Spark Plug Ceramic Breaks Window

Sit a spark plug down.

Spark plug ceramic breaks window. Although effective spark plug fragments will not work all the time. It is extremely tough and my suspicion is that the. This is a myth. Mike1942f you dont understand.

An article on the american ceramic society s website explains the hard ceramic fragments of broken spark plugs are great at breaking tempered glass. The impact of the shard against the glass creates a tiny structural failing which rapidly spreads the tension through the rest of the screen causing it to break. You can throw a small piece of porcelain at a perfectly good car window and it will literally shatter. Ninja rocks are broken shards of spark plugs that are formed by smashing the ceramic portion of the spark plug with a hammer or other large object.

It has something to do with the crystallinity of porcelain. Several people have suggested that the charge of the glass and the ceramic from the spark plug create a spark that breaks the glass in an explosive way. When done right the spark plug shutters the glass immediately and since the tempered glass is designed to break with little noise not much noise is produced. Posted by vidiot at 7 03 am on november 30 2004.

I wouldn t say breaking the car window with a plug is quiet. These broken pieces are what you get when you smash the ceramic part of the spark plug. The ceramic could leave a scratch but that is all that would happen. The only charge of any significance here is the one you ll pay to replace your window.

Porcelain is made through a process of heating cooling and reheating ordinary glass which produces properties of both glass and ceramic materials. Since they can quickly and quietly fracture the glass side windows on most cars ninja rocks have been used in smash and grab auto burglaries since at least 1995. As the article you linked to mentions spark plugs are made out of fairly hard material and if broken spark plug insulators the ceramic part are used to break into a car their jagged sharp edges may be a factor as well. The ceramic is the insulator.

The metal on the top and the metal of the hex is what touches. While i have seen other people using the whole plug you only need the spark plug insulator the ceramic part. Or the metal threads. Spark plugs are made of aluminum oxide ceramic which is exceptionally hard.

Or the metal arm that sticks up over that arcs the spark.