What does a dial indicator measure in engine components?

A dial indicator is a precision measuring tool commonly used in engine maintenance and repair to measure clearances and protrusions in engine components. It provides a visual reading that allows technicians to detect small variations or deviations in dimensions. This capability is essential during various processes, such as checking the alignment of parts, measuring the gap between components, or ensuring that valve stems and pistons are positioned correctly in relation to one another.

The precision offered by a dial indicator helps technicians ensure that engine components meet specific tolerances required for optimal performance and to prevent premature wear or failure. Such measurements are crucial in various applications, including setting valve lash, measuring crankshaft end play, and checking piston ring protrusion. This tool ensures that all necessary components function harmoniously within the specified limits, highlighting its significance in engine diagnostics and repairs.