Coil-on-Plug systems are designed to distribute the ignition spark more efficiently to the fuel in the combustion chamber. Coil-on-Plug delivers between 30 and 60 thousand volts directly to the spark plug thousands of times per minute. The connection between coil and spark plug is made through the Coil-on-Plug boot. Standard Coil-on-Plug boots are made up of a flexible, heat resistant outer cover over a conductive spring that delivers the spark from coil to spark plug.
Engine environment, heat, water contamination, fuel and lubricant contamination and abrasion damage can all shorten the life of Coil-on-Plug boots significantly and may require replacement to keep an engine running efficiently. Standard coil-on-plug boots are manufactured from the best materials for top performance and endurance – so next time you replace the engine’s spark plugs, replace the coil-on-Plug boots with Standard.
This video demonstrates replacing the Coil-on-Plug Boot for a 3.5 Liter application.