Denso 4019 Spark Plug

Reliable Ignition with Denso U-Groove Conventional Spark Plug 4019

The Denso U-Groove Conventional Spark Plug 4019 is engineered to deliver consistent ignition performance for a variety of vehicles. Designed with a U-groove ground electrode tip and quality core materials, this spark plug supports efficient combustion and engine reliability.

• 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 spark gap
• Flat seat type with 12.70 mm reach and 14.00 mm thread diameter
• Hex size of 20.6 mm for standard installation tools
• Manufacturer heat range rating of 16 for balanced thermal performance

About the U-Groove Conventional Product Line

The Denso U-Groove Conventional spark plug line features a unique U-groove ground electrode tip designed to increase spark exposure to the air-fuel mixture. This design enhances ignition efficiency compared to traditional flat or tapered electrodes. The conventional construction uses durable nickel and copper materials to maintain reliable performance across a range of driving conditions.

Technical Details and Performance

This spark plug’s ground electrode is made from nickel, providing resistance to wear and corrosion, while the copper core center electrode ensures excellent thermal conductivity and consistent spark delivery. The 0.7 mm pre-gap size is factory set to optimize ignition timing and combustion efficiency. With a flat seat and 12.70 mm reach, the Denso 4019 spark plug fits applications requiring these specific dimensions. The heat range of 16 indicates a moderate thermal rating suitable for many standard gasoline engines.

Applications and Problem Solving

• Restores proper ignition in engines experiencing misfires or rough idling
• Improves fuel efficiency by ensuring complete combustion
• Reduces carbon buildup with the U-groove electrode design
• Addresses spark plug fouling in vehicles requiring a heat range 16 plug
• Compatible with vehicles needing a 14 mm thread diameter and 12.70 mm reach spark plug

Installation Notes and Tips

Ensure the spark plug gap is checked before installation, although the pre-gap is factory set at 0.7 mm. Use a 20.6 mm socket wrench for proper tightening torque. Confirm compatibility with your vehicle’s make and model by verifying thread diameter, reach, and seat type. Avoid over-tightening to prevent damage to the cylinder head.

Quality Assurance

Denso manufactures the U-Groove Conventional spark plug 4019 to meet OEM specifications for ignition components. The use of nickel and copper materials supports durability and consistent performance. While no specific warranty information is provided, Denso products typically adhere to strict quality control standards to ensure reliability in secondary ignition systems.