What would be used to measure the clearance between the main bearings and crankshaft?

Question

Quizplus · Accepted Answer

Plastigage is the best choice to measure the clearance between the main bearings and crankshaft. Plastigage is a thin, thread-like plastic that is placed between the bearing and crankshaft journal. When the bearing cap is torqued down, the Plastigage is flattened and the width of the flattened material is measured with a scale provided on the Plastigage package. This measurement gives an accurate reading of the clearance distance. Dial calipers, aligning bars, and feeler gauges can all be useful for other types of measurements, but Plastigage is specifically designed for measuring clearance.

What Would Be Used to Measure the Clearance Between the Main