What type of tool is used to measure valve clearance?

The most suitable tool for measuring valve clearance is a feeler gauge. This tool consists of a flat piece of metal or plastic that comes in various thicknesses, allowing it to fit into the gap between components. In the context of measuring valve clearance, the feeler gauge is inserted between the valve stem and the rocker arm or bucket to determine the space or gap. By using a feeler gauge, mechanics can ensure that the clearance meets the specifications set by the engine manufacturer, which is crucial for optimal engine performance, preventing issues like valve float or excessive wear.

Other tools, such as a torque wrench, are used for tightening bolts to a specific torque, a screwdriver is for driving screws, and a multimeter is used for electrical measurements. These tools serve different purposes and are not designed to measure physical gaps or clearances like the feeler gauge does.