Thread: ID this noise
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Old 12-27-2025, 05:48 PM
Salty B. Salty B. is offline
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Quote:
Originally Posted by X5chemist View Post
Wow, that's loud. Do you have a mechanic stethoscope? Brake booster, vacuum reservoir, or oil separator valve. Remove the oil cap at idle. Does it have a large vacuum suction on it?
Yep, definitely some strong suction. Is that normal? It's an M54.
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