Why does the winning 2.3l engine rattle?

There are abnormal noises and valves, which are normal. If there is a noise at the co-pilot's place, it may be that the oil pipe is loose, or there is a gap in the place where the oil pipe is put. The solution is to plug it and fill it up. It is also possible that the problem of carbon deposition leads to abnormal noise, and the solution is to clean up the carbon deposition.