The engine of Buick Excelle is obviously noisy when driving. What happened?

Have you ever met a 1 1 excelle that drove more than 80 miles, and the noise inside the car was like engine noise? How to solve it? Have you ever encountered a 1 1 excelle (check the transaction price | vehicle details) driving more than 80 miles, and the noise inside the car is like engine noise? How to solve it? In the same driving environment, if it is suddenly found that the noise emitted by the engine is louder than normal, it proves that there are some problems with the vehicle. We should find the source of the problem and solve it in time to avoid danger. 1. Determine the source of engine noise and troubleshoot: 1. Engine oil: The viscosity of vehicle engine oil is too high, which may easily lead to problems in engine operation and poor lubrication effect, 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 likely that the throttle, air intake 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, sitting in the car feels loud, indicating that the sound insulation effect of the vehicle is very poor. 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. Second, the unknown source of engine noise is large. One-by-one investigation method 1. Poor fuel quality: change fuel. 2. The cooling water temperature is too low: check the thermostat and replace it if necessary. 3. Incorrect gas distribution or oil supply timing: check and repair and adjust; 4. Poor atomization of fuel injector: check, repair and adjust; 5. Too much fuel in the fuel injection pump: check and adjust; 6. Damage of shock absorber: Check whether it is damaged, connect bolts and replace damaged parts. 7. Air leakage or improper valve adjustment: Dismantle and build the valve and adjust it. 8. Excessive gear clearance or broken teeth: Check and replace the damaged parts 9. Cylinder liner or piston is worn or broken: check and repair or replace 10, push rod is bent or broken: replace 1 1, piston ring is broken or worn-check or replace damaged parts 12, bearing bush is excessively worn: check and replace bearing bush 13. 65438+ This problem should be treated rationally, because there is no constant standard for the magnitude of engine noise, which produces different degrees of noise with different engine speeds. @20 19