Bosch 9660 Spark Plug

Overview of Bosch OE Fine Wire Double Iridium Spark Plug 9660

The Bosch OE Fine Wire Double Iridium Spark Plug 9660 is engineered for reliable ignition performance in a variety of vehicles including Ford F-150, Chevrolet Cavalier, and Lincoln Continental. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and consistent engine operation.

• Double iridium center and ground electrode tips for durability
• Tapered ground electrode tip design with standard ground configuration
• 1.3 mm pre-gap size optimized for ignition efficiency
• Resistor type spark plug with 6000 ohm resistance to reduce electrical noise
• Compatible with 4-cycle engines in select Buick, Ford, Chevrolet, and other makes

Detailed Features and Specifications

The Bosch OE Fine Wire Double Iridium spark plug features a 16 mm hex size and a 17.5 mm reach with a 14 mm thread diameter, ensuring proper fitment in compatible engines. The center electrode is made from iridium with a nickel-yttrium and copper core, while the ground electrode tip combines platinum-iridium and nickel-yttrium for enhanced wear resistance. The ceramic insulator is projected and designed to withstand high temperatures, supported by a manufacturer heat range rating of 8. The tapered seat type and single ground electrode configuration contribute to stable spark delivery and combustion efficiency.

OE Fine Wire Double Iridium Product Line

The OE Fine Wire Double Iridium line by Bosch focuses on precision-engineered spark plugs that utilize fine wire iridium electrodes on both the center and ground sides. This design reduces voltage requirements and improves ignitability, which can lead to smoother engine starts and better fuel efficiency. The 9660 part number is part of this line, offering a balance of durability and performance for secondary ignition systems in various vehicle models.

Compatible Vehicles and Applications

• Ford F-150 and F-150 Heritage 4-cycle engines
• Chevrolet Cavalier and Lumina models
• Lincoln Continental and Mark VII
• Buick Century and Regal
• Other compatible makes include GMC, Isuzu, Mazda, Mercury, Oldsmobile, Pontiac, and Land Rover

Common Issues Addressed by Bosch Spark Plug 9660

• Misfiring or rough idling in 4-cycle engines
• Reduced fuel efficiency due to incomplete combustion
• Difficulty starting vehicles like the Ford Explorer or Chevrolet S10
• Engine hesitation or power loss under load
• Electrical interference affecting ignition system performance

Installation Notes and Tips

Ensure the spark plug gap is set to the specified 1.3 mm pre-gap before installation. Use a torque wrench to tighten the spark plug to manufacturer specifications to avoid damage to the tapered seat. The 16 mm hex size allows for standard spark plug socket compatibility. It is recommended to replace all spark plugs in the engine simultaneously for balanced performance. Verify compatibility with your vehicle’s make and model, such as the Mercury Cougar or Pontiac Sunfire, before installation.

Quality Assurance and Warranty

Bosch OE Fine Wire Double Iridium spark plugs are manufactured to meet OEM standards, ensuring consistent quality and performance. The use of high-grade materials like iridium and platinum-iridium alloys contributes to extended service life. While specific warranty details may vary, Bosch typically offers coverage against manufacturing defects. Refer to Bosch’s official documentation for warranty terms related to part number 9660.