NGK 3967 Spark Plug

Reliable Ignition with NGK Standard Spark Plug 3967

The NGK Standard Spark Plug 3967 is engineered to deliver consistent ignition performance for a range of vehicles including Chevrolet, Lexus, and Toyota models. Designed with durable materials and precise specifications, this spark plug supports efficient combustion and engine reliability.

• Resistance: 5000 ohms for optimal electrical performance
• Ground Electrode Tip Design: Standard for reliable spark delivery
• Ground Electrode Core Material: Nickel for durability
• Center Electrode Core Material: Copper to enhance conductivity
• Center Electrode Tip Material: Nickel for wear resistance
• Pre-Gap Size: 0.044 inches for proper spark gap
• Ground Electrode Quantity: 2 for stable ignition
• Hex Size: 5/8 inch for standard installation tools
• Insulator Height: 50.50 mm ensuring proper insulation
• Manufacturer Heat Range: 5 suitable for moderate engine temperatures
• Seat Type: Flat for secure mounting
• Reach: 0.75 inches to fit specified engine designs
• Thread Diameter: 14.00 mm matching OEM specifications

About the NGK Standard Spark Plug Line

The Standard Spark Plug line by NGK is designed to meet original equipment specifications, providing dependable ignition performance for everyday driving conditions. This line focuses on delivering consistent spark and durability using quality materials such as copper and nickel, making it suitable for a wide range of vehicles including the Chevrolet 4Runner, Lexus GS300, and Toyota Supra.

Technical Details and Compatibility

The NGK 3967 spark plug features a non-removable nut electrical terminal type, ensuring a secure connection within the ignition system. Its dual ground electrodes and copper core center electrode optimize spark efficiency and longevity. The flat seat type and 14 mm thread diameter ensure compatibility with specific engine designs found in Chevrolet, Lexus, and Toyota models such as the Tacoma, Corolla, and Tundra. The pre-gap size of 0.044 inches is set to factory standards, reducing the need for adjustment during installation.

Common Applications and Problem Solving

• Restores engine misfire issues in Chevrolet 4Runner and Toyota Tundra
• Improves cold start performance in Lexus GS300 and Toyota Supra
• Reduces rough idling and hesitation in Toyota Corolla and Tacoma
• Maintains fuel efficiency by ensuring proper combustion
• Prevents spark plug fouling and premature wear

Installation Notes and Tips

Before installation, verify the spark plug gap is set to 0.044 inches as specified. Use a 5/8 inch socket for removal and installation to avoid damage. Ensure the spark plug is threaded by hand initially to prevent cross-threading. Torque to manufacturer specifications to secure the flat seat properly. This spark plug is compatible with vehicles including the Lexus SC300, Toyota Paseo, and Chevrolet Prizm.

Quality Assurance and Warranty

NGK Standard Spark Plugs are manufactured to meet strict quality standards, using high-grade materials such as copper and nickel for electrode construction. The part number 3967 corresponds to OEM specifications, ensuring reliable fit and function. While specific warranty details vary by distributor, NGK products typically come with a limited warranty covering defects in materials and workmanship.