Aftermarket Engine Valve Adjustment Shim

This engine valve adjustment shim (also called a valve lash shim, valve adjuster shim or valve clearance shim) is a precision-ground disc used to set the correct valve clearance in engines with shim-under-bucket valve trains. Choosing the right shim thickness restores the specified gap between the cam lobe and valve stem, which helps the engine run smoothly and efficiently.

Key Features:

• Precision-machined flat surfaces for consistent, accurate valve clearance
• Hardened construction designed to resist wear under repeated cam contact
• Available in a range of thicknesses so the clearance can be matched to the engine's specification
• Direct replacement for worn or incorrect shims during a valve clearance adjustment

Correct valve lash helps maintain steady idle, good throttle response and reliable starting, and it helps prevent premature valve train wear. Select the shim thickness that matches your measured clearance and your engine manufacturer's service manual.