在发动机保养、大修后,常常看到一些机手取下气门室盖,由气门室向发动机内加机油,这种方法不好。机油由气门室加入后,大部分沿着推杆、缸盖油道等流入油底壳,还有相当一部分机油通过气门 In the engine maintenance, overhaul, often see some of the hands remove the valve cover, the engine room by the valve room to add oil, this method is not good. After the oil is joined by the valve chamber, most of the oil flows into the oil sump along the push rod, cylinder head oil passage, etc., and a considerable portion of the oil passes through the valve