Final answer:
The dial indicator is used to measure bearing alignment on an OHC engine with removable bearing caps.
Step-by-step explanation:
In an OHC (Overhead Cam) engine with removable bearing caps, the dial indicator is used to measure bearing alignment.
A dial indicator is a precision measurement tool that can detect minute variations in the alignment of engine components. It consists of a small plunger that moves when pressure is applied and a gauge that shows the measurement in thousandths of an inch or millimeters.
By placing the dial indicator on the bearing cap and rotating the crankshaft, the technician can determine if the bearing alignment is within the acceptable range, ensuring smooth operation of the engine.