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 ...

Damaged or neglected spark plug threads can turn a quick tune-up into a costly engine repair. From misfires to stripped threads, prevention and proper repair techniques are key to keeping your car ...

A healthy ignition system is key to a car's overall efficiency and power output. If any of the components that have a hand in lighting off the air/fuel ratio are damaged or worn out, it could mean a ...

Few things disturb us more than the bewilderment of a broken bolt or seized pipe plug in a casting. You’re at a loss for how to get the darned thing out. This is when you have to slow down and come up ...

We’ve all had this happen at some point while tightening hardware: It feels like it’s snugging up nicely, and then it suddenly seems to tun too easily. Or maybe you were removing stubborn hardware and ...

Add Yahoo as a preferred source to see more of our stories on Google. But spark plugs live in harsh environments. Not only do they see massive changes in temperature, but schmutz tends to accumulate ...