Motorad MGC853 Fuel Tank Cap

Fuel Tank Cap for Corvette

The Motorad Standard MGC853 fuel tank cap is built with metal construction and vented, anti-surge fuel cap venting for a secure seal on select Chevrolet Corvette applications. It is designed to meet OEM-quality material and safety standards while supporting emissions compliance and fuel vapor control.

Fits 1963-1969 Chevrolet Corvette, N/A. Fits 1970-1974 Chevrolet Corvette, N/A, Black Cap; with Vented Fuel Cap; Standard.

Key Features

• Metal fuel tank cap with silver finish
• Vented, anti-surge venting for controlled fuel tank pressure
• Pressure and vacuum relief valve design to help reduce fuel evaporation
• Built to pass state and federal emissions requirements
• Neck diameter: 3.250 in; shell diameter: 3.500 in; depth: 1.25 in
• Non-locking design with no tether included

Detailed Description

Motorad Standard MGC853 is a vented fuel tank cap engineered for select Chevrolet Corvette models from 1963-1974. The metal body and OEM-quality materials support a dependable seal at the filler neck, while the pressure and vacuum relief valves help manage tank breathing and reduce evaporative loss. For Corvette owners searching for a 1963-1969 Chevrolet Corvette fuel tank cap or a 1970-1974 Chevrolet Corvette vented fuel cap, this part number provides a direct-fit service replacement for the listed applications. This part cross-references AMS Automotive 6853 for the same application.

Common Issues This Part Helps Address

• Fuel vapor escaping from a worn or leaking cap
• Evaporative emissions faults related to cap sealing
• Pressure buildup or vacuum-related tank venting concerns
• Loose, damaged, or corroded original fuel cap hardware
• Improper fit at the fuel filler neck on listed Corvette applications

Installation Notes and Tips

Verify the filler neck diameter measures 3.250 in before installation. Confirm the cap style matches the vehicle’s original vented fuel cap requirement, especially on 1970-1974 Chevrolet Corvette models with black cap and standard vented fuel cap notes. Inspect the neck sealing surface for rust, dents, or debris before installing MGC853.

Quality Assurance

Motorad manufactures this Standard fuel tank cap using OEM-quality materials and safety standards as an OE supplier. The design is intended to meet state and federal emissions requirements and to support controlled fuel vapor management through dedicated pressure and vacuum relief valves.