Denso 4028 Spark Plug

Overview of Denso 4028 U-Groove Conventional Spark Plug

The Denso 4028 spark plug is engineered for reliable secondary ignition performance. Featuring a U-groove ground electrode tip design, this spark plug supports efficient combustion and consistent engine operation in various vehicle applications.

• U-groove ground electrode tip 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 0.8 mm for precise ignition timing
• Flat seat type with 19.00 mm reach and 14.00 mm thread diameter
• Hex size of 20.6 mm for standard installation tools
• Manufacturer heat range rating of 24 for balanced thermal performance

Detailed Product Description

The Denso 4028 spark plug belongs to the U-Groove Conventional product line, designed to provide dependable ignition with a focus on durability and consistent spark delivery. The U-groove ground electrode tip enhances the spark exposure area, which can contribute to more efficient combustion and smoother engine operation. The spark plug features a nickel ground electrode core and tip, offering resistance to wear and corrosion. The center electrode combines a copper core for excellent thermal conductivity with a nickel tip to maintain electrode integrity under high temperatures.

With a pre-gap size of 0.8 mm, this spark plug is set to optimize ignition timing and combustion efficiency. The flat seat design ensures a secure fit in compatible cylinder heads, while the 19.00 mm reach and 14.00 mm thread diameter align with specific engine requirements. The 20.6 mm hex size allows for straightforward installation using common spark plug sockets. The heat range of 24 is calibrated to balance heat dissipation and prevent fouling in typical operating conditions.

Applications and Problem Solving

• Compatible with vehicles requiring a 14 mm thread diameter and 19 mm reach spark plug
• Addresses issues related to inconsistent ignition and misfires
• Helps reduce carbon buildup on the electrode tip
• Supports stable engine performance under varied driving conditions
• Suitable for engines needing a heat range 24 spark plug for optimal thermal management

Installation Notes and Tips

Ensure the spark plug gap is verified before installation, although the pre-gap is set at 0.8 mm from the factory. Use a torque wrench to tighten the spark plug to the manufacturer’s specifications to avoid damage to the threads or cylinder head. The 20.6 mm hex size is compatible with standard spark plug sockets, facilitating straightforward removal and installation. Confirm compatibility with your vehicle’s make and model based on thread diameter, reach, and heat range requirements.

Quality Assurance

Denso manufactures the 4028 spark plug to meet stringent quality standards for ignition components. The use of nickel and copper materials in the electrodes ensures durability and consistent performance over time. While no specific warranty information is provided, Denso’s reputation in automotive ignition parts supports reliable product quality and longevity.