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If there is a clunking noise coming from the front of your car or truck, it could very well be the rotors. When rotors get worn, the warning sign is the clunk. It lets you know it's time to replace the rotors. If the noise is from engine compartment, listen for valve knock or sticky valve lifters or rocker arms at the valve covers. At the lower end of the engine, where the lowest pulley is, listen for water pump and main bearing clicks. On the alternator, listen for bearing failure. All components should emit a faint whir or rotation noise when working properly.

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12y ago

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