Cause analysis of front oil seal falling off of Yunnei engine

Non-petroleum-based lubricants are not used. During the audit test of the whole vehicle and the engine, the front oil seal of the crankshaft leaked oil many times. The reason why the front oil seal of the engine in the cloud falls off is that the bearing is excessively worn or deformed, and no non-petroleum lubricant is used. The engine is an electronic device that controls the operation of various parts of the internal combustion engine.