why do hot engines “click” when turned off?

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After driving for a little while, you turn into a parking lot, park your car, turn it off and get out. Then you hear the engine making clicking sounds. It only does it when it’s hot, does it have something to do with metals expanding when they’re hot or?

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Anonymous 0 Comments

Same reason my pipes click when I have a shower, but the opposite. As my pipes get hotter they expand slightly, and eventually shift a little in a small but sudden movement against the braces holding them in place causing the click.

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