There is a loud howling noise under hood when I shut fan speed button to off. But noise goes away when switch to ac
Mar 7, 2015 at 2:30 PM
loud howling noise under hood?
2007 NISSAN ALTIMA
WATERFORME48
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Hi,
Chances are it is related to one of the belt-driven accessories. In this case, I would recommend removing the serpentine belt to see if there is any play in the pulleys. Also, spin one at a time to see if you feel any roughness when turning that may indicate a failing bearing.
I attached the directions for the removal and installation of the belt. As aforementioned, remove the belt and check for possible issues.
Let me know what you find.
Take care,
Joe
See pics below.
Chances are it is related to one of the belt-driven accessories. In this case, I would recommend removing the serpentine belt to see if there is any play in the pulleys. Also, spin one at a time to see if you feel any roughness when turning that may indicate a failing bearing.
I attached the directions for the removal and installation of the belt. As aforementioned, remove the belt and check for possible issues.
Let me know what you find.
Take care,
Joe
See pics below.
Images (Click to enlarge)
Mar 28, 2024 at 8:15 PM
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