What's that sound on cars on a hot day?

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On hot days, cars often produce clicking sounds due to the expansion of sheet metal as it heats up. This phenomenon occurs when the metal expands and overcomes friction at the joints, resulting in an abrupt adjustment that creates the noise. The color of the car, whether silver, white, or black, does not significantly impact this sound. The clicking is characterized by a high frequency, similar to sounds made by metal roofs under heat. Overall, this is a common occurrence related to thermal expansion in vehicles.
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Like on a hot day, cars make these clicking sounds on the surface? Does having a silver or white-colored car make it worst? Because I've seen black -colored ones do that too
 
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flyingpig said:
Like on a hot day, cars make these clicking sounds on the surface? Does having a silver or white-colored car make it worst? Because I've seen black -colored ones do that too

Without actually hearing the same sounds that you hear, it is hard to say what they might be. I believe that a likely explanation is simply the expansion of sheet metal exposed to heat. There is always a certain amount of "looseness" where such parts join, and also a certain amount of friction that opposes free expansion. When the expansive forces overcome the frictional forces, the adjustment is abrupt--producing a "clicking" sound. Metal roofs on structures do exactly the same thing.
 
Let's just say the clicking sounds has a high frequency
 

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