NGK 6509 Spark Plug

NGK Iridium IX Spark Plug Overview

The NGK Iridium IX Spark Plug 6509 is engineered for reliable ignition performance in a variety of vehicles including Buick, Cadillac, Chevrolet, Ford, and GMC models. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and consistent engine operation.

• Iridium center electrode tip for enhanced durability and ignition
• Taper cut ground electrode tip design for improved spark exposure
• Copper core center electrode for optimal conductivity
• Standard ground configuration with nickel ground electrode core
• Non-removable nut electrical terminal type for secure connection
• Pre-gap size of 0.044 inches for precise spark gap
• Tapered seat type and 14mm thread diameter for proper fitment
• Hex size of 5/8 inch for easy installation
• Manufacturer heat range of 6 suitable for various engine conditions

Iridium IX Spark Plug Product Line Details

The Iridium IX Spark Plug line by NGK is designed to provide enhanced ignition performance and longer service life compared to conventional spark plugs. Featuring an iridium center electrode tip, these plugs offer improved wear resistance and stable spark delivery. The 6509 part number belongs to this line, ensuring compatibility with multiple vehicle makes and models while maintaining consistent ignition quality.

Technical Specifications and Features

This spark plug features a copper core center electrode that promotes excellent electrical and thermal conductivity, paired with an iridium tip that resists erosion. The ground electrode uses a nickel core with a taper cut design to optimize spark exposure and combustion efficiency. The plug’s pre-gap is set at 0.044 inches, supporting reliable ignition timing. Its tapered seat and 14mm thread diameter ensure a secure fit in compatible engines. The non-removable nut terminal type provides a stable electrical connection, and the 5/8 inch hex size allows for straightforward installation.

Compatible Vehicles and Applications

• Buick models such as LaCrosse and Enclave
• Cadillac CTS, ATS, and SRX
• Chevrolet Camaro, Colorado, and Impala
• Ford F-150, Explorer, and Mustang
• GMC Canyon and Terrain
• Lincoln MKS, MKX, and MKZ
• Mazda MX-5 Miata
• Additional fitment includes Pontiac G6, Saab 9-4X, Saturn Aura, Suzuki Grand Vitara, and more

Common Issues Addressed by NGK Iridium IX Spark Plug 6509

• Misfiring or rough engine idle
• Reduced fuel efficiency due to incomplete combustion
• Difficulty starting the engine in cold conditions
• Engine hesitation or loss of power under acceleration
• Excessive spark plug wear leading to ignition problems

Installation Notes and Tips

Before installation, verify the spark plug gap is set to 0.044 inches as specified. Use a torque wrench to tighten the spark plug to the manufacturer’s recommended torque to avoid damage to the tapered seat. The 5/8 inch hex size allows for compatibility with standard spark plug sockets. Ensure the ignition system components are clean and in good condition to maximize performance. This spark plug is designed for direct replacement in compatible Buick, Cadillac, Chevrolet, Ford, and GMC vehicles among others.

Quality Assurance and Warranty

NGK manufactures the Iridium IX Spark Plug 6509 to meet strict quality standards, ensuring consistent performance and durability. The use of iridium and copper materials contributes to extended service life and reliable ignition. While specific warranty details may vary, NGK products typically come with manufacturer-backed quality assurance to support customer confidence in fitment and function.