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What would cause a fast ticking sound from under the car after its turned off?

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An irregular ticking that slows downs over time is probably a hot exhaust component (exhaust manifold heat shield, down pipe, catalytic converter, etc.) contracting as it cools off. This is normal if it stops after a few minutes.

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First answer by Rwcummins. Last edit by Rwcummins. Contributor trust: 113 [recommend contributor]. Question popularity: 24 [recommend question]

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