What are the disadvantages of camshaft cover?

Serious wear and tear, easy to leak oil.

1, seriously worn. The disadvantage of the camshaft cover is that the gap is large after wear, the rotating circumference of the camshaft is oval, and the valve it drives is also large, so the engine timing will be inaccurate and the engine cannot exhaust normally.

2, easy to leak oil. Camshaft cover plays a role in protecting the camshaft, but loose sealing will cause oil leakage at the edge of the cover.