Autolite 386 Spark Plug

Overview of Autolite Copper Resistor Spark Plug 386

The Autolite Copper Resistor Spark Plug 386 is engineered to deliver reliable ignition performance for a variety of vehicles. Designed with a copper core and resistor technology, this spark plug supports efficient combustion and reduces electrical interference in ignition systems.

• Resistance: 5000 ohms for noise suppression
• Ground Electrode Tip: Tapered nickel design
• Center Electrode Core: Copper for enhanced conductivity
• Electrical Terminal Type: Stud
• Pre-Gap Size: 0.025 inches (0.60 mm)
• Hex Size: 13/16 inch (21 mm)
• Thread Diameter: 18.0 mm with 0.500 inch (13.0 mm) reach
• Seat Type: Flat
• Insulator Material: Ceramic with short insulator type
• Resistor Type: Yes, to reduce radio frequency interference

Details on the Copper Resistor Spark Plug Product Line

The Autolite Copper Resistor Spark Plug line combines copper core electrodes with resistor technology to balance conductivity and noise reduction. This product line is designed to provide consistent spark delivery while minimizing electromagnetic interference that can affect vehicle electronics. The 386 model features a tapered nickel ground electrode tip and a standard center electrode design, making it suitable for applications requiring a flat seat and specific thread dimensions.

Technical Description and Applications

The Autolite Copper Resistor Spark Plug 386 incorporates a copper center electrode core for superior heat dissipation and electrical conductivity. The tapered nickel ground electrode tip enhances spark efficiency and durability. With a resistance rating of 5000 ohms, this spark plug helps suppress ignition noise that can interfere with onboard electronics. The ceramic insulator with a short design supports reliable insulation and heat management. The flat seat and 18 mm thread diameter with a 13 mm reach make it compatible with various vehicle engines requiring these specifications.

Common Issues Addressed by Autolite Spark Plug 386

• Misfiring due to worn or inefficient spark plugs
• Ignition noise affecting radio and electronic systems
• Poor fuel combustion leading to reduced engine performance
• Difficulty starting engines in cold conditions
• Excessive electrode wear causing inconsistent spark

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 pre-gap to 0.025 inches (0.60 mm) if necessary
• Ensure the flat seat properly mates with the cylinder head to prevent compression leaks
• Inspect ignition wires and terminals for wear during replacement

Quality Assurance and Warranty

Autolite spark plugs are manufactured to meet industry standards for durability and performance. The Copper Resistor Spark Plug 386 undergoes rigorous quality control to ensure consistent resistance and electrode integrity. While specific warranty details may vary, Autolite products typically come with a limited warranty against manufacturing defects. Consult vehicle and product documentation for exact warranty terms.