Hi and thanks for using 2CarPros.
If possible, upload the audio so I can hear it. In the interim, take a look through this link to see if anything mirrors what you are experiencing. Also, since you just had the work done three months ago, have you contacted the shop that did the work? Also, can you let me know if it is a knocking sound, ticking or something different? Plus, open the hood and see if you can tell approximately where the noise is coming from.
https://www.2carpros.com/articles/engine-noises
Let me know.
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Monday, November 19th, 2018 AT 6:20 PM