Bosch 8106 Spark Plug

Reliable Ignition Performance for Select GM Vehicles

The Bosch OE Fine Wire Double Platinum Spark Plug 8106 is engineered to deliver consistent ignition and efficient combustion for a range of Buick, Cadillac, Chevrolet, GMC, Oldsmobile, and Pontiac models. Designed with durable platinum electrodes and a tapered seat, this spark plug supports optimal engine performance and longevity.

• Double platinum center and ground electrode tips for extended wear
• 6000 ohm resistor to reduce electrical interference
• Standard ground electrode tip and configuration
• 1.5 mm pre-gap size for precise spark delivery
• Compatible with 4-cycle engines
• Thread diameter of 14 mm and reach of 17.5 mm
• Hex size of 16 mm for easy installation
• Ceramic non-projected insulator for reliable insulation
• Manufacturer heat range rating of 8

About the Bosch OE Fine Wire Double Platinum Line

The OE Fine Wire Double Platinum product line from Bosch features spark plugs with fine wire electrodes made of platinum on both the center and ground electrodes. This design enhances durability and provides stable ignition performance over time. The double platinum construction reduces electrode wear and maintains consistent spark gap, which is critical for maintaining engine efficiency and emissions compliance in vehicles such as the Chevrolet Impala, Cadillac DeVille, and Pontiac Grand Prix.

Technical Details and Specifications

The Bosch 8106 spark plug incorporates a nickel-yttrium and copper core center electrode with a platinum tip, paired with a platinum and nickel-yttrium ground electrode tip. The tapered seat ensures a secure fit in the combustion chamber, while the 6000 ohm resistor minimizes radio frequency interference. The spark plug’s 1.5 mm pre-gap size and heat range 8 rating are optimized for a variety of GM vehicles including the Buick Century, GMC C2500, and Oldsmobile Cutlass Supreme. Its ceramic insulator is non-projected, providing reliable insulation and heat dissipation.

Applications and Common Issues Addressed

• Restores proper ignition timing and spark consistency
• Reduces misfires and rough idling in compatible GM models
• Improves fuel efficiency by ensuring complete combustion
• Minimizes electrode wear for longer service intervals
• Helps maintain emissions compliance in 4-cycle engines

Installation Notes and Tips

When installing the Bosch 8106 spark plug, ensure the tapered seat matches the engine’s cylinder head specifications. Use a torque wrench to tighten to manufacturer-recommended torque values to avoid damage. The 16 mm hex size allows for standard spark plug socket compatibility. Check and adjust the spark plug gap if necessary, although the pre-gap of 1.5 mm is factory set for most compatible GM vehicles. Always replace spark plugs in sets to maintain balanced engine performance.

Quality Assurance and Warranty

Bosch spark plugs are manufactured to meet strict OEM standards, ensuring reliable performance and durability. The OE Fine Wire Double Platinum spark plug 8106 includes a built-in resistor to reduce electrical noise and protect vehicle electronics. While specific warranty terms may vary, Bosch products typically come with a limited warranty covering defects in materials and workmanship.