Dongfeng Honda H model is very loud. What happened?

If the engine is loud during cold start, it will tend to be quiet after one minute, and it will be quiet during hot start, which is normal. Because after parking, the oil will automatically flow back to the oil pan. During the cold start the next day, the oil will slowly flow back from the oil pan to the vicinity of the cylinder head. If it is a hot start, the engine oil is in place, lubricated and sealed, and the sound will naturally be small. So the cold start will be louder, but it won't last long, 2 minutes at most. If the engine roars for a long time, it should be checked at the maintenance station as soon as possible.

If the engine is loud and squeaky during cold start, check the use of engine oil. If inferior gasoline is used, it will also lead to the decrease of engine power, the increase of carbon deposition inside the engine and the increase of engine noise.

If the engine vibrates, it will also cause engine noise. The creaking sound should be the abnormal sound caused by the slippage of the water pump belt or engine belt after aging, or the wear of the water pump impeller, water pump bearing or generator bearing after lack of lubrication. It may also be caused by the friction between the engine claw and the bracket when the engine jitter is large. Check these one by one, and you can find the reason.