NGK 2238 Spark Plug

NGK TR5 V-Power Spark Plug

NGK 2238 is a V-Power spark plug built for OE-style ignition performance across a wide range of domestic and import applications. It uses a copper core center electrode, nickel tip materials, and a tapered seat to support consistent combustion and reliable starting in everyday driving.

Key Features

• NGK V-Power spark plug, part number 2238 / TR5
• Copper core center electrode for stable heat transfer
• Nickel center and ground electrode tip materials
• Standard ground electrode design with a single ground electrode
• 5,000 ohm resistor for ignition noise suppression
• Pre-gapped at 0.040 inch
• 14 mm thread diameter, 5/8 inch hex, tapered seat
• Manufacturer heat range 5
• Removable nut terminal for common ignition wire setups

Product Details

The NGK V-Power line focuses on OE-equivalent spark plug construction with a center electrode profile that supports efficient spark exposure and dependable ignition response. NGK 2238 is specified with a 0.040 inch pre-gap, 0.708 inch reach, and tapered seat, making it a direct service part for many vehicles that call for this configuration. This part cross-references Champion Spark Plug 401 and Autolite 104 for the same application.

Fitment coverage includes many Ford Ranger and Ford Taurus applications, along with Chevrolet Silverado 1500, GMC Sierra 1500, and Chevrolet Corvette models. It also appears in service applications for Ford Escape, Ford Fusion, Mercury Mariner, and Mercury Milan, where the listed gap and seat type match the OE requirement.

Common Problems This Part Helps Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from weak or inconsistent spark output
• Misfire conditions tied to excessive electrode wear
• Reduced throttle response from degraded ignition performance
• Maintenance intervals reached on OE-style ignition service

Installation Notes and Tips

Verify the vehicle’s required gap before installation and adjust only when the application notes call for a different setting. Confirm the tapered seat, 14 mm thread diameter, 5/8 inch hex, and 0.708 inch reach match the engine specification before service. For fitment examples, this part fits 2010-2012 Ford Escape, 2011-2012 Ford Fusion, 2010-2011 Mercury Mariner, and 2011 Mercury Milan. It also fits 1999-2008 Chevrolet Silverado 1500, 2000-2008 GMC Yukon, and 1997-2008 Chevrolet Corvette, with application-specific gap notes listed in the fitment data.

Quality Assurance

NGK is a long-established OE supplier and manufacturer with broad coverage across automotive, motorcycle, marine, and small engine ignition applications. The brand’s North American manufacturing and distribution network supports consistent product availability and OE-level service standards.