Champion 431 Spark Plug

Reliable Ignition Performance for Select Vehicles

The Champion Copper Plus 431 spark plug is engineered to deliver consistent ignition performance for a range of vehicles including Chevrolet Camaro, Ford Thunderbird, and Lincoln Continental. Designed with durable nickel electrodes and a resistor to reduce electrical noise, this spark plug supports efficient combustion and engine operation.

• Ground electrode core material: Nickel for durability
• Center electrode tip material: Nickel
• Pre-gap size: 0.035 inches (0.90 mm)
• Single ground electrode design
• Flat seat type with 0.75 inch reach
• Thread diameter: 14 mm (0.551 inches)
• Non-removable nut electrical terminal
• Resistor type spark plug to minimize radio frequency interference
• Hex size: 15.88 mm (0.625 inches) for installation
• Manufacturer heat range: 14

About the Champion Copper Plus Spark Plug Line

The Copper Plus line from Champion is designed to provide reliable ignition with copper core technology, which enhances heat dissipation and improves spark efficiency. The 431 spark plug in this line features nickel electrodes that balance durability and performance, making it suitable for a variety of secondary ignition applications in vehicles such as the Mercury Cougar and Oldsmobile Achieva.

Technical Details and Compatibility

This spark plug features a flat seat and a reach of 0.75 inches, ensuring proper fitment in compatible engines. The thread diameter of 14 mm and a hex size of 15.88 mm allow for straightforward installation using standard tools. The pre-gap size of 0.035 inches (0.90 mm) is factory set to optimize ignition timing and combustion efficiency. The resistor design helps reduce electromagnetic interference, which can affect vehicle electronics.

Applications and Common Issues Addressed

• Restores proper ignition in Chevrolet Camaro and Ford Thunderbird engines
• Helps resolve misfires and rough idling in Lincoln Continental and Mercury Cougar
• Improves fuel efficiency and engine responsiveness in Oldsmobile Achieva
• Reduces radio frequency interference affecting vehicle electronics
• Supports consistent spark delivery for smooth engine operation

Installation Notes and Tips

• Verify compatibility with your vehicle’s make and model before installation
• Use a torque wrench to tighten the spark plug to manufacturer specifications
• Check and adjust the spark plug gap if necessary, though the pre-gap is factory set
• Inspect the ignition system components for wear during replacement
• Ensure the electrical terminal is securely connected for optimal performance

Quality Assurance and Warranty

The Champion Copper Plus 431 spark plug is manufactured to meet industry standards for ignition components. It includes a resistor to reduce electrical noise and is constructed with nickel electrodes for durability. While specific warranty details may vary, Champion products typically come with a limited warranty against manufacturing defects. Refer to the product packaging or manufacturer documentation for exact warranty terms.