Autolite 86 Spark Plug

Reliable Ignition with Autolite Copper Resistor Spark Plug 86

The Autolite Copper Resistor Spark Plug part number 86 is engineered to provide consistent ignition performance for a range of classic and modern vehicles. Designed with durable materials and precise specifications, this spark plug supports efficient combustion and smooth engine operation.

• Resistance: 4000 ohms for effective electrical noise suppression
• Center electrode core made of copper with a nickel tip for optimal conductivity and durability
• Tapered ground electrode tip crafted from nickel for reliable spark delivery
• Single ground electrode design with a flat seat for secure fitment
• Ceramic mid-projection insulator for enhanced heat dissipation
• Pre-gap size of 0.035 inches (0.90 mm) for precise spark gap
• Stud type electrical terminal and 13/16" (21 mm) hex size for easy installation
• Thread diameter of 14.0 mm and reach of 0.374 inches (9.5 mm) to match specific engine requirements

About the Autolite Copper Resistor Spark Plug Line

The Copper Resistor Spark Plug line from Autolite combines copper core technology with resistor features to reduce electromagnetic interference while maintaining strong ignition performance. This line is designed to meet the demands of secondary ignition systems in various vehicles, ensuring compatibility and reliable operation. The resistor built into the spark plug helps minimize radio frequency interference, making it suitable for vehicles equipped with sensitive electronic components.

Detailed Product Description

The Autolite Copper Resistor Spark Plug 86 features a copper core center electrode that enhances thermal conductivity and electrical performance. The nickel tip on both the center and tapered ground electrode provides durability and resistance to wear. The single ground electrode design with a flat seat ensures a secure and consistent fit in the combustion chamber. The ceramic mid-projection insulator improves heat dissipation and helps maintain stable operating temperatures. With a pre-gap size of 0.035 inches (0.90 mm), this spark plug is ready for optimal spark delivery without additional adjustment.

Compatible Vehicles and Applications

This spark plug is compatible with a wide range of vehicles including Buick, Cadillac, Chevrolet, Chrysler, Dodge, Oldsmobile, and Pontiac models. It fits popular models such as the Camaro, Caprice, Corvette, Firebird, GTO, Impala, Malibu, Monte Carlo, and many others. The Autolite Copper Resistor Spark Plug 86 is suitable for engines requiring a 14.0 mm thread diameter and 0.374 inch reach, commonly found in classic and performance vehicles from these manufacturers.

• Helps resolve misfires caused by worn or damaged spark plugs
• Reduces radio frequency interference in vehicles with sensitive electronics
• Improves cold start performance and throttle response
• Maintains consistent spark gap for efficient combustion
• Prevents fouling and electrode wear in high-heat environments

Installation Notes and Tips

Before installation, verify the spark plug gap matches the vehicle manufacturer’s specifications. The Autolite Copper Resistor Spark Plug 86 comes pre-gapped at 0.035 inches (0.90 mm), but adjustment may be necessary for specific engines. Use a torque wrench to tighten the spark plug to the recommended torque setting to avoid damage to the threads or seat. The 13/16" (21 mm) hex size allows for standard spark plug socket compatibility. Ensure the engine is cool before removing old plugs to prevent thread damage.

Quality Assurance and Warranty

Autolite spark plugs are manufactured to meet industry standards for durability and performance. The Copper Resistor Spark Plug line undergoes rigorous testing to ensure consistent resistance and reliable ignition. While specific warranty details may vary, Autolite products typically come with a limited warranty against manufacturing defects. Refer to the product packaging or manufacturer’s website for complete warranty information.