Dorman 42000 Spark Plug Non-Fouler

Dorman 42000 Spark Plug Non-Fouler

Dorman 42000 is a steel spark plug non-fouler built for specified vehicles that use a 14 mm tapered, gasket-seat spark plug. It helps isolate the spark plug from direct exposure in the combustion chamber area, supporting cleaner plug operation and reducing the chance of fouling-related damage.

For classic GM, Chrysler, Dodge, Pontiac, Cadillac, Oldsmobile, Buick, Chevrolet, GMC, Jeep, and Toyota applications, this Dorman 42000 part is a direct-fit service component for many 1942-1984 vehicles. It is a practical choice when you need a spark plug non fouler for older engines with a 3/8 in. reach and 14 mm thread size.

Key Features

• Steel construction for durability and dependable service
• Silver finish
• 14 mm spark plug thread size
• Tapered spark plug seat style
• Designed for specified 3/8 in. reach, 14 mm gasket-seat applications
• Matches Dorman part number 42000 for easy identification

Detailed Description

This spark plug non-fouler is engineered for vehicles that require a 14 mm gasket-seat spark plug with a 3/8 in. reach. It is commonly used on older performance, passenger, and truck applications, including Chevrolet Bel Air, Pontiac GTO, and Dodge Charger fitments listed in the catalog data. If you are servicing a classic engine and need a Dorman 42000 spark plug non fouler, this part provides a straightforward replacement option.

This part cross-references 420003 for the same application.

What It Is Used For

• Reducing spark plug fouling in specified older engines
• Replacing a damaged or worn spark plug non-fouler
• Restoring proper spark plug spacing in listed applications
• Servicing classic Chevrolet, Pontiac, Buick, Oldsmobile, and Chrysler vehicles
• Supporting maintenance on 14 mm gasket-seat ignition setups

Installation Notes and Tips

Verify the spark plug thread size, seat style, and reach before installation. This Dorman 42000 part is listed for 14 mm gasket-seat applications with 3/8 in. reach, so confirm the engine specification against the vehicle fitment data before service. Use standard ignition service practices and inspect the spark plug condition during installation.

Compatible With many 1942-1984 Buick LeSabre, Oldsmobile Cutlass, Pontiac Firebird, Chevrolet Corvette, and Chrysler Newport applications listed in the fitment data.

Quality Assurance

Dorman manufactures this spark plug non-fouler for durability and reliable performance in specified applications. The part is built as a service replacement for the listed fitments and is identified by part number 42000.