In order to break a car window's tempered glass, the porcelain insulator inside of a spark plug can be used. Unglazed porcelain is rated 7 on the Mohs scale of mineral harness, while glass is rated 5.5. More »

A gap gauge is used to ensure the proper gap size when installing new spark plugs in a vehicle; to find the proper gap size, refer to the vehicle's manual or the specification decal found under the hood. If the gap size ... More »

There are a variety of problems that crop up when spark plugs need to be replaced. Some of the symptoms include difficulty starting, lack of acceleration, rough idle and increased fuel consumption. In general, spark plug... More »

Tiny shards of spark plug porcelain have small hard points which allow them to easily find a breaking point in glass. They can also be used to break the side window of vehicles. Spark plug porcelain fragments are sometim... More »

To replace a car window, unplug the battery, remove the power switch, trim panel and weather strip, unbolt the window, remove the glass, and install the new window. A socket set, screwdrivers and a trim stick are necessa... More » Vehicles Car Parts & Maintenance

In order to test the spark, pull the spark plug from the engine, and then start the car. There should be a bright blue spark between the electrodes every time the cylinder fires, provided that there is enough voltage rea... More »

A spark plug wire diagram shows both the location of an engine's spark plugs and the order in which they fire. There is no universal spark plug wire diagram, as every vehicle has its own distinct spark plug firing order ... More »