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www.reference.com/article/spark-plug-porcelain-break-glass-1cef09016e3d3e5e

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 sometimes referred to as ninja rocks because of their...

www.reference.com/article/break-window-spark-plug-bf6745278a448dab

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.

www.reference.com/article/spark-plugs-cd172038b0fa5110

A spark plug is a device that produces an electrical spark, which ignites the mixture of fuel and air in the engine's combustion chambers. A spark plug initiates the combustion in the internal combustion engine.

www.reference.com/article/clean-spark-plugs-b752fee21b12d875

To clean spark plugs, disconnect the cables, remove the spark plugs, scrub them with sandpaper and a wire brush, wipe them with solvent, reinsert them, and reattach the cables. This 45-minute process requires work gloves, a bench vise, sandpaper, a brush, a ratchet wren...

www.reference.com/article/install-spark-plugs-b121be0f50ccf73b

To install a spark plug, remove the wire from the existing spark plug, and remove the plug with a spark plug socket. You need a spark plug socket with an extension, electrical or masking tape, and torque wrenches.

www.reference.com/article/change-spark-plugs-a4ae10a8f55f316f

There are several steps to changing spark plugs, beginning with making sure the engine is completely cool. Next, remove one spark plug wire by gently lifting straight up from the spark plug. It is important to change one plug at a time to avoid mixing up the spark plug ...

www.reference.com/article/remove-broken-spark-plug-ea63cfa3a1502d2a

Depending on which part of a spark plug is broken, the process of removing it from a cylinder varies. If the insulator is broken but the threads and nut remain, you can usually remove the spark plug using a 5/8-inch socket with 8-inch extension. If the nut has broken of...