2003 Nissan Altima engine vibration

2003 NISSAN ALTIMA
85,000 MILES • 4 CYL • 2WD • AUTOMATIC
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JAMESJOB447
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  • 1 POST
when i turn on my air conditioner the engine seems to shift and it cause the fan belt to vibrate and make a loud noise. it does it more when the car is not moving then when it is. I observed the engine when the air conditioner is turned on and there is a noticeable shift/movement in the engine when the air conditioner is turned on and that is when the vibration and noise begins. any help would be appreciated.
Jun 6, 2010 at 7:18 PM
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KHLOW2008
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  • 41,814 POSTS
Hi jamesjob447, Thank you for the donation. Seems the belt is either worn or the auto tensioner is weak. From the diagram, check if the belt is within the indicated range. If yes, then you might have to replace the autotensioner.


https://www.2carpros.com/forum/automotive_pictures/192750_SerpentineBelt03Altima4cylFig04_1.jpg

Jun 9, 2010 at 2:16 PM