The valve shim is a mechanism that is utilized to adjust the height of mounted valve springs in an internal combustion engine.
Valve spring shim principleThe valve shim is also utilized to adjust the tolerance of a valve on the overhead cam engine. The component is made from steel and it is typically placed under the valve spring or on top of the stem. Many valves and springs need at least one shim the number and width of the valve shim utilized on each valve and spring differ. The valve shim is retained by the force of the valve spring. It is essential to have a valve shim equipped to provide proper engine performance.
Common issues with a faulty valve spring shimA faulty valve spring shim can lead to poor ignition, problems with the exhaust system, and a decline in engine performance.