1. There is no need to disassemble the engine to replace the crankshaft oil seal, because the engine and the crankshaft oil seal are not on the same plane. You only need to replace the crankshaft oil seal separately, but you must close the lid tightly.

2. Hello, you can also change the cylinder head by removing it, but it is not convenient in the car. If the engine is easy to remove, remove it and get it.The crankshaft oil seal leaks oil. You don't need to change the engine to remove it. Hello, if the front oil seal of the crankshaft leaks oil, then you have to remove the belt disc. It's a bit troublesome.

3. No need to lift the engine.The reason why the front oil seal of the crankshaft is called the front oil seal is because it is at the front end of the engine. When disassembling and assembling, you generally only need to remove the crankshaft pulley and replace it.Because the rear oil seal of the crankshaft is located in the combined surface of the engine and gearbox, it is necessary to lift the engine.

4. There is no need to remove the engine from the car to change the crankshaft oil seal, but the relevant parts on the left or right side need to be removed, such as the belt, puli bead, starting gear and other parts on the left side, or the fan, magneto and other parts on the right side, depending on the model, the parts that need to be removed for different cars are not the same.