Aftermarket Valve Adjusting Shim

Aftermarket Valve Adjusting Shims are precision-ground valve adjusting shims, also called valve shims or valve lash adjusting shims. They set the correct valve clearance (valve lash) in engines that use shim-under-bucket valve trains. Choosing the right shim thickness restores the specified clearance between the cam lobe and the valve stem. This helps the engine run smoothly and keep consistent valve timing.

Key Features:

• Hardened, flat-ground steel construction designed to resist wear under repeated valve train loading
• Precise thickness control so valve clearance can be adjusted accurately
• Available in multiple thicknesses, so you can choose the one that matches your measured valve clearance
• Simple drop-in replacement for worn or out-of-spec shims during a valve clearance adjustment

Correct valve lash helps support steady idle, strong power delivery, good starting, and longer valve train life. Measure the clearance with feeler gauges before and after installation. Then choose the shim thickness that brings the clearance within the engine manufacturer's specification.