Denso 4704 Spark Plug

Overview of Denso Iridium TT Spark Plug 4704

The Denso Iridium TT spark plug 4704 is engineered for reliable ignition performance across a wide range of vehicles including Acura, BMW, Ford, Honda, Toyota, and more. Designed with advanced materials and a twin-tip ground electrode, this spark plug supports efficient combustion and consistent engine operation.

• Iridium center electrode tip for enhanced durability
• Platinum twin-tip ground electrode design
• Copper core center electrode for improved conductivity
• Flat seat type with 14mm thread diameter and 26.5mm reach
• Pre-gap size of 1.0 mm for optimal spark delivery
• Hex size of 16.0 mm for standard installation tools
• Manufacturer heat range rating of 20

Detailed Features and Specifications

The Denso Iridium TT 4704 spark plug features a copper core center electrode with an iridium tip, which provides a balance of excellent electrical conductivity and long service life. The ground electrode is constructed with a nickel core and features a platinum twin-tip design, enhancing spark efficiency and reducing electrode wear. The single ground electrode with a twin-tip configuration improves ignition reliability and combustion stability. With a resistance rating of 5000 ohms, this spark plug helps suppress electrical noise that can interfere with vehicle electronics.

The spark plug’s flat seat and 14mm thread diameter ensure compatibility with many popular models such as the Toyota Camry, Ford F-150, Honda Civic, and BMW 3 Series. The 26.5mm reach and 1.0mm pre-gap size are optimized for precise spark gap control, contributing to smoother engine starts and consistent power delivery.

About the Iridium TT Product Line

The Denso Iridium TT line is designed to combine the durability of iridium with the efficiency of a twin-tip ground electrode. This configuration aims to improve ignition performance and fuel efficiency while maintaining long service intervals. The Iridium TT spark plugs are suitable for a variety of secondary ignition applications, making them a practical choice for vehicles requiring reliable spark plug performance under diverse driving conditions.

Applications and Problem Solving

• Compatible with Acura, BMW, Ford, Honda, Toyota, and other makes/models listed
• Addresses misfires caused by worn or inefficient spark plugs
• Helps improve cold starts and throttle response
• Reduces fouling and electrode wear in high-heat environments
• Supports stable combustion to lower emissions and improve fuel economy

Installation Notes and Tips

• Use a 16mm socket wrench for installation or removal
• Ensure the spark plug gap is set to 1.0 mm before installation if adjustment is needed
• Apply anti-seize compound sparingly on threads to prevent galling
• Torque to manufacturer specifications to avoid damage to the spark plug or cylinder head
• Inspect ignition coils and wiring for optimal performance after installation

Quality Assurance and Warranty

Denso manufactures the Iridium TT 4704 spark plug to meet strict quality standards, ensuring consistent performance and durability. The use of premium materials such as iridium and platinum contributes to extended service life. While specific warranty details may vary, Denso products typically come with a limited warranty against manufacturing defects. Refer to vehicle and part documentation for exact warranty terms.