Champion 9402 Spark Plug

Reliable Ignition with Champion Iridium Spark Plug 9402

The Champion Iridium 9402 spark plug is engineered to deliver consistent ignition performance for a wide range of vehicles including Buick, Chevrolet, Ford, and Mazda models. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and engine reliability.

• Iridium center electrode tip for enhanced durability and ignition
• Platinum ground electrode core material with J gap design
• Non-removable nut electrical terminal type for secure connection
• Pre-gap size of 0.055 inches (1.40 mm) for optimal spark
• Tapered seat type with a thread diameter of 14 mm and reach of 0.689 inches
• Resistor type spark plug to reduce electrical noise interference
• Hex size of 0.625 inches (15.88 mm) for standard installation tools
• Manufacturer heat range of 14 suitable for various engine conditions

Champion Iridium Product Line Overview

The Champion Iridium line focuses on delivering spark plugs with iridium-tipped center electrodes, which provide improved wear resistance and longer service life compared to conventional plugs. The 9402 model incorporates these features along with a platinum ground electrode core, combining materials to optimize ignition reliability and combustion efficiency for secondary ignition systems.

Technical Details and Compatibility

The Champion Iridium 9402 spark plug features a single ground electrode with a J gap design, which helps maintain consistent spark performance. The non-removable nut terminal ensures a stable electrical connection, while the tapered seat type and precise thread dimensions (14 mm diameter, 0.689 inch reach) allow for proper fitment in compatible engines. This spark plug is resistor type, reducing radio frequency interference that can affect vehicle electronics.

Compatible Vehicles and Applications

• Buick models such as Century, Skylark, and Regal
• Chevrolet vehicles including Avalanche 2500, Silverado 2500 HD, and Monte Carlo
• Ford trucks and cars like Bronco II, Mustang, and Ranger
• Mazda and Mercury models including B4000 and Cougar
• Other makes such as Cadillac, GMC, Isuzu, Lincoln, Oldsmobile, Pontiac, and more

Common Issues Addressed by Champion Iridium 9402

• Misfiring or inconsistent engine ignition
• Reduced fuel efficiency due to poor spark quality
• Difficulty starting the engine in cold or damp conditions
• Engine hesitation or rough idling
• Electrical interference affecting onboard electronics

Installation Notes and Tips

Before installation, verify the spark plug gap is set to the specified pre-gap size of 0.055 inches (1.40 mm). Use a torque wrench to tighten the plug to manufacturer specifications to avoid damage to the tapered seat. The 15.88 mm hex size allows for standard spark plug sockets. Ensure the ignition system is off and the engine is cool before replacing spark plugs.

Quality Assurance and Warranty

Champion spark plugs are manufactured to meet OEM standards for fit, form, and function. The Iridium 9402 model undergoes rigorous quality control to ensure durability and performance. While specific warranty details may vary, Champion typically offers coverage against manufacturing defects to support product reliability.