Bosch 9655 Spark Plug

Overview of Bosch OE Fine Wire Double Iridium Spark Plug 9655

The Bosch OE Fine Wire Double Iridium Spark Plug 9655 is engineered for reliable ignition performance in a range of vehicles including Buick, Cadillac, Chevrolet, Ford, Lincoln, Mazda, Mercury, Oldsmobile, and Pontiac models. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and engine responsiveness.

• Double iridium center and ground electrode tips for enhanced durability
• Tapered ground electrode tip design with a standard ground configuration
• Pre-gap size of 1.3 mm optimized for consistent spark delivery
• Resistor value of 6000 ohms to reduce electrical noise
• Hex size of 16 mm and thread diameter of 14 mm for proper fitment
• Manufacturer heat range rating of 8 suitable for various engine conditions
• Ceramic insulator with non-projected design for reliable insulation
• Reach length of 17.5 mm and tapered seat type for secure installation

Details on Bosch OE Fine Wire Double Iridium Technology

The OE Fine Wire Double Iridium line from Bosch features spark plugs with fine wire electrodes made from iridium and platinum-iridium alloys. This combination provides improved wear resistance and stable spark performance over time. The center electrode core is constructed from nickel-yttrium and copper, enhancing conductivity and heat dissipation. The ground electrode tip uses a platinum-iridium and nickel-yttrium blend, contributing to longer service life and consistent ignition. These design elements make the 9655 spark plug suitable for 4-cycle engines requiring precise ignition control.

Applications and Problem Solving

This Bosch spark plug is compatible with a wide range of vehicles, including the Ford F-150, Chevrolet Camaro, Buick Regal, Pontiac Grand Am, and Cadillac DeVille, among others. It addresses common ignition-related issues such as:

• Misfires and rough idling caused by worn or fouled spark plugs
• Reduced fuel efficiency due to inconsistent spark delivery
• Difficulty starting engines in cold or variable conditions
• Engine hesitation or loss of power under load
• Excessive emissions from incomplete combustion

Installation Notes and Tips

When installing the Bosch 9655 spark plug, ensure the tapered seat is clean and free of debris for proper sealing. Use a torque wrench to tighten the spark plug to manufacturer specifications to avoid damage to the threads or insulator. The 16 mm hex size allows for standard spark plug socket compatibility. Verify the pre-gap size of 1.3 mm before installation, adjusting if necessary to match vehicle requirements. This spark plug is designed for 4-cycle engines and is not intended for outdoor power equipment.

Quality Assurance and Warranty

Bosch OE Fine Wire Double Iridium spark plugs are manufactured to meet strict quality standards, ensuring consistent performance and durability. The use of high-grade ceramic insulators and premium electrode materials supports long service intervals. While specific warranty details may vary, Bosch typically offers coverage against manufacturing defects, providing confidence in the product's reliability for compatible Buick, Cadillac, Chevrolet, Ford, Lincoln, Mazda, Mercury, Oldsmobile, and Pontiac vehicles.