How to repair the oil leakage at the top of engine side of Jinbei starfish a9?

The maintenance method of oil leakage on the side roof of Jinbei starfish a9 engine is as follows:

1, the engine timing cover pad is aging, and there will be oil stains on the side of the engine from top to bottom, so the timing cover pad is needed.

2. There is oil leakage at the valve cover pad, and the engine has oil stains from top to bottom, so the valve cover pad is needed.

3. The crankshaft rear oil seal leaks oil. If dripping oil is seen at the joint between the transmission and the engine, a crankshaft rear oil seal is required.