In Reply to: What is that #$@*! 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.....