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 ...

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 ...

If you're like us, you've done a lot of thinking lately about the different shapes and lengths of spark plug tips. But odds are that you're nothing like us (good for you), and you've given absolutely ...

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 ...

My question is about spark plug reach. I recently removed my intake, and while looking at one valve that was near max lift, I could see the electrode was at least 1/8 inch in the threaded hole. I ...