Denso 3239 Spark Plug

Reliable Ignition Performance for Chrysler, Dodge, and Plymouth Vehicles

The Denso Double Platinum 3239 spark plug is engineered to provide consistent ignition and efficient combustion for select Chrysler, Dodge, and Plymouth models. Designed specifically for vehicles like the Caravan, Grand Caravan, Grand Voyager, Town & Country, and Voyager, this spark plug supports optimal engine performance and fuel efficiency.

• Double Platinum electrodes for enhanced durability and stable ignition
• 5000 ohm resistance to reduce electrical noise and protect ignition components
• Platinum chip ground electrode tip and platinum center electrode tip for improved wear resistance
• Copper core center electrode for efficient heat dissipation
• Standard ground configuration with a single ground electrode made of nickel
• Pre-gap size of 1.3 mm for precise spark delivery
• Flat seat type with 14 mm thread diameter and 19 mm reach for proper fitment
• Hex size of 20.6 mm for easy installation and removal
• Manufacturer heat range rating of 16 to match engine requirements

About the Denso Double Platinum Spark Plug Line

The Double Platinum line from Denso features spark plugs with platinum material on both the center and ground electrodes. This design enhances electrode longevity and maintains consistent spark performance over time. The 3239 part number benefits from this technology, offering reliable ignition and reduced electrode wear compared to conventional plugs, making it suitable for the ignition systems in Chrysler, Dodge, and Plymouth minivans and wagons.

Technical Details and Compatibility

The Denso 3239 spark plug is compatible with Chrysler Caravan, Dodge Grand Caravan, Plymouth Grand Voyager, Chrysler Town & Country, and Plymouth Voyager models. Its 14 mm thread diameter and 19 mm reach ensure proper seating and fitment in these vehicles. The flat seat type and 20.6 mm hex size facilitate straightforward installation. The copper core center electrode improves heat transfer, while the platinum tips on both electrodes provide durability and consistent spark quality. The 5000 ohm resistance helps minimize radio frequency interference, protecting sensitive electronic components.

Common Issues Addressed by This Spark Plug

• Engine misfires and rough idling due to worn or inefficient spark plugs
• Reduced fuel efficiency caused by incomplete combustion
• Difficulty starting the engine in cold or damp conditions
• Ignition system interference affecting electronic components
• Premature electrode wear leading to inconsistent spark delivery

Installation Notes and Tips

Before installation, verify the spark plug gap is set to 1.3 mm as specified. Use a torque wrench to tighten the spark plug to the manufacturer’s recommended torque to avoid damage to the threads or improper sealing. The 20.6 mm hex size allows for standard spark plug socket use. Inspect the spark plug threads and cylinder head for debris or damage prior to installation. Replacement intervals should follow vehicle manufacturer guidelines to maintain optimal engine performance.

Quality Assurance and Warranty

Denso spark plugs, including the Double Platinum 3239, are manufactured to meet strict quality standards for durability and performance. The use of platinum electrodes and copper core materials ensures long service life and reliable ignition. While specific warranty details may vary, Denso products typically come with manufacturer-backed warranties covering defects in materials and workmanship.