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 ...

When it comes time for your regular tune-up, you may be surprised to find oil on the spark plugs. This contamination often reveals a mechanical problem, but how do you know what’s wrong? In this guide ...

It is important to examine your spark plugs during vehicle maintenance. And because spark plugs are relatively inexpensive, you may choose to replace your spark plugs often. But at the least, ...

Extend the life of your spark plugs with these simple methods. The purpose of a spark plug is to supply spark to the combustion chamber to ignite the fuel/air mixture from the intake manifold. It is ...

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 ...