Denso 4006 Spark Plug

Reliable Ignition Performance with Denso U-Groove Conventional Spark Plug

The Denso 4006 spark plug delivers consistent ignition performance designed for a range of vehicles requiring a reliable secondary ignition component. Featuring a U-groove ground electrode tip and durable materials, this spark plug supports efficient combustion and engine operation.

• U-groove ground electrode tip design for improved spark exposure
• Standard ground configuration with a single ground electrode
• Nickel ground electrode core and tip for durability
• Copper center electrode core with nickel tip for optimal conductivity
• Pre-gap size of 0.7 mm for precise ignition timing
• Flat seat type with 14.00 mm thread diameter and 12.70 mm reach
• Hex size of 16.0 mm for standard installation tools
• Manufacturer heat range of 22 suitable for moderate engine temperatures

About the Denso U-Groove Conventional Product Line

The U-Groove Conventional line by Denso focuses on spark plugs with a unique U-groove ground electrode tip design. This design enhances spark exposure to the air-fuel mixture, promoting more efficient combustion compared to traditional flat electrodes. The conventional construction balances durability and performance, making it suitable for a variety of gasoline engines requiring standard ignition components.

Technical Details and Application

The Denso 4006 spark plug features a nickel ground electrode core and tip, providing resistance to wear and corrosion. The copper center electrode core ensures excellent thermal conductivity, while the nickel tip maintains consistent spark delivery. With a pre-gap size of 0.7 mm and a flat seat, this spark plug is engineered for precise ignition and compatibility with engines designed for a 14.00 mm thread diameter and 12.70 mm reach. The heat range 22 rating indicates suitability for engines operating under moderate thermal conditions.

Common Uses and Problem Solving

• Restores proper ignition in vehicles experiencing misfires or rough idling
• Improves fuel efficiency by ensuring consistent spark delivery
• Reduces engine hesitation during acceleration
• Helps maintain stable combustion in moderate temperature engines
• Replaces worn or fouled spark plugs in compatible makes and models

Installation Notes and Tips

Ensure the spark plug gap is set to 0.7 mm before installation if adjustment is necessary. Use a 16.0 mm socket wrench for proper tightening to avoid damage to the electrode or threads. Confirm compatibility with your vehicle’s engine specifications, particularly thread diameter and reach, to ensure proper fitment and sealing. Avoid over-tightening to prevent thread damage.

Quality Assurance and Warranty

Denso spark plugs, including the 4006 model, are manufactured to meet strict quality standards for ignition components. The use of nickel and copper materials supports durability and consistent performance. While specific warranty details are not provided, Denso products typically adhere to industry standards for reliability and manufacturing quality.