A STUDY of the influence of vibration on valve-springs reveals two possible ways in which a valve-spring can vibrate: First, when the frequency of the forced vibration is low, the force tending to ...

Back in March, The Drive broke the story about dozens of 2013 Scion FR-S and Subaru BRZ owners who reported experiencing catastrophic engine failure shortly after a valve spring recall repair largely ...

If you've ever wondered what happens to NASCAR engines after they blow up on the track, it's your lucky day. Here is the seriously nerdy failure analysis that goes into making sure those engines don't ...

For mild street engines, stock valve springs are more than adequate. But if you've screwed in a big bumpstick for strip-banging or banzai runnin', then pay attention. Our plan was simple: Install a ...

If you could single out one particular part of an engine that is most misunderstood, you would likely mention the camshaft. The numbers associated with camshaft design have baffled many a car guy for ...