4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

Squeeking sound from engine

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Old Feb 1, 2008
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blegit's Avatar
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From: Las Vegas, NV
Squeeking sound from engine

well i just got my truck back from the dealer the other day because my engine belts were all loose and jacked up. all went good for a day and then one morning i start up the ranger and i hear a squeeky sound from the passenger side. however after about 3 minutes of driving or even idling the squeeking goes away and the truck sounds just fine. also; when it is squeeking for the first few minutes i have the truck on and rev the engine the squeeking gets more "intense" but will actually go away quicker. anyone know what the problem could be?

P.S. i have an 03' 4X4 XLT model
 
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Old Feb 1, 2008
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blegit's Avatar
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also my transmission fluid smells exactly like cow manure
 
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Old Feb 1, 2008
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get new tranny fluid now dont dive till u do it and buy new belts ur belts are probly streched out a little and it slipes till the belt warms up maybe but chance ur trans fluid NOW!!!!!!!!!!!
 
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Old Feb 1, 2008
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blegit's Avatar
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k thanks for the advice cameron
 
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Old Feb 1, 2008
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yep i dont think u want go go buy a new tranny what colors ur tanny fluid?
 
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Old Feb 1, 2008
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blegit's Avatar
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its the typical redish color. not dark or anything but it just smells sooo different haha
 
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Old Feb 2, 2008
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What you describe is typical of a FEAD bearing that's not properly lubricated.
(front end accesory drive)

More than likely it's the tensioner arm pulley. (pass side of a 4.0L)


Background.. when a bearing is cold and in-adequatly lubed. It operates dry. And for a short time the rolling elements (***** and rollers) are loose in thier raceways. As the metal heats up it expands. As they expand & heat up, the bearings grease starts to fully coat everything as well as the clearances getting tighter. So.. the noise gets softer and goes away. Sometimes the noise will go away instantly as well.
If this is the real problem it will only get worse. Sooner or later the bearing will develope a rough sound and eventually fail chucking the belt off.


Regards, Rich
(FEAD engineer for 6 yrs )
 
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Old Feb 2, 2008
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OTRtech's Avatar
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Hey Rich , last summer someone posted that he placed a shim washer on the locator pin on the tensioner assembly.Supposedly it changed the angle of it enough so the belt rode flatter on the pulley. You ever hear anything about that happening ?
 
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