ok, so i replaced the belt and tensioner with pulley and I was hoping the noise will be gone, NOPE, noise is back and it looks like i need a new valve cover, something to do with crankcase ventilation system (PCV), i just don't understand how a car with 70k miles needs a new valve cover, this is insane, cost is around 2k to replace... and i have seen multiple people posting about this issue, this sounds like a defective part not maintenance or something that should die at that mileage..
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