NGK 4786 Spark Plug

Reliable Ignition with NGK Standard Spark Plug 4786

The NGK Standard Spark Plug 4786 is engineered to provide consistent ignition performance for a wide range of vehicles. Designed with durable materials and precise specifications, this spark plug supports efficient combustion and engine reliability.

• Resistance rating of 5000 ohms for optimal electrical performance
• Standard ground electrode tip and configuration for dependable spark delivery
• Nickel ground electrode core and tip for durability
• Copper center electrode core with nickel tip for effective heat transfer
• Pre-gap size of 0.036 inches to ensure proper spark gap
• Single ground electrode with a 14mm hex size for easy installation
• Flat seat type with 26.5mm reach and 12mm thread diameter
• Manufacturer heat range of 8 suitable for various engine conditions
• Non-removable nut electrical terminal type for secure connection
• Insulator height of 50.00mm for reliable insulation

About the NGK Standard Spark Plug Line

The NGK Standard Spark Plug line is designed to meet the requirements of everyday driving and standard engine configurations. This product line focuses on providing reliable ignition components with proven materials such as nickel and copper, ensuring consistent performance and longevity. The Standard Spark Plug 4786 is part of this line, offering a balance of durability and efficiency for compatible vehicles.

Technical Details and Performance

The NGK 4786 spark plug features a copper core center electrode with a nickel tip, which enhances heat conductivity and helps maintain stable combustion temperatures. The single ground electrode design with a nickel core and tip supports consistent spark generation. With a resistance of 5000 ohms, this spark plug reduces electrical noise and interference, contributing to smoother engine operation. The flat seat and 26.5mm reach ensure proper fitment in engines requiring these specifications, while the 14mm hex size allows for straightforward installation using standard tools.

Common Applications and Problem Solving

• Restores engine misfire issues caused by worn or fouled spark plugs
• Improves cold start performance in compatible vehicles
• Reduces rough idling and hesitation during acceleration
• Helps maintain fuel efficiency by ensuring proper ignition timing
• Prevents ignition system interference with 5000 ohm resistance

Installation Notes and Tips

When installing the NGK Standard Spark Plug 4786, ensure the pre-gap of 0.036 inches is maintained or adjusted according to the vehicle manufacturer’s specifications. Use a torque wrench to tighten the spark plug to the recommended torque to avoid damage to the threads or seat. The 14mm hex size fits standard spark plug sockets, and the flat seat design requires proper seating to prevent compression leaks. Always inspect the ignition system components for wear or damage during replacement.

Quality Assurance and Warranty

NGK spark plugs are manufactured to meet strict quality standards, ensuring reliable performance and durability. The Standard Spark Plug 4786 undergoes rigorous testing for electrical resistance, heat range, and material integrity. While specific warranty details may vary, NGK products typically come with manufacturer-backed quality assurance to support long-term use in compatible vehicles.