A Mechanical Valve Lifter (aka solid) are exactly what the name implies. They are solid pieces of metal, between the cam lobe and pushrod. This type of valve-train needs gaps between components, to allow for thermal expansion. These gaps are known as lash.
Valve Train Noise – Where Is It Coming From ? – Is It Bad ?
Valve train noise, is usually due to excessive clearance, between two internal engine parts. Each valve utilizes, a valve spring that returns it to its, original closed position. So, if a valve spring has broken […]