Bosch 6729 Spark Plug

Overview of Bosch OE Fine Wire Platinum Spark Plug 6729

The Bosch OE Fine Wire Platinum Spark Plug 6729 is engineered for reliable ignition performance in select Chrysler, Dodge, and Plymouth vehicles. Designed to meet OEM specifications, this spark plug supports efficient combustion and consistent engine operation.

• Platinum center electrode tip for enhanced durability
• Tapered ground electrode tip design for precise spark delivery
• 6000 ohm resistor to reduce electrical interference
• Flat seat type with a 14mm thread diameter and 19mm reach
• Compatible with 4-cycle engines in Chrysler, Dodge, and Plymouth models

Detailed Product Features and Specifications

This Bosch spark plug features a platinum center electrode tip combined with a nickel-yttrium ground electrode tip, providing a balance of wear resistance and conductivity. The center electrode core is constructed from a nickel-yttrium and copper alloy, enhancing thermal conductivity and durability. The insulator is made from ceramic with a projected design to improve ignition efficiency. The spark plug has a pre-gap size of 1.3 mm and a manufacturer heat range rating of 8, suitable for moderate to high operating temperatures. Its tapered ground electrode tip and standard ground configuration ensure consistent spark generation. The spark plug also includes a 6000 ohm resistor to minimize radio frequency interference, supporting vehicle electronics.

OE Fine Wire Platinum Product Line Details

The OE Fine Wire Platinum line by Bosch focuses on delivering spark plugs with fine wire electrodes that reduce voltage requirements and improve ignitability. This product line is designed to provide a balance of longevity and performance, making it suitable for vehicles requiring precise ignition components. The 6729 spark plug exemplifies this line’s emphasis on durable platinum tips and optimized electrode design for consistent engine performance.

Compatible Vehicles and Common Applications

• Chrysler Caravan, Grand Caravan, Town & Country
• Dodge Intrepid, Dynasty, Grand Voyager, Voyager
• Plymouth Concorde, New Yorker, Imperial

This spark plug is intended for use in 4-cycle engines of these models, ensuring proper fitment and ignition characteristics.

Common Issues Addressed by Bosch Spark Plug 6729

• Engine misfires due to worn or damaged spark plugs
• Reduced fuel efficiency from inconsistent ignition
• Difficulty starting the engine in cold or damp conditions
• Increased emissions caused by incomplete combustion
• Interference with vehicle electronics from spark plug noise

Installation Notes and Tips

When installing the Bosch OE Fine Wire Platinum Spark Plug 6729, ensure the spark plug gap is set to the specified 1.3 mm pre-gap size if adjustment is necessary. Use a torque wrench to tighten the spark plug to manufacturer-recommended specifications to avoid damage to the flat seat and ensure proper sealing. Inspect the spark plug threads and cylinder head for cleanliness before installation. This spark plug is designed for a 14 mm thread diameter and 19 mm reach, so verify compatibility with your vehicle’s engine.

Quality Assurance and Warranty

Bosch spark plugs are manufactured to meet strict OEM standards, ensuring consistent quality and performance. The OE Fine Wire Platinum 6729 spark plug includes a built-in resistor to reduce electrical interference, supporting vehicle electronics. While specific warranty details may vary, Bosch products typically come with a limited warranty against manufacturing defects. Consult your vehicle’s service manual or Bosch documentation for detailed warranty information.