NGK 4268 Spark Plug

Reliable Ignition Performance for Select American Vehicles

The NGK V-Power Spark Plug 4268 is engineered to deliver consistent ignition performance for a range of Buick, Cadillac, Chrysler, Dodge, Oldsmobile, Plymouth, and Pontiac 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 and Configuration: Standard design with a single nickel ground electrode
• Center Electrode: Copper core with nickel tip for balanced conductivity and durability
• Pre-Gap Size: 0.060 inches for proper spark gap
• Thread Diameter: 14.00 mm with 0.75 inch reach and flat seat type
• Hex Size: 13/16 inch for standard installation tools
• Electrical Terminal: Non-removable nut type
• Manufacturer Heat Range: 4, suitable for moderate heat dissipation
• Insulator Height: 55.00 mm for reliable insulation

About the NGK V-Power Spark Plug Line

The V-Power Spark Plug line by NGK focuses on delivering dependable ignition components that meet OEM specifications. This product line balances performance and durability by using quality materials such as copper core center electrodes and nickel tips, ensuring stable spark delivery and resistance to wear. The 4268 part number is part of this line, designed to maintain engine efficiency and smooth operation in compatible vehicles.

Technical Details and Compatibility

The NGK 4268 spark plug features a single ground electrode made of nickel, paired with a copper core center electrode also tipped with nickel. This combination provides a reliable spark path and good thermal conductivity. The 5000 ohm resistance helps reduce electrical noise interference with vehicle electronics. Its flat seat and 14 mm thread diameter with a 0.75 inch reach make it suitable for specific ignition systems in various American cars and minivans.

Compatible Vehicles and Applications

• Buick models including LeMans and Skylark
• Cadillac DeVille, Eldorado, and Seville
• Chrysler Concorde and Intrepid
• Dodge Caravan, Grand Caravan, and Grand Voyager
• Oldsmobile Firenza and Cutlass
• Plymouth Voyager and Grand Voyager
• Pontiac Sunbird and Grand Am

Common Issues Addressed by NGK 4268 Spark Plug

• Engine misfires due to worn or faulty spark plugs
• Reduced fuel efficiency from incomplete combustion
• Hard starting or rough idling conditions
• Ignition system electrical interference
• Excessive spark plug fouling or electrode wear

Installation Notes and Tips

Ensure the engine is cool before removing old spark plugs. Use a torque wrench to tighten the NGK 4268 spark plug to manufacturer specifications to avoid damage. The 13/16 inch hex size fits standard spark plug sockets. Verify the pre-gap size of 0.060 inches before installation, adjusting if necessary. The non-removable nut terminal requires compatible ignition wires or boots.

Quality Assurance and Warranty

NGK spark plugs are manufactured to meet strict quality standards, ensuring consistent performance and durability. The V-Power Spark Plug 4268 undergoes rigorous testing for resistance, heat range, and material integrity. While specific warranty details vary by distributor, NGK products typically come with a limited warranty against manufacturing defects.