A Solid Valve Lifter (aka mechanical) is exactly what the name implies. They are solid pieces of metal, between the cam lobe and pushrod. This type of valvetrain needs gaps between components, to allow for thermal expansion. These gaps are known as lash.
Engine Top End
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 […]