Gas Fuel Caps

Seal Your Tank: Vintage Vented, Non-Vented & Locking Gas Caps

Is your garage smelling like gasoline, or does your engine mysteriously die after 20 minutes of driving, only to restart once you open the filler cap? You likely have the wrong gas cap. The fuel cap is a critical component of your fuel system, maintaining the correct tank pressure and preventing dangerous fumes from escaping.

At Old Car Parts NW, we stock authentic NORS (New Old Replacement Stock) gas caps from trusted vintage brands like Stant and Wayne.

Vented vs. Non-Vented: What Do You Need?

Using the wrong cap is a common mistake in restoration.

• Vented Caps: Essential for most pre-1970 vehicles. If your fuel tank does not have a separate breather tube, the cap must "breathe" to replace consumed fuel with air. If you use a non-vented cap here, the fuel pump will create a vacuum that starves the engine.

• Non-Vented Caps: Required for vehicles equipped with evaporative emissions systems (typically late 1960s and newer) that use a charcoal canister or separate vent line.

• Locking Caps: Protect your fuel and prevent vandalism with our vintage chrome locking caps—a must-have accessory for street parking.

Inventory Highlights:

• Standard Chrome: OEM-style caps for a factory look.

• Anti-Surge: Designed to prevent fuel sloshing out during cornering.

• Fitment: Shallow and Deep Cam styles for Ford, Chevy, Mopar, and AMC.