Spark plugs that haven't been changed for a long time can become one with the cylinder head. Fortunately, it's possible to repair damaged threads instead of scrapping the head. (Photograph by Chris ...

It doesn't matter what type of vehicle you drive or which type of spark plug you're using. If your car has an internal combustion gasoline engine, it has the potential to eject a spark plug — although ...

Like rotating tires or changing oil, replacing spark plugs is a job that can be easily, and inexpensively, done in the confines of your own home. Although they don’t need maintenance as often as the ...