NGK 3142 Spark Plug

NGK G-Power Spark Plug for OE-Style Ignition

NGK G-Power Spark Plug Part Number 3142 is built for drivers who want a direct-replacement spark plug with OE-focused construction and consistent ignition performance. It combines a platinum center electrode tip with a copper core and nickel ground electrode to support reliable spark delivery across a wide range of domestic and import applications.

Compatible With Chrysler Town & Country, Dodge Caravan, and Plymouth Voyager applications, this NGK spark plug is part of the G-Power Spark Plug line, which is positioned for original-equipment-style service and dependable everyday operation.

Key Features

• NGK G-Power Spark Plug Part Number 3142
• Platinum center electrode tip material for stable spark characteristics
• Copper center electrode core for efficient conductivity
• Nickel ground electrode core with standard ground configuration
• 5000 ohm resistance for ignition system noise control
• Flat seat design with 14.00 mm thread diameter and 0.75 in. reach
• Pre-gapped at 0.060 in.; some listed vehicles note a 0.050 in. gap requirement
• 13/16 hex size and non-removable nut terminal

Product Details

The NGK G-Power Spark Plug line is designed around OE standards and broad vehicle coverage, backed by NGK’s long history as a major original-equipment supplier in North America. Part 3142 uses a platinum-tipped center electrode, copper core construction, and a trapezoid ground electrode tip design to support consistent combustion in everyday driving. This spark plug is listed across many Chrysler, Dodge, Plymouth, Pontiac, Buick, Oldsmobile, Cadillac, and related applications, including Chrysler Grand Voyager, Dodge Grand Caravan, and Plymouth Voyager models.

This part cross-references Autolite AP646 for the same application.

What It Helps Address

• Hard starting caused by worn spark plug electrodes
• Rough idle from inconsistent ignition firing
• Misfire conditions related to aged plugs
• Reduced throttle response from weak spark output
• Maintenance replacement for high-mileage ignition service

Installation Notes and Tips

• Verify the vehicle-specific gap before installation; several listed Chrysler, Dodge, and Plymouth applications call for 0.050 in.
• Confirm thread diameter, reach, seat type, and hex size match the engine specification before installation.
• Inspect ignition wires, coils, and related secondary ignition components during service.
• Use proper torque procedures for flat-seat spark plugs to avoid thread or sealing issues.

Quality Assurance

NGK manufactures spark plugs for a wide range of automotive, motorcycle, marine, and small-engine applications, with North American OE supply experience and global production and distribution support. Part 3142 reflects NGK’s OE-oriented approach to durability and operational consistency.