This video shows how to use Plastigage to check bearing clearances in an engine. Plastigage can be used to check all kinds of clearances, but engine and bearing clearances are among the most common. Remember there are several different kinds of Plastigage, so be sure to pick the right size for your application. Plastigage is not a replacement for precision measurements, but it can be a good quick check that you can used for engine assembly. In addition to using Plastigage, this video also shows how to use a degree wheel when torquing fasteners.