Denso 3141 Spark Plug

Overview of Denso Double Platinum Spark Plug 3141

The Denso Double Platinum Spark Plug 3141 is engineered for reliable ignition performance in select Dodge, Mitsubishi, and Porsche vehicles. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and consistent engine operation.

• Double platinum chip ground electrode tip for enhanced durability
• Standard ground configuration with a single ground electrode
• Nickel ground electrode core and platinum center electrode tip
• Copper center electrode core for optimal conductivity
• Pre-gap size of 1.1 mm and flat seat type
• Thread diameter of 14.00 mm and reach of 19.00 mm
• Hex size of 16.0 mm for installation
• Manufacturer heat range rating of 20
• Resistance of 5000 ohms to reduce electrical noise

Details on the Double Platinum Product Line

The Double Platinum line from Denso features spark plugs with platinum on both the center and ground electrodes. This dual platinum design improves wear resistance and extends service life compared to conventional spark plugs. The 3141 part number benefits from this technology, providing stable ignition and consistent performance in vehicles such as the Porsche 911, Mitsubishi 3000GT, and Dodge Stealth.

Technical Description and Specifications

The Denso 3141 spark plug incorporates a copper core center electrode with a platinum tip, which enhances thermal conductivity and ignition efficiency. The ground electrode uses a nickel core with a double platinum chip tip, designed to resist electrode wear and maintain a precise spark gap over time. The pre-gap size of 1.1 mm and flat seat ensure proper sealing and spark delivery. With a thread diameter of 14.00 mm and a reach of 19.00 mm, this spark plug fits specific engine designs in Dodge, Mitsubishi, and Porsche models. The resistance rating of 5000 ohms helps minimize electromagnetic interference with vehicle electronics.

Compatible Vehicles and Common Applications

• Compatible with Dodge Stealth and Diamante models
• Fits Mitsubishi 3000GT, Montero, and Montero Sport vehicles
• Suitable for Porsche 911 engines requiring a 14 mm thread spark plug
• Addresses ignition misfires and rough idling in these models
• Helps maintain fuel efficiency and smooth acceleration

Installation Notes and Tips

• Use a 16 mm socket wrench for proper installation torque
• Verify the pre-gap size of 1.1 mm before installation
• Ensure the flat seat type matches the engine’s cylinder head design
• Apply anti-seize compound sparingly on threads if recommended by the vehicle manufacturer
• Replace spark plugs at intervals specified in the vehicle’s maintenance schedule

Quality Assurance and Warranty

Denso spark plugs, including the Double Platinum 3141, are manufactured to meet strict quality standards. The materials and construction are designed to provide consistent performance and durability. While specific warranty details may vary, Denso products typically come with manufacturer-backed quality assurance to support reliable operation in compatible Dodge, Mitsubishi, and Porsche vehicles.