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loud screeching!! loud screeching!!
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  #1  
Old 10-25-2009, 02:40 PM
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Join Date: May 2006
Location: Michigan
Vehicle: 1997 F150 4.6
Posts: 184
loud screeching!!
yesterday i just did regular maintenance on my truck 97 4.6L. I gave it an oil change, cleaned the air filter, changed out the rear diff fluid, and cleaned her up too. well when i cleaned it. i took it to the quarter car wash and sprayed down the motor to get some of the grease and stuff off. well that was last night and now this morning i start it up and i hear a loud screeching coming from under the hood. well i am wondering if the engine cleaning has anything to do with this noise. Last month i replaced the alternator w/ pulley, and the idler pulley. it almost sounds like its the water pump but i am not sure. Any help or guidance would be greatly appreciated. Thank you.

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  #2  
Old 10-25-2009, 03:04 PM
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Join Date: Jun 2007
Location: Utah
Vehicle: 1999 Ford F-150 5.4
Posts: 1,413
sounds like you got soap on the belt. If you didnt replace the belt maybe you should. if you did get some belt cleaner.
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Old 10-25-2009, 04:07 PM
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Join Date: May 2006
Location: Michigan
Vehicle: 1997 F150 4.6
Posts: 184
now the noise only starts at around 2500 rpm. anything below that it is gone. Soap can really cause this? ill try some cleaner.
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Old 10-25-2009, 04:50 PM
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Join Date: Nov 2004
Location: NW Indiana
Vehicle: 1998 Ford Expy 5.4
Posts: 1,708
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soaks into the belt... I would take the belt off and scrub it with a mild wire brush... maybe a brass brush
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Swapped 5.4. . . cause 4.6's are only good for taxi's and boat anchors. . .
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