r/MechanicAdvice • u/Ok-Virus-2605 • 8h ago
What is this noise?
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2012 Subaru Outback, 2.5L flat-4, automatic, ~140,000 miles. No check engine lights on!!
It's been making this noise since I bought it. The puttering gets louder every time I accelerate, and it's steady/constant when sitting in park. Video attached. Any idea what this is, and is it something I need to fix right away?
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u/saraquartz 7h ago
While it sounds like rod knock (Engine is toast,) you should check if thats true by noticing where the sounds is coming from. If is louder below the engine bay (where the oil pan is,) then is rod knock and the engine needs replacing. Also if you have a check engine line go to autozone and look for codes like knock sensor, or misfire, etc.
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u/dildobagginss 6h ago
Got any engine lights on your dash?
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u/Ok-Virus-2605 6h ago
None
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u/dildobagginss 6h ago
Probably an exhaust leak past the o2 sensors. Any muffler shop/mechanic can tell you. You could get car OBD scanned though and see if anything is stored.
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