The inspection method is commonly used in vehicle maintenance work. Most parts of a car can be inspected by this method.

(1) inspect parts by visual inspection. For parts with similar surface damage, such as rough surface, obvious cracks in grooves, scratches, peeling, breakage and other damage, as well as major deformation of parts, severe wear, surface annealing or ablation, lemon rubber parts and other material deterioration or other phenomena, can be checked and determined whether repair or replacement is required by the way of eye-watching hand mold.

(2) inspect parts with percussion. Whether there are cracks in the upper part of the automobile shell and disc-shaped parts, whether the parts connected by rivets are loose or not, the hammer can be tapped to check the parts tested by tapping sound method. If the metal tapping sound is clear, the technical condition is good; if hoarseness is emitted, the parts inspected can be judged to have cracks, looseness or tightness. It needs to be repaired or replaced.

(3) test parts in a comparative way. The technical status of the inspected part is identified by comparing the new standard part with the inspected part. In this way, the free length and the length of the spring, the quality of the rolling bearing can be checked.