfaces
• Emission control cap replacement needs
• Fuel tank closure problems on shallow cam filler necks
• Incorrect cap fitment from mismatched thread or shell dimensions
• Replacement needs for aging OE-style fuel caps

Installation Notes and Tips

Verify filler neck style before installation, especially shallow cam design and thread diameter. Confirm the vehicle uses an emission control fuel cap application and match the cap to the original neck depth and shell size. For best results, inspect the filler neck sealing area for wear, corrosion, or damage before installing the Gates 31738.

Quality Assurance

This OE Equivalent Fuel Cap is built to Gates specifications and is described as meeting or exceeding OEM requirements. The Gates 31738 is intended as an OE-style replacement for applications that call for emission control fuel cap performance and original-equipment fit characteristics.