Why ticking happens: Ticking occurs when a lifter cannot maintain zero lash due to wear, sludge, or poor oil flow, creating a rhythmic tap that follows engine RPM. High‑risk engines: Engines like ...

There are a myriad of components that make engines tick. By which we mean "tick" in the sense of the sound, not what makes them angry. Fuel injectors make a ticking noise as they quickly squirt ...