Question about 2000 Nissan Maxima

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Alternator sqweeks, Found a sqweeking noise this morning coming from the area of the alternator. The noise increases with increasing engine revolution. The battery is OK. no problem starting in minus 10degree C.

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This sounds like your belt is loose or the belt tensioner bearing is bad

Posted on Jan 11, 2009


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2003 Rendezvous when I start to turn the ignition there is a humming noise and it continues after being turned on. As I drive the humming will increase with acceleration and decrease as I slow down.

If the noise appears to come from under the hood/engine area, suspect a bearing in one of the accessory pulleys to be causing the noise. ( Alternator/AC compressor/idler/tensioner etc ).

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Test drove one today, same problem. A google search found the solution: Alternator Tensioner.

Read about it here:

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Replaced alternator 4 times and batterty twice in 3.5 yrs.

I suspect your car has the voltage regulator integrated into the alternator but you should probably check to see if it is separate. Cooking two batteries in that period of time isn't normal but a Saturn (Delco, as yours) ate SIX alternators before it died forever at 57,600 miles by dropping a rod cap. People made fun of my Fiats but none of them ever rose to that level of failures and had far rougher lives.
In the Saturn, there was way too little cooling for the alternator considering the possible heat developed in a small unit (but rated at 105 amps) about the same size as one in a Chevy LUV we owned years ago that was rated at only 30 amps. The Saturn alternator had to lose ~1200 watts of power in the form of heat if producing the rated output and that is way too much for a confined area. Stupid engineers . . .

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97 Lexus Es300 noise under the hood by alternator

mcdevito75 here, If you have 1 continuous belt on the engine (serpentine) then the belt could be worn or the tension pully holding the belt tight could be going bad. No noise in Neautral or Park as increased engine speed in these gears over rides the worn part and thus no noise. On a cold engine examine the belt, look for frays / wear from where the belt rides the pullys. If the belt is 2 years old, Change it.

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1991 park ave 190k miles, loud bearing noise from serpentine belt area at idle, goes away at speeds 10mph and up. has new water pump and alternator, belt is not jumping around, a/c is still cooling. noise...

The serpentine belt area is large. Remove belt and spin the IDLER PULLY of the belt TENSIONER. and listen for a bearing noise. A common failure. Hope this helps

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1 Answer

Sqweeking and vibration

1st place to look is the driveshaft. check the u-joints for play. One great place that gets overlooked is the rear drive shaft but the front joint. Its more of a cv joint than just a u joint. there is a springloaded bearing in the center that is either hard to grease or has no grease fitting. it likes to squeak,

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1 Answer

Whining noise when the engine running

Yep, That was it. i followed a link to and found a video with the same noise and links to how to repair. My husband fixed it yesterday and the noise is no more!! Good Luck..

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