What is the reason for the buzzing sound after the Tiguan is turned off?
1 Answers
When the engine of the Tiguan is still making noise after being turned off, it is actually the sound of the fan. The Tiguan is equipped with a turbocharged engine, and the fan continues to cool and rotate after the turbocharged vehicle is turned off, which is a normal phenomenon. More details are as follows: 1. When using a turbocharged engine model, it is important to note that after parking, do not immediately turn off the engine. During engine operation, some of the oil is supplied to lubricate the turbocharger rotor bearings and for cooling. 2. After a running engine is suddenly shut down, the oil pressure quickly drops to zero, and the high temperature from the turbocharger turbine section is transferred to the middle. The heat in the bearing support housing cannot be quickly dissipated, while the turbocharger rotor continues to rotate at high speed due to inertia. Therefore, if the engine is suddenly shut down while it is hot, it can cause the trapped oil in the turbocharger to overheat and damage the bearings. 3. After the engine has been running under heavy load for an extended period, it should idle for 3-5 minutes before shutting down to allow the turbocharger rotor speed to decrease. It is especially important to avoid suddenly shutting down the engine after revving it several times. After starting the engine, especially in winter, let it idle for a while to allow the lubricating oil to fully lubricate the bearings before the turbocharger rotor reaches high speed.
