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Q: my engine is making a constant whinning sound on 1999 Ford F-150

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My engine is making a constant loud whinning sound the whole time I have it cranked.
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(2) Comments
By 'cranked' do you mean while you have the starter engaged? If so, then I'd suspect the starter drive and ring gear on the flywheel. If 'cranked' means when the engine is running, then I'd suspect the alternator, water pump, power steering or any other system driven by the engine.
thanks I meant the loud whinning sound is constant and when I am driving. It sounds like some kind of large windup toy. Someone mentioned it my be alternator bearings.
Thanks. I meant when running. The noise is loud and sounds like some large mechancal toy going down the road. Someone mentioned itmay be alternator bearings
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