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Q: Had timing chain,guides, and tensioner replaced, Still making a sort of buzzing noise when i accelerate then let off the gas.

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Is this normal ?

My car has 163000 miles.
My car has an automatic transmission.

A buzzing or rattling noise is not common when you replace these components. If you’re hearing a rattle, it is possible that the pulley is loose or was not properly attached. Sometimes this type of noise is caused by an internal transmission component as well. To know for sure it’s a good idea to have a professional mobile mechanic come to your location and complete a car is making a noise inspection.

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