Quote:
Haunt The House said:
Recently, after driving for 30 minutes, I would start hearing very loud fan noise blasting at full speed. Initially I thought the sound was coming from a bus or a truck, but it is actually from my X6..
It gets so loud that the pedestrians would turn around and stare.
After deeper investigation, I found a pattern:
When the engine temperature reaches 4 blocks (110 degrees C), the fan starts spinning at maximum speed loudly for 5 seconds. Then it repeats several times until the temperature reaches around 3 blocks (90-100 degrees C).
I asked several mechanics, and they all said this is normal.
I don't really think this is normal as I have never heard the fans so loud before.
I am guessing if it could be one of my temperature sensor failing?
Or could a lack of coolant cause the problem? My coolant level is just a tiny bit above the minimum.
P.S. My warranty already expired, so I am seeking advise here.
Thanks!!
EDIT: Problem found, details and costs posted at #8 below
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Insufficient coolant can lead to overheating, triggering the fan to run at higher speeds to cool the engine. Checking and maintaining the proper coolant level is essential for optimal engine cooling.