You searched for: “adjusting shim
adjusting shim (s) (noun), adjusting shims (pl)
Thin washers or plates that reduce or increase the clearance between two components; depending on where they are placed.

While some valves are adjusted by screws on the rocker arm, others are set by inserting a shim to make the same adjustment.

This entry is located in the following unit: junct-, jug-, join- (page 1)