What is the reason for the noise of Volkswagen Tiguan engine?

Abnormal vibration caused by shock absorber or noise caused by poor engine cooling. The reasons for the noise of Volkswagen Tiguan engine are as follows: 1. Not suitable for viscosity of new engine oil. After long-term use, the engine oil will become thinner and thinner, and more and more carbon will be deposited. After replacing the new oil, the engine can't adapt to the viscosity of the oil, which may increase the speed and cause the engine noise; 2. The sound insulation effect is poor, so it is necessary to check the automobile sealing strip. If the automobile sealing strip is found to be aging, it needs to be replaced with a new one. 3. Coolant, if the coolant is insufficient at low temperature, the noise of the engine will increase, so check the coolant of the car in time; 4. The shock absorber is abnormal, and there is something wrong with the automobile shock absorber, which may easily lead to the increase of engine noise. Pay attention to the shock absorber of the car when driving, so as not to cause the car to malfunction.