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What Causes the Clicking Noise When an Audi Starts Moving?

1 Answers

ValerieMarie

07/30/25 12:31am

A clicking noise when an Audi starts moving may be caused by the following reasons: 1. Hydraulic lifters: Air entering the hydraulic lifters due to low oil pressure or wear in the lifters themselves. 2. Valve clearance: Excessive valve clearance caused by wear in the valve rocker arms. 3. Dirty throttle body: Accumulation of sludge and carbon deposits leading to a dirty throttle body. 4. Carbon canister purge valve operation sound: This is a normal sound and the vehicle can continue to be used. If the sound is too loud, it is recommended to have it checked at an authorized service center. 5. Three-way catalytic converter: A 'clicking' sound within the first half minute after a cold start, which then disappears, is usually due to the expansion of the three-way catalytic converter as it heats up.

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