What Is Spark Plug Indexing?

What Is Spark Plug Indexing?

Spark plug indexing is the orientation or placement of the ground electrode at a specified direction in the combustion chamber.

Spark plugs have been around since the first internal combustion engine, and they’re still with us today. Without this simple but necessary component, there is no fire.

Most of us just take the new spark plug out of the box, gap it and install it in the old plug location and then tighten to factory torque specifications. But, there are some applications in which you need to index the plug.

Spark plug indexing is the orientation or placement of the ground electrode at a specified direction in the combustion chamber. An engine manufacturer or builder might specify a ground-electrode orientation for several reasons, including performance, efficiency, clearance or fouling prevention.

This video is sponsored by The Pronto Network.

You May Also Like

Introduction to Keyless Ignition Systems

This technology allows drivers to start their vehicles without the traditional key turn.

Keyless Ignition

Keyless ignition systems, commonly referred to as keyless start or push-button start systems, have become a standard feature in many modern vehicles.  

This technology allows drivers to start their vehicles without the traditional key turn. Instead, a button press activates the ignition.  

The system operates via a combination of wireless transmitters and sensors. The key fob, equipped with a unique digital identity, communicates with the vehicle's onboard computer system, signaling its proximity and permitting vehicle access and operation.

Litens Pulleys: You’ll Be Surprised at What’s in the Box

The pulley kit saves time for your customers and takes up less space on the shelf.

Litens tensioners pulleys
Selling Wheel Bearings and Hub Units to DIFM Customers

Using premium wheel bearings means fewer customer comebacks.

Wheel Bearings
Overview of the Clutch System

There are three main components involved: the flywheel, friction disc and pressure plate.

Clutch System
Understanding the Basics of Brake Calipers

There are two main types of brake calipers: floating calipers and fixed calipers.

Brake Calipers

Other Posts

Free Webinar Will Ignite Your Spark Plug Knowledge

The Feb. 27 webinar will cover spark plug nomenclature, electrode design, high-ignitability spark plugs, new spark plugs designs and more.

NGK Webinar
Fundamentals of EV Technology

Electric vehicles offer numerous advantages over traditional gasoline-powered vehicles.

Fundamentals of EV Technology
High-Pressure Fuel Pumps in GDI Systems

High-pressure fuel pumps are precision-machined to generate fuel pressure to the rail up to 2,500 psi.

High Pressure Fuel Pumps
Why Do Thieves Covet Catalytic Converters?

Once a hated piece of emissions equipment, this is now a very sought-after part.

Catalytic Converters