What if the exchange of goods in Polk City is always delayed?

1. Oil: If the viscosity of vehicle oil is too high, it will easily lead to problems in engine operation and poor lubrication, resulting in loud engine noise. So go to the repair shop in time to check whether it is time to change the oil, or calculate whether it is time for maintenance. 2. Belt: Check whether the belt is loose. Sometimes the belt is loose, which will make the engine compartment louder. 3. Water temperature: If the engine is noisy, it may be that the water temperature is too high, depending on whether the water thermometer is normal and whether there is smoke in the engine compartment. Be sure to change the coolant before winter. 4. Idle speed: If the noise is relatively high when idling and the vehicle is idling at high speed, it is very likely that the throttle, air inlet and nozzle of your car will be cleaned, especially the throttle. 5. Sound insulation: If you listen to the normal operation of the engine outside and feel loud when sitting in the car, it means that your vehicle has poor sound insulation effect. You should check the sealing strip of the vehicle to see if it is aging. Or increase the sealing effect of the vehicle, and then try the noise.