noisy electric fan 98' 528i - BMW Forum

simonmotola · 10-07-2011, 11:11 AM

I have this beautiful 528i, the auxiliary cooling fan became extremely noisy, I replaced the fan thinking the bearings are worn, brand new fan make the very same noise. Any ideas??

Jack Dabsy · 10-07-2011, 02:11 PM

Must not be the fan, then !!

brettski · 10-08-2011, 05:30 PM

Welcome tot he Werkz.

When do you hear the noise? (engine running & hot, ignition on, or only when AC is active?)
Can you describe it?

simonmotola · 10-10-2011, 09:39 AM

[QUOTE=Dabsy;641773]Must not be the fan, then !![/QUOTE
I wish it was that easy, the noise stops when I disconnect the aux. fan:

simonmotola · 10-10-2011, 09:50 AM

Quote:

Originally Posted by brettski

Welcome tot he Werkz.

When do you hear the noise? (engine running & hot, ignition on, or only when AC is active?)
Can you describe it?

The noise starts as soon as I start the car, engine cold, A/C off or on the fan is on, it does not matter if the engine is hot or cold, the thing sounds like an airplane prop. as soon as I disconnect the fan's plug the noise stops

Jack Dabsy · 10-10-2011, 02:19 PM

Is it catching on anything as it spins?

simonmotola · 10-10-2011, 02:42 PM

Quote:

Originally Posted by Dabsy

Is it catching on anything as it spins?

No it is not catching on anything, you know it sounds like a electric motor that the bearings went bad on it, I replaced the fan with a new one to no avail, the brand new fan makes the same noise.