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Just recently did engine swap had some hiccups but got it running good. Stock exaust motor is the same d17a1. The rattle has been here since putting motor in. Ac has no belt so has no drive I've taken off some heatshields to see if maybe that was the problem to no avail. I've been looking for days for anybody having same issue but no videos to tell if it's the same noise. I found one completely different car sounded almost exactly the same people were saying fuel lines. It's coming from driver side near all the pulleys and belts. Can't post videos on here I do have a video of the sound. https://www.reddit.com/r/GolfGTI/comments/zudbja/weird_engine_noise_at_2000_rpm_happens_in_any/ That's almost exactly the same nosies but coming from a different place.