1. Observe the exhaust pipe: pay attention to whether the exhaust pipe has abnormal sound or discoloration. When the supercharger blade enters the engine, it will cause abnormal thick black smoke in the exhaust pipe.
2. Check the air inlet: Open the engine cover and check the air inlet for visible foreign objects. Use a flashlight and a mirror to better observe the inside of the air inlet.
3. Check the cylinder pressure gauge: use the cylinder pressure gauge to test whether the pressure of each cylinder is normal. The abnormal low pressure of a cylinder is due to the damage of the blade of the supercharger entering the cylinder.
4. Carry out compression test: Compression test can be carried out to evaluate the health of the engine. This will help to determine whether there is abnormal cylinder pressure or other problems. Through the above method, it can be preliminarily judged whether the blades of the supercharger have entered the engine.