Denso 5719 Spark Plug

Overview of Denso Iridium Racing Spark Plug 5719

The Denso Iridium Racing spark plug 5719 is engineered for Mazda RX-7 vehicles requiring precise ignition performance. Designed with advanced materials and specifications, this spark plug supports efficient combustion and reliable engine operation.

• Iridium center electrode tip for enhanced durability
• Full platinum ground electrode tip design
• Slant ground configuration with a single ground electrode
• Copper core center electrode for optimal conductivity
• Flat seat type with 14.00 mm thread diameter and 21.50 mm reach
• Pre-gap size of 0.7 mm for consistent spark delivery
• Manufacturer heat range rating of 27
• Hex size of 20.6 mm for installation

Detailed Features and Specifications

This Denso spark plug 5719 features an iridium center electrode tip, known for its high melting point and wear resistance, which contributes to longer service life and stable ignition. The ground electrode tip is fully platinum-coated, enhancing electrode durability and reducing erosion. The slant ground configuration with a single nickel core electrode optimizes spark exposure and combustion efficiency. The copper core center electrode improves thermal conductivity, helping maintain consistent operating temperatures.

With a pre-gap size of 0.7 mm, this spark plug ensures reliable spark generation suitable for the Mazda RX-7's ignition system. The flat seat type and 14.00 mm thread diameter provide secure mounting, while the 21.50 mm reach fits the engine design precisely. The heat range of 27 is calibrated to balance heat dissipation and prevent fouling under typical operating conditions.

About the Iridium Racing Product Line

The Denso Iridium Racing line focuses on delivering spark plugs with advanced electrode materials and designs tailored for performance and durability. This product line incorporates iridium and platinum tips to enhance ignition reliability and extend service intervals, making it suitable for vehicles like the Mazda RX-7 that demand consistent spark performance under varied driving conditions.

Applications and Problem Solving

• Compatible with Mazda RX-7 ignition systems requiring iridium spark plugs
• Addresses misfires caused by electrode wear or corrosion
• Reduces fouling issues through optimized heat range and electrode design
• Improves cold start performance with precise pre-gap sizing
• Supports stable combustion to enhance engine responsiveness

Installation Notes and Tips

When installing the Denso Iridium Racing spark plug 5719, ensure the spark plug gap is set to the specified 0.7 mm if adjustment is necessary. Use a 20.6 mm socket for proper torque application to avoid damage to the flat seat threads. It is recommended to inspect the ignition system components for wear or damage during replacement to maintain optimal performance.

Quality Assurance and Warranty

Denso manufactures the Iridium Racing spark plug 5719 to meet strict quality standards, ensuring consistent performance and durability. While specific warranty details are not provided, Denso products typically adhere to manufacturer quality controls and reliability benchmarks suitable for Mazda RX-7 applications.