Which measurement tool is best for checking the spacing between two components?

The best tool for checking the spacing between two components is the feeler gauge. This tool is specifically designed to measure gaps and clearances, making it ideal for tasks that require precise spacing measurements. Feeler gauges consist of a set of thin, flat strips of metal with known thicknesses, which can be inserted between components to check the size of the gap.

This ability to accurately measure small distances is crucial in applications like engine assembly or valve adjustments, where proper spacing directly affects performance and function. By using a feeler gauge, a technician can determine whether the spacing meets specified tolerances, ensuring that components are working together correctly.

Other tools listed serve different purposes. Plasti-gauge is typically used to measure oil clearance in engines. A depth gauge is designed for measuring the depth of holes or slots, and a telescoping gauge is used to measure the internal dimensions of holes, not the spaces between components. Each of these tools has its specific applications, but for simply measuring spacing, the feeler gauge is the most suitable and effective choice.