Autolite AP86 Spark Plug

Autolite AP86 Platinum Spark Plug Overview

The Autolite AP86 Platinum Spark Plug is engineered for reliable ignition performance in a range of classic and modern vehicles. Designed with durable platinum electrodes and a tapered nickel ground electrode, this spark plug supports efficient combustion and consistent engine operation.

• Platinum center electrode tip and core for enhanced durability
• Tapered nickel ground electrode tip for precise spark delivery
• 4000 ohm resistor to reduce electrical interference
• Mid projection ceramic insulator for optimal heat dissipation
• Flat seat type with 14.0 mm thread diameter and 0.374 inch reach
• Compatible with stud-type electrical terminals
• Pre-gapped at 0.035 inches for easy installation

Detailed Features of the Autolite Platinum Spark Plug AP86

The AP86 spark plug from Autolite’s Platinum Spark Plug line features a platinum center electrode tip and core, which provides longer service life and stable performance under various driving conditions. The tapered ground electrode, made from nickel, ensures a consistent spark while minimizing electrode wear. This spark plug includes a 4000 ohm resistor to suppress radio frequency interference, protecting sensitive electronic components in vehicles. The ceramic insulator with mid projection design helps maintain proper heat range and prevents fouling. With a flat seat and a 14.0 mm thread diameter, the AP86 is designed for secure fitment and reliable sealing.

Compatible Vehicles and Applications

The Autolite AP86 spark plug is compatible with a wide range of vehicles from Buick, Cadillac, Chevrolet, Chrysler, Dodge, Oldsmobile, and Pontiac. It fits models such as the Chevrolet Camaro, Corvette, Impala, and Malibu, as well as the Pontiac Firebird, Grand Prix, and GTO. Other compatible vehicles include the Buick LeMans, Riviera, and Skylark, along with Chrysler’s Town & Country and Dodge Charger. This spark plug is suitable for both classic and contemporary engines requiring a platinum spark plug with these specifications.

Common Issues Addressed by the AP86 Spark Plug

• Engine misfires due to worn or fouled spark plugs
• Reduced fuel efficiency from inconsistent ignition
• Difficulty starting engines in cold or damp conditions
• Radio frequency interference affecting vehicle electronics
• Premature electrode wear in high-performance or high-mileage engines

Installation Notes and Tips

Before installation, verify the spark plug gap is set to 0.035 inches as specified. Use a torque wrench to tighten the spark plug to the manufacturer’s recommended torque to avoid damage to the threads or seat. The AP86 features a stud-type electrical terminal, so ensure compatibility with your vehicle’s ignition wire connectors. Inspect the spark plug hole for debris and clean if necessary to ensure proper seating and sealing. Replacing spark plugs in sets is recommended for balanced engine performance.

Quality Assurance and Warranty

Autolite’s Platinum Spark Plug line, including the AP86, is manufactured to meet OEM specifications for fit, form, and function. The use of platinum electrodes and high-quality ceramic insulators ensures durability and consistent performance. While specific warranty details may vary, Autolite products typically come with a limited warranty against defects in materials and workmanship. Consult product packaging or manufacturer resources for exact warranty terms.