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 ...

We may receive a commission on purchases made from links. DIY car engine maintenance is hardly rocket science, but simple tasks can become unexpectedly difficult and seriously disrupt your routine. It ...

A spark plug thread chaser isn't always the answer, but it can make a big difference when you're installing fresh new plugs.

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 ...