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Old 02-27-2011, 02:01 PM
FX4OR FX4OR is offline
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Join Date: Dec 2010
Posts: 417
Default belt driven rattle

My 4.0 rattles at idle, and I thought it was the timing chain making noise. I took the serpentine belt off, started the engine, and the rattle was gone. put the belt back on, and it returned.
The belt tensioner and the idler pulley both spin pretty freely when I spin them with my hand, which makes me think its one of them rattling. Should they be offering more resistance, or is this normal?
If it is the way they should be, what else could be making the noise?
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Old 02-27-2011, 02:05 PM
01_ranger_4x4 01_ranger_4x4 is offline
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Default

I had a rattle of sorts at idle with mine and I fixed it with a new tensioner pully and a gatorback belt. Its quiet as can be at idle now

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2001 Ranger 4x4 Stepside
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-4:56 gears
-Auburn gear LS
-James Duff traction bars
-Headers
-Flowmaster duals
-SCT X-Cal2 and some small exterior mods

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2005 F-150 Lariat 4x4
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  #3  
Old 02-28-2011, 09:50 PM
FX4OR FX4OR is offline
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Default Re: belt driven rattle

sweet, thanks.
I do have a gatorback on it already, that got rid of the squeaks a while ago.
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