E39 Engine Noise

Hello Mr. Peale, it was nice to meet you today. I’ll answer your question again here so that everyone knows. The noise he’s referring to is likely a fan noise. The noise sounds as if the fan is turning too fast, it happens when the clutch in the fan goes bad. He replaced it with a good aftermarket brand and the issue is still there. It is common for even the good aftermarket fan clutches to be louder than factory. I advised him to remove the fan and see if the noise is still there, if it is not then replace the fan with a factory BMW part. Thank you.

Gil Neves