NGK 4374 Spark Plug

Reliable Ignition with NGK Standard Spark Plug 4374

The NGK Standard Spark Plug 4374 is engineered to deliver consistent ignition performance for a variety of vehicles. Designed with durable materials and precise specifications, this spark plug supports efficient combustion and engine reliability.

• Resistance: 5000 ohms for stable electrical flow
• Ground Electrode Tip and Configuration: Standard design with two ground electrodes
• Core Materials: Copper center electrode with nickel tip and nickel ground electrode core
• Electrical Terminal: Non-removable nut type for secure connection
• Pre-Gap Size: 0.028 inches for optimal spark gap
• Hex Size: 5/8 inch for standard installation tools
• Insulator Height: 50.50 mm ensuring proper insulation
• Manufacturer Heat Range: 8 suitable for moderate heat conditions
• Seat Type: Flat for consistent sealing
• Thread Diameter: 10.00 mm with 0.75 inch reach

About the NGK Standard Spark Plug Line

The NGK Standard Spark Plug line is designed to meet OEM specifications for a wide range of vehicles, providing dependable ignition performance without specialized features. The 4374 part number belongs to this line, offering a balance of durability and efficiency with standard electrode designs and materials such as copper and nickel. This makes it suitable for everyday driving conditions and routine maintenance.

Technical Details and Performance

The NGK 4374 spark plug features a copper core center electrode with a nickel tip, which helps maintain consistent conductivity and wear resistance. The dual ground electrodes, also made of nickel, provide a stable spark path and contribute to longer service life. The 5000 ohm resistance helps reduce radio frequency interference, ensuring smooth engine operation. With a pre-gap of 0.028 inches and a flat seat type, this spark plug ensures proper combustion chamber sealing and ignition timing.

Compatible Vehicles and Common Applications

• Replacement for vehicles requiring a 10 mm thread diameter and 0.75 inch reach spark plug
• Suitable for engines designed to use a heat range 8 spark plug
• Ideal for models from manufacturers such as Honda, Toyota, and Nissan that specify NGK Standard Spark Plug 4374 or Cr8ekb
• Used in secondary ignition systems requiring a non-removable nut terminal
• Addresses issues like misfires, poor fuel economy, and rough idling

Installation Notes and Tips

When installing the NGK 4374 spark plug, ensure the spark plug gap is checked and adjusted if necessary to 0.028 inches. Use a 5/8 inch socket for proper torque application. The flat seat design requires careful tightening to avoid damage to the sealing surface. Always follow the vehicle manufacturer’s torque specifications to prevent thread damage or improper sealing.

Quality Assurance and Warranty

NGK spark plugs are manufactured to meet strict quality standards, ensuring reliable performance and durability. The Standard Spark Plug line, including part number 4374, undergoes rigorous testing for electrical resistance, heat range, and material integrity. While specific warranty details are not provided here, NGK products typically come with manufacturer-backed quality assurance to support vehicle maintenance needs.