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What Causes the Noise After the Vehicle is Turned Off?

1 Answers
SanSarah
09/01/25 4:48am
Vehicle noise after turning off is caused by the cooling fan, thermal expansion and contraction of the exhaust pipe, and the fuel evaporation control system. The following provides a detailed explanation: Noise from the cooling fan: If the engine temperature is relatively high, the cooling fan in most vehicle models will continue to operate for a period to cool down the engine compartment before shutting off, thereby producing noise. Noise from thermal expansion and contraction of the exhaust pipe: The higher the temperature of the exhaust pipe, the higher the frequency of the noise. It is most pronounced immediately after parking and decreases as the exhaust pipe cools down. Noise from the fuel evaporation control system: The fuel evaporation control system pressurizes to check for leaks, and noise is also produced when testing the tightness of the pipelines.
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What kind of engine oil should be used for Roewe RX5?

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What are the body dimensions of the Roewe RX3?

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