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Pistons can shrink in a car due to thermal contraction, which occurs when the engine cools down after operation. Additionally, wear and tear over time, as well as exposure to high temperatures and pressures, can cause the piston material to lose its structural integrity, leading to a decrease in size. However, significant piston shrinkage is rare in properly functioning engines, as they are typically designed to operate within specific temperature ranges.

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3mo ago

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