2016 Mercedes-Benz AMG GT S Used Cars in Charlotte, NC 28212. Avg. Dealer Rating: (5 reviews) They have been so great, answered all of my questions and very patient with me when I wasn't immediately responsive due to illness. They worked everything out for an out-of-state sale.
By examining the spark plugâs insulator color, even a less-than-mechanically-inclined person can determine valuable information about the engineâs overall operating condition. Normal: Grey to Light Golden-Brown Color. This condition is ideal, the spark plug and engine air/fuel mixture are operating properly.
â¢ To install your new spark plug, first secure it in your spark plug socket. Plugs must be started by hand to ensure you do not strip the soft aluminum threads of the cylinder head. Spark plugs should thread smoothly and you should be able to thread them completely without the use of a socket wrench.