Bosch 9656 Spark Plug

Overview of Bosch OE Fine Wire Double Iridium Spark Plug 9656

The Bosch OE Fine Wire Double Iridium Spark Plug 9656 is engineered for reliable ignition performance in select Chrysler, Dodge, Jeep, and Plymouth vehicles. 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
• Tapered ground electrode tip design with platinum-iridium and nickel-yttrium materials
• Standard ground configuration with a single ground electrode
• Flat seat type and 19mm reach for proper fitment
• Resistor type spark plug with 6000 ohm resistance to reduce electrical noise
• Ceramic projected insulator for improved heat dissipation
• Hex size 16mm and thread diameter 14mm for secure installation
• Manufacturer heat range rating of 8 suitable for various engine conditions

Detailed Product Description

The Bosch OE Fine Wire Double Iridium spark plug 9656 features a fine wire iridium center electrode tip combined with a platinum-iridium and nickel-yttrium ground electrode tip. This combination provides a stable and efficient spark, contributing to improved combustion and fuel efficiency. The tapered ground electrode tip design reduces quenching and promotes better flame propagation. The spark plug’s ceramic projected insulator enhances heat resistance and electrical insulation, while the flat seat type ensures a proper seal within the combustion chamber. With a pre-gap size of 1mm and a reach of 19mm, this spark plug is engineered to meet the exacting standards required by Chrysler, Dodge, Jeep, and Plymouth models such as the Jeep Wrangler, Dodge Ram 1500, and Chrysler Concorde.

The OE Fine Wire Double Iridium product line from Bosch is designed to provide long service life and consistent ignition performance. This line focuses on fine wire electrodes made from iridium and platinum alloys, which offer improved wear resistance and stable spark characteristics compared to conventional spark plugs. The 9656 part number is part of this line, ensuring compatibility and performance for secondary ignition systems in 4-cycle engines.

Compatible Vehicles and Applications

This spark plug is compatible with a range of Chrysler, Dodge, Jeep, and Plymouth vehicles, including but not limited to:

• Jeep Cherokee, Wrangler TJ, CJ5, CJ7, and Scrambler
• Dodge Ram 1500, Dakota, and Viper
• Chrysler Concorde, Intrepid, LHS, New Yorker, and Prowler
• Plymouth Grand Cherokee and Wagoneer models

Common Issues Addressed by Bosch Spark Plug 9656

• Misfiring or rough engine idle due to worn or fouled spark plugs
• Reduced fuel efficiency caused by inconsistent ignition
• Difficulty starting the engine in cold or damp conditions
• Engine hesitation or loss of power under acceleration
• Excessive emissions resulting from incomplete combustion

Installation Notes and Tips

• Ensure the spark plug gap is set to the manufacturer’s recommended 1mm pre-gap before installation
• Use a torque wrench to tighten the spark plug to the vehicle’s specified torque to avoid damage
• Inspect the spark plug threads and combustion chamber for debris before installation
• Replace spark plugs in sets to maintain consistent engine performance
• Allow the engine to cool before removing or installing spark plugs to prevent thread damage

Quality Assurance and Warranty

Bosch OE Fine Wire Double Iridium spark plugs are manufactured to meet strict OEM standards for fit, form, and function. The use of high-quality materials such as iridium and platinum alloys ensures durability and long service life. This spark plug includes a built-in resistor with 6000 ohm resistance to minimize electrical interference with vehicle electronics. While specific warranty details may vary, Bosch products typically come with a limited warranty covering defects in materials and workmanship.