1. The connecting rod body, bearing cover, etc. shall not have cracks or damage.

2. The bearing cap and the bearing seat should be tightly closed, the joint surface is not damaged, and the positioning groove is intact:

3. Use a feeler gauge to check the gap between the end faces of the big end of the connecting rod and the crank arm. The size should meet the requirements, otherwise it should be replaced.

4. Check the connecting rod bolts and nuts. If the thread has more than two teeth, the bolt has cracks or obvious defects, and the bolt is elongated and deformed; or the bolt and nut have too large clearance and are obviously loose, and should be replaced.