How To: Change the spark plugs on a 4.7L V8 Jeep engine

A spark plug is a device that fits into the cylinder head of an engine and ignites compressed fuel with an electrical spark. This video tutorial demonstrates how to change the spark plugs on a 4.7L V8 Jeep engine. When changing spark plugs, wait until the engine has cooled down to reduce the risk of thread damage, and use proper tools and safety precautions to insure a successful outcome.