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Old 11-30-2012, 06:34 AM
rush_ad rush_ad is offline
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Location: Tampa
 
Join Date: Nov 2011
Posts: 59
Mein Auto: 2003 530i
I've experienced this issue on the 2003 E39 530i.

For me, the problem occurs when driving in slow traffic (5-10mph) for 10-15 mins. It also happens if I keep the car running in Park position (so the car is not moving) for about 5-10 mins. This usually happens at low RPM, ~1000-1500.

The fan start spinning violently and I hear the noise inside. From outside it is very very loud like a huge truck.

I do not experience these loud fan noise when driving at highway speeds (60-80mph). May be because fan noise blend into other highway noises.

The temperature gauge does not fluctuate. It remains normals.

I purchased the car used with not much history. I do not know if the previous owner replaced radiator or waterpump.

Any suggestions?
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