Iridium Ultra®

Autolite Iridium Ultra® Spark Plugs

When looking for a spark plug replacement to optimize the performance for the most technologically advanced engines, you need the most technologically advanced spark plug. The Autolite Iridium Ultra Spark Plug utilizes a finewire iridium centerwire tip design with laser-welded technology for optimal performance, durability*, ignitability** and fuel efficiency. These iridium spark plugs are now available with a lifetime limited warranty.

*Compared to 0.8 mm finewire, multi-electrode design and standard spark plugs.
**Compared to average of other premium brands.

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FEATURES & BENEFITS

Includes an ultra finewire iridium centerwire tip design with laser-welded technology providing a focused ignition for optimal ignitability and maximum performance
Optimal fuel efficiency, acceleration and focused ignitability provided by a finewire center electrode*
Provides durability for more than 100,000 miles
Laser-welded iridium finewire center electrode tip with proprietary iridium alloy

*Versus standard copper core spark plugs

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

High alumina multi-rib ceramic insulator prevents flash-over
Nickel-plated shell
Tapered ground electrode for enhanced ignitability
Finewire laser-welded centerwire provides focused ignition for improved acceleration and optimal fuel efficiency
Iridium-enhanced platinum alloy pad limits gap erosion for 100K mile service life

PARTS

Autolite spark plugs provide OE-equivalent quality and performance to over 95% vehicle applications. Available now at participating Advance Auto Parts locations and online at advanceautoparts.com.