Copper

Autolite® Copper Spark Plugs

Since 1936, Autolite has been a trusted leader and innovator in spark plug technology. You can count on our copper plugs for performance and value, backed by decades of experience and passion. Includes a 2 year limited warranty.*

*See warranty details

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FEATURES & BENEFITS

Guaranteed to deliver quick starts, good fuel economy and smooth acceleration.
Copper core center electrode for higher thermal conductivity
Specially engineered high nickel alloy center and ground electrode for extended life
High alumina ceramic for high dielectric strength
Leak proof, heat fused internal seal for durability
Multi-rib insulator prevents flash-over
2-year limited warranty

Click on the link below to check out our Spark Plug Metallurgy Comparison Chart.

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INSTRUCTIONS

Autolite highly recommends that you consult with your vehicle’s owner’s manual for any specific instructions for changing the spark plugs. Engines can vary widely by make and model. These instructions should be considered for general guidance only.
Replacing spark plugs can be a simple job, if you take things one step at a time. Given a basic understanding of mechanical matters, here's a guide to the proper procedures in changing spark plugs.

Coil-on Plug

Unplug and remove ignition coils. Inspect coil boots for cracking or oil staining. If you have oil in the spark plug wells or on the boots, the valve cover gasket is leaking and must be replaced.
Loosen each spark plug so it can be removed. Clean the seat area with a blast of compressed air or with a shop vac, use proper PPE. This prevents dirt from falling into the combustion chamber when the old plugs are removed.
Remove the plugs and line them up in cylinder order. Inspection of the firing ends of the plugs can identify a number of engine problems that may need correction. (illus. 3)
Check and set the gap on new plugs as recommended in your owner's manual or a Spark Plug Catalog. Use a round feeler gauge to measure the gap between the center and ground electrode. The gauge should pass through snugly but easily. If it's too loose or too tight, reset the gap.
Screw new plugs in by hand until tight. Use a torque wrench to tighten the spark plugs following the manufacturer's recommendations, or refer to a torque chart in the Spark Plug Catalog. If you don't have a torque wrench, see the bottom of the torque chart for hand tightening recommendations.
Replace the coils Before installing the coils, put a small amount of dielectric grease inside the spark plug boot. Check to see if the boots are brittle or cracked, and if there is corrosion on the connector inside the boot. If any of these conditions are present, the spark plug boots should be replaced.
Start the engine. If it misfires or idles roughly, the wires are crossed or not connected to the plugs correctly. Check the firing order and connections closely.

If you have any questions regarding your Autolite spark plugs, call Autolite Answers(SM) to consult with one of our technicians. Autolite Answers 855-200-5200

Distributorless Ignition System (DIS)

Carefully remove the spark plug wires. Grasp the plug wire boot, twist about one-quarter turn to break the seal, then lift straight off. Use plug boot pullers if the boot doesn't break free easily. Number plug wires with tape as you remove them to avoid crossing them. (illus. 1)
Loosen each spark plug so it can be removed. Clean the seat area with a blast of compressed air or with a shop vac, use proper PPE. This prevents dirt from falling into the combustion chamber when the old plugs are removed. (illus. 2)
Remove the plugs and line them up in cylinder order. Inspection of the firing ends of the plugs can identify a number of engine problems that may need correction. (illus. 3)
Check and set the gap on new plugs as recommended in your owner's manual or a Spark Plug Catalog. Use a round feeler gauge to measure the gap between the center and ground electrode. The gauge should pass through snugly but easily. If it's too loose or too tight, reset the gap.
Screw new plugs in by hand until tight. . Use a torque wrench to tighten the spark plugs following the manufacturer's recommendations, or refer to a torque chart in the Spark Plug Catalog. If you don't have a torque wrench, see the bottom of the torque chart for hand tightening recommendations.
Replace spark plug wires in the correct order. Before installing the wires put a small amount of dielectric grease inside the spark plug boot. Check to see if the boots are brittle or cracked, and if there is corrosion on the connector inside the boot. If any of these conditions are present, the spark plug wire should be replaced.
Start the engine. If it misfires or idles roughly, the wires are crossed or not connected to the plugs correctly. Check the firing order and connections closely.

If you have any questions regarding your Autolite spark plugs, call Autolite Answers(SM) to consult with one of our technicians. Autolite Answers 855-200-5200

TECHNOLOGY

Copper-glass seal bonds insulator, terminal post center electrode together; assures full required voltage at spark gap; gas-tight seal (100% leak proof)
Multi-rib insulator reduces danger of "flash-over"
One-piece terminal post adds strength
Resistor reduces radio frequency interference (RFI) and electrode erosion
Cold-formed steel shell precision rolled threads
Full copper core electrode provides better performance in all conditions

PARTS

A quick reference to Copper's part numbers are listed below. Autolite provides OE-equivalent quality and performance to over 95% vehicle applications. If you don't see the part number for your vehicle, don't fret! Our Parts Finder allows quick access to the right part for your engine.

5325
5224
3923
3924
3923

3924
104
5245
606
103

605
25
764
5243
985