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 ...

How often you replace spark plugs depends on the type of plugs you have. You may have 30,000-mile plugs, or if the plugs have platinum tips, they may be good for up to 100,000 miles, although some ...

Before you undertake any of this work, make absolutely sure that you won't damage your car by attempting to fix the spark-plugs. Follow these steps to remove each spark plug: 1. Gently grasp a spark ...

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 ...