Denso 3014 Spark Plug

Denso 3014 U-Groove Spark Plug

Denso 3014 is a conventional spark plug built around a U-Groove ground electrode design for improved ignitability and more consistent combustion. It is a direct-fit ignition service part for a wide range of Chrysler, Dodge, Plymouth, Cadillac, Nissan, and Pontiac applications, including Chrysler Town & Country, Dodge Caravan, and Plymouth Voyager models.

Key Features

• U-Groove ground electrode tip design for stronger spark exposure
• 5000 ohm resistor for noise suppression in secondary ignition systems
• Copper center electrode core for efficient heat transfer
• Nickel center and ground electrode tip materials for conventional durability
• 1.1 pre-gap size for OE-style ignition setup
• Flat seat, 14 mm thread diameter, 19.00 reach, and 20.6 hex size
• Manufacturer heat range 14

Product Details

The Denso U-Groove Conventional line focuses on dependable ignition performance in a standard spark plug format. The U-shaped ground electrode helps expose the spark kernel more effectively, which supports cleaner firing and steadier engine operation. Denso 3014 is a practical OE-style replacement for vehicles that call for this plug specification, including 1990-1995 Chrysler Town & Country, 1990-1995 Dodge Caravan, 1990-1994 Dodge Grand Caravan, 1991-1995 Plymouth Voyager, and 1998-1999 Plymouth Voyager. This part cross-references DENSO Auto Parts W14EXR-U11 for the same application.

What It Helps Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from weak or inconsistent ignition firing
• Misfire conditions related to degraded secondary ignition components
• Reduced fuel efficiency from incomplete combustion
• Loss of throttle response in aging ignition systems

Installation Notes

Verify thread diameter, reach, seat type, and heat range against the original specification before installation. Denso 3014 is a 14 mm, flat-seat spark plug with a 19.00 reach and 1.1 pre-gap size, so it should be matched to the engine’s required plug design. Use proper spark plug service procedures, including checking gap and tightening to the vehicle manufacturer’s specification.

Quality Assurance

Denso’s U-Groove Conventional spark plug line is engineered as a conventional ignition service part with OE-style dimensions and materials. The design and construction support consistent spark delivery across the listed applications, including Chrysler Concorde, Chrysler Imperial, Chrysler New Yorker, Cadillac DeVille, Cadillac Fleetwood, and Nissan Pulsar NX. Part number 3014 is also referenced by Datsun/Nissan 22401-P8314.