Which tool would be required to measure the cam lift of a cylinder block-mounted camshaft in position?

To measure the cam lift of a cylinder block-mounted camshaft while it is in position, a dial indicator is the appropriate tool to use. This tool provides precise measurement of small distances and can easily detect the movement of the camshaft lobes as they rise and fall.

When measuring cam lift, the dial indicator is placed in contact with the highest point of the cam lobe. As the engine is rotated, the dial indicator measures the different heights reached by the lobe, allowing the technician to determine the total lift of the camshaft. This measurement is crucial for ensuring that the cam is functioning within specifications and that engine performance is optimized.

Other tools like an outside micrometer or a depth micrometer are designed for different applications, including measuring external dimensions or depths of holes, respectively, and are not suitable for measuring cam lift. Thickness gauges are used to measure material thickness and would not provide the necessary functionality for measuring camshaft lift in this context.