Bosch 8117 Spark Plug

Reliable Ignition Performance for Select GM Vehicles

The Bosch OE Fine Wire Double Platinum spark plug 8117 is engineered to deliver consistent ignition performance for a range of General Motors vehicles. Designed with durable platinum electrodes and a precise pre-gap size, this spark plug supports efficient combustion and engine reliability.

• Double platinum electrodes for extended durability
• 6000 ohm resistance resistor to reduce electrical interference
• Standard ground electrode tip and configuration
• Pre-gap size of 1.1 mm for optimal spark delivery
• Tapered seat type with 14 mm thread diameter and 17.5 mm reach
• Ceramic projected insulator for improved heat dissipation
• Hex size 16 mm for standard installation tools
• Manufacturer heat range rating of 9 suitable for various engine conditions

About the OE Fine Wire Double Platinum Product Line

The Bosch OE Fine Wire Double Platinum line features spark plugs with fine wire electrodes made from platinum on both the center and ground electrodes. This design enhances wear resistance and maintains a stable spark gap over time, contributing to consistent engine performance. The 8117 spark plug benefits from this technology, providing reliable ignition for 4-cycle engines in vehicles such as the Chevrolet Impala, GMC Sierra 2500 HD, and Cadillac DeVille.

Technical Specifications and Features

The Bosch 8117 spark plug incorporates a center electrode core made of nickel-yttrium and copper, paired with platinum and nickel-yttrium ground electrode tips. This combination ensures durability and efficient conductivity. The ceramic insulator is projected to improve heat management and prevent fouling. With a resistance of 6000 ohms, the built-in resistor minimizes radio frequency interference, protecting vehicle electronics. The spark plug’s tapered seat and standard ground electrode configuration support a secure fit and reliable spark generation.

Compatible Vehicles and Applications

• Buick Century, Regal, and Skylark
• Cadillac DeVille and Seville
• Chevrolet Avalanche 2500, Impala, Malibu, Silverado 2500 HD, Suburban 2500
• GMC Sierra 2500 HD, Sierra 3500, Yukon XL 2500
• Oldsmobile Cutlass Ciera, Cutlass Supreme
• Pontiac Grand Prix, Sunbird, Tempest
• Saturn Aura, Vue

Common Issues Addressed by Bosch 8117 Spark Plug

• Engine misfires and rough idling
• Reduced fuel efficiency due to incomplete combustion
• Difficulty starting the engine in cold conditions
• Increased emissions from inefficient ignition
• Premature electrode wear affecting spark consistency

Installation Notes and Tips

When installing the Bosch 8117 spark plug, ensure the engine is cool to prevent damage to the threads. Use a torque wrench to tighten the spark plug to the manufacturer’s recommended specifications to avoid over-tightening or under-tightening. Verify the pre-gap size of 1.1 mm before installation, although the plug comes pre-gapped. The 16 mm hex size allows for compatibility with standard spark plug sockets. Replacement intervals should follow the vehicle manufacturer’s guidelines for platinum spark plugs.

Quality Assurance and Warranty

Bosch spark plugs, including the OE Fine Wire Double Platinum 8117, are manufactured to meet strict quality standards for durability and performance. The use of premium materials such as platinum electrodes and ceramic insulators ensures long service life. While specific warranty details may vary, Bosch typically offers coverage against manufacturing defects. Refer to Bosch’s official documentation for warranty terms applicable to this spark plug.