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Wastegate rattle
New to the BMW turbo world, but not the turbo world.
The other day it was pretty warm here in NoVA. I was driving with my windows down next to a concrete wall, going up a 8-10% grade, under very light throttle (10-15 MPH through the parking lot). I hear a rattling noise under load, nothing when let off the throttle. Almost sounds like a rattling exhaust due to engine vibration from lugging, but I don't feel anything.
Is this the infamous wastegate rattle?
535, no tune.
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