How to measure the clearance of engine big tile?

Measurement method of engine large tile clearance: 1. Using vernier caliper to measure, but the measurement is complicated, so it is difficult to accurately measure the gap between crankshaft and pad. 2. Using the linear plastic gauge for the clearance between large and small tiles of automobile crankshaft, the clearance between large and small tiles and the taper of crankshaft can be measured quickly, intuitively and accurately; 3. With an outside micrometer and a cylindrical gauge, their clearance can be measured; 4. Assemble the bearing bush, crankshaft and tile cover, and then turn the crankshaft. As long as the crankshaft can rotate smoothly, it can basically be said that the fit clearance is very good. If you can't turn a few laps smoothly, it proves that the gap is too big or too small; 5. At present, all automobile engine factories have supporting tables for bearing bush assembly. If you want to get the data, you have to find a professional test.