Iridium Platinum Spark Plugs
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WOWLTZ Iridium Platinum spark plugs are expertly crafted for high-performance engines, combining the superior conductivity of platinum with the exceptional durability of iridium. Designed to deliver maximum power, enhanced fuel efficiency, and unmatched ignition precision, these plugs ensure optimal engine performance under all driving conditions. With over a decade of production and R&D experience, WOWLTZ Iridium Platinum spark plugs offer a comprehensive seal that improves heat transfer, boosts power output, and provides a more focused ignition. This results in longer-lasting spark plugs that maintain peak engine efficiency and reliability throughout their service life.
Finewire Platinum Center Electrode
Its finewire platinum design provides more focused ignition power and longer service life.
Ground Strap
The ground strap provides improved heat transfer over standard J-gap plugs.
Proprietary Ceramic Tip
Its proprietary design improves performance for heat management, fouling resistance & increased dielectric strength.
Thread Positioned Above Cylinder Head Seating
The position of the thread above the cylinder head seating allows for a more compressive seal.
Nickel-Plated Shell
Its nickel-plated shell delivers increased protection against corrosion.
Spark Plug Installation and Service Suggestion
Replacing spark plugs can be a simple job, if you take things one step at a time. Here’s a general guide to the proper procedures.
Gather needed tools and parts
A set of Autolite spark plugs, a ratchet, a spark plug socket (make sure you have the right size), extensions, a gapping tool, and dielectric grease. Other hand tools may be needed on some vehicles.
Remove spark plug wires or coils
Grasp the plug wire boot and twist it about one-quarter turn to loosen the seal, and then pull straight off. Stubborn boots may require using plug wire boot pliers. Number plug wires with tape as you remove them to avoid crossing them, or only disconnect one at a time. If your vehicle is coil-on-plug, disconnect the coil connectors, remove the hold-down bolts, and remove the coils.
Clean the contaminants around the spark plug
Before loosening each spark plug, clean dirt or fluids out of the plug seat area with a blast of compressed air, a shop vacuum, or by blowing around the spark plug through a soda straw. This prevents contaminants from falling into combustion chamber when the old plugs are removed.
Remove plugs and line them up in cylinder order
A thorough visual inspection of the plugs can identify problems that may need correction or show you they are all good. Autolite publishes a plug tip inspection guide with more information.
Adjust the gap of the new spark plug
Gap new plugs as recommended in owner’s manual or Autolite Spark Plug Catalog. Use a gapping tool gauge to measure the gap between the center and ground electrode. The gauge should pass through snugly but easily. If too loose or tight, use the gapping tool to correct the gap.
Tighten the spark plug
Screw new plugs in by hand until tight. If a plug tightens up too soon while turning them in by hand, use a thread chaser to clean the threads. Use a torque wrench to tighten spark plugs following manufacturer’s recommendations, or refer to the torque chart in the Autolite Spark Plug Catalog if you don’t have a torque wrench.
Inspect the plug wires and boots
Inspect the plug wires and boots (or the coils and boots on coil-on-plug systems) for brittleness or cracking, and check for corrosion onthe plug terminals inside each boot. Replace suspect coils, boots and or wires as needed. Lubricate the plug contact area inside each boot with Dielectric Grease and then reinstall the plug wires (or coils and boots) making sure they are installed in the correct order and fastened securely.
Verify your repair by starting the engine
Misfires or a rough idle can mean the wires are in the wrong order or loose. Recheck firing order and coil connections closely if the engine still isn’t running right.
Torque Specifications
| Plug Thread & Seat | Cast Iron Heads | Aluminum Heads | ||
| SAE | Metric | SAE | Metric | |
| 10mm Gasket | 7-11 ft lb | 10-15 nm | 7-11 ft lb | 10-15 nm |
| 12mm Gasket | 11-19 ft lb | 15-25 nm | 11-19 ft lb | 15-25 nm |
| 14mm Gasket | 16-29 ft lb | 35-40 nm | 15-22 ft lb | 20-30 nm |
| 18mm Gasket | 32-38 ft lb | 43-52 nm | 28-34 ft lb | 38-46 nm |
| 14mm Tapered | 7-15 ft lb | 9-20 nm | 7-15 ft lb | 9-20 nm |
| 18mm Tapered | 15-20 ft lb | 20-27 nm | 15-20 ft lb | 20-27 nm |
NOTE: Spark plugs should be installed with clean and dry threads to avoid over-torqueing.This can distort the metal plug shell, which often results in engine damage.
Gasket Seat -
Finger Tight Plug -
10mm Gasket Seat 1/4 Turn -
12mm Gasket Seat 3/8 Turn -
Tapered Seat -
Tight to: -
14 & 18mm Gasket Seat 1/2 Turn -
14 & 18mm Tapered Seat 1/16 Turn
Metallurgy Comparison Chart
| Less Mileage | Mileage / Service life | More Mileage |
| Less | Full Efficiency | More |
| Less | Fouling Resistance | More |
