The engine makes a loud noise after the car is ignited.

1. If the sound of the automobile engine comes from the exhaust pipe, it is probably caused by the rupture of the exhaust pipe. Just replace it.

2. When the engine is running at high speed, it makes a harsh sound, which may be caused by aging spark plugs or dirt blockage. Just replace it.

3. If the engine sound is low, it may be that the oil quantity is used up, so you can fill it up in time.

4. If the sound of the engine changes with the change of the maximum power speed, it is possible that the bearing of the engine is damaged and can be replaced.

5. If the engine makes the sound of metal collision, it may be that there is something wrong with the engine cylinder valve and professional maintenance personnel are needed for maintenance.

6. If the sound is similar to the roar of explosion, please check whether the engine muffler is damaged and replace it.

Engine compartment cleaning

1, open the hood, and then cover the distributor, battery and brake oil pot with plastic sheets.

2. Turn on the water gun to spray and clean the engine compartment, and rinse off the dust and dirt on the engine. Be careful not to rush directly into the engine with a water gun at this time.

3. Clean the air guide under the front windshield with a water gun.

4. Dip the flannel in water to clean the dust, leaves and other sundries on the water tank, radiator and air conditioner condenser. Pay attention to the inside out when cleaning.

5. Carefully clean the supporting rod in the engine compartment and the dirt on the supporting rod with a water gun.

6. Use an air gun or air blowing to remove dust particles from the spark plug in the engine compartment. Finally, dry all the parts.