Question about 2003 Toyota Tundra

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Alternator whine Alternator constantly whines, belts are new, charges and starts fine. Noise increase with speed of vehicle

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I had a buddy that had the same problem with his Altima for about a year and I kept telling him that his alternator was going to die and he wouldn't believe me.  I was suprised it took so long, but it eventually gave up the ghost and I replaced it for him.  Fixed the whine and now we can't here him coming before we see him any more.  The only way you are going to get rid of it is to change it out.  This is the warning that it is on it's way out.  Hope this helps.  Thanks for an honest rating and for using FixYa.

Posted on May 19, 2009

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Bearings are dry in alternator, and it won't be long before they totally go out. Probably on a long dark road, miles away from help.

This alternator ISN'T cheap! Suggest you remove, and replace. Or at least be aware that it will go bad, and prepare yourself accordingly.

Posted on May 19, 2009

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Have a whining noise in my engine, replaced alternator 2 times, garage said it was tensioner, replaced, still have whining, loud on start up, changes pitch when gears change, another alternator?


Hello Kim,

What type of vehicle are we discussing here? Engine? 2 WD? Transmission?

Is the whining noise present at idle?

Is your vehicle air conditioned?

I need some details to provide assistance.

May 29, 2016 | Cars & Trucks

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Recently developed a whinning when I first start to move


Where is the whining noise actually coming from .. engine/gearbox or elsewhere?
A whining/screeching noise could be a drive belt .. such as the belt that drives the alternator.

On a manual car it could be the clutch bearing making the noise until it warms up. Does the clutch make a noise when you depress the pedal? That's the thrust bearing .. the bearing that operates the clutch.

I don't think you have too much to worry about. If you had engine trouble there would be knocks, rumbles and strange noises at all speeds.

A whining noise is usually associated with something spinning/turning .. such as a pulley/idler on a drive belt or a bearing alternator.

Put your mind at rest - get a mobile mechanic's opinion.

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Nisson Maxima ST -2001


It could be the bearings in the alternator or could be the bearings in the idler pulley or trenchener pulley. if the alternator goes out it will not charge the battery if the others go then the belt will brake and you can cause more damage to the car.

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High Pitched Whine


A high pitched whine like that indicates a bad bearing. Water pump, power steering pump, accessory belt slipping, alternator bearing, or in the worst case scenerio, Transmission pump.

Dec 12, 2013 | 2001 GMC Yukon XL

1 Answer

Engine making whining noise


There are a couple of things to check. If your power steering pump is low on fluid, or a bad bearing is in the Alternator, they will whine. The PCV valve or any hole in the Vacuum lines will whine as RPM is increased. Even having the Air filter box not fully seated will make a whining noise.

Now both automatic and manual transmissions can whine as RPM is increased. Check fluid for each.

Serpetine belt and pulleys-can make noise.

Sometimes you can shift into neutral at any speed and the engine rpm will drop almost instantly as the car rolls at speed. If the problem disappears as soon as the rpm drops, then an engine part probably is the reason.

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2005 Chevy trailblazer ext. engine whines constantly. Truck seems to operate fine, but the constant whining is annoying. What is it? Idler pulley was replaced a few years ago.


Sometimes when your altenator bearings are going bad they will make a whining noise, could also be power steering pump, try to see if you can isolate the noise to one or the other, is it louder on one side of the engine or the other side. That would help to narrow it down.

Sep 29, 2010 | 2005 Chevrolet Trailblazer Ext

2 Answers

1996 Chevy Lumina Sedan Whining noise from engine


The pattern you describe is consistent with an alternator going bad. Maybe the fields are already rubbing together. Test it this way: Start the car and leave on idle, when the whine is worse, then start using up electricity, by increasing the demand. Turn on AC, then lights, then full blower and then high beams. If there is a change in the whine, then either alternator or voltage regulator is the culprit. When a compressor pulley bearing is bad, noise shifts just by turning AC on and off.

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4 Answers

I have a high pitched noise which appears to be coming from front right engine compartment (as you are looking at the engine) which sounds kind of like a belt that is squealing. It is intermittent. Just...


Could be several things. WHICH ENGINE?.. 4 cylinder (has three belts, power steering/water pump, alternator & A/C compressor, one tensioner pully A/C compressor), The V6 2.7 (has only one belt, 1 Idler pully and 1 tensioner pully), the V6 3.5 has two belts - A/C/alternator, and power steering - there are two tensioner pullys). Noises can be caused by the belt(s) themselves, pullys, bearings, pully bearings, water pump shaft bearings (or belts/pullys rubbing up against something). Let's not forget that there is also belt(s) behind the Timing Belt cover as well as pullys and bearings associated with the timing system. You could start by removing one accy drive belt at a time (alternator, water pump, compressor, power steering, etc) to see whether or not the noise goes away in each case. If after each case, you discover the noise is still there, it's probably behind the timing belt cover (idler/tensioner pully, water pump shaft bearing, crankshaft bearing, etc.). Good Luck

Jun 29, 2009 | 2004 Hyundai Santa Fe

2 Answers

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 . . .

Jun 17, 2009 | 2001 Chevrolet Metro

1 Answer

Whining noise when the engine running


Yep, That was it. i followed a link to trailvoy.com 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..

Apr 11, 2009 | 2006 GMC Envoy

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