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

My engine is making a constant loud whinning sound the whole time I have it cranked.

by in Birmingham, AL on February 22, 2011
2 answers 2 comments
ANSWER by on February 23, 2011
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.
COMMENT by on February 24, 2011
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.
COMMENT by on February 24, 2011
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
ANSWER by on August 26, 2014
CHECK YOUR CLUTH FAN, ITS PROB FROZEN SO ITS THE FAN YOU HEAR AND YOUR LOSING MAJOR POWER AND GAS
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When I crank my truck it makes a whinning sound constantly