Autolite 24 Spark Plug

Autolite 24 Copper Resistor Spark Plug

Autolite 24 is a copper resistor spark plug built for OE-style replacement needs across a wide range of Ford, Chevrolet, GMC, Buick, Pontiac, Cadillac, Jeep, and Isuzu applications. It is designed for quick starts, steady fuel economy, and smooth acceleration, with the form, fit, and function expected from a direct replacement plug.

Key Features

• Copper center electrode core for reliable ignition performance
• Nickel center and ground electrode tip materials
• 5000 ohm resistor design to help reduce electrical noise
• 0.044 in. / 1.10 mm pre-gap size
• Tapered seat with 14 mm thread diameter and 5/8 in. hex
• Ceramic insulator with mid-projection design
• Standard / regular center electrode design for OE-style service

Product Details

The Autolite Copper Resistor Spark Plug, part number 24, is engineered as an OE-style replacement for many domestic and import vehicles. Its copper core supports consistent spark delivery, while the resistor construction helps manage radio-frequency interference in ignition systems. This plug uses a tapered seat, stud terminal, and 0.044 inch gap specification, making it a practical choice for maintenance on older Ford trucks and vans as well as many Chevrolet and GMC light-duty applications.

Autolite’s Copper Spark Plug line focuses on straightforward replacement performance for drivers who want factory-style fitment without unnecessary complexity. For vehicles such as the Ford F-150, Ford Bronco, Chevrolet S10, and GMC Sonoma, Autolite 24 matches common OE-style service requirements and supports dependable everyday drivability. This part number 24 is also referenced in cross applications such as Champion 406 and Dayco 80027 for the same application.

Common Uses

• Hard starting caused by worn or fouled spark plugs
• Rough idle or inconsistent combustion at the plug level
• Reduced throttle response during routine driving
• Ignition noise concerns in resistor-equipped systems
• Maintenance replacement for OE-style tune-up service

Installation Notes

• Verify the required gap before installation; listed pre-gap is 0.044 in. / 1.10 mm.
• Confirm tapered-seat cylinder head compatibility before ordering.
• Check thread diameter, reach, and hex size against the original plug specification.
• Use the vehicle’s service information for torque and final gap verification.
• Fitment includes many 1970-1997 applications; review the exact year, make, and model listing before purchase.

Quality Assurance

Autolite supplies ignition products to the automotive aftermarket and original equipment manufacturers, with a product line focused on OE form, fit, and function. Autolite 24 is built to meet common replacement requirements for a broad range of vehicles, including Ford F-250 HD, Ford F-350, Chevrolet Caprice, and GMC Safari applications.