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I also had the same noise? (archive)

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Posted by Simon K on October 06, 1999 at 10:56:17:

In Reply to: What is that #[email protected]*! Humming Noise!? posted by Kirk on October 06, 1999 at 10:41:03:

I also had this noise this morning. I lifted the hood and noticed/ heard two things:
1: The engine cooling fan was running??? (Engine was cold, first start up of the day and it was 50 degrees outside!)
2: Also, a second fan unit that sits at the back left end of the engine bay that seems to have pipes into the engine was also humming???

After about 1 minute, both the fan noises stopped.

Also curious.... Simon.

99 M3, 4500 miles.....

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