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Thread: Serpentine belt rattle
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    Serpentine belt rattle

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    I have an 08 fusion with a 2010 fusion 4 banger engine in it. When I swap the engine I have an belt rattle when its idling. But when I press the throttle the rattle stop. What could be the rattle problem. I switch tensioners twice no,change.

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    Did you replace the idler pulley?

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    I would suggest looking at the idler pulley as well.
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    I did not look at that. Do I replace it or tighten it?

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    Quote Originally Posted by dextrickbell View Post
    I did not look at that. Do I replace it or tighten it?

    Sent from my VS995 using Tapatalk
    You can see if the bolts are loose, but most likely you'll need to replace it.


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    So changing out #5 on the diagram will make the clacking/rattle noise go away? Its on the when the car is idling at a complete stop. But soon as I press the gas it goes away. I can see the belt jumping right by the belt tensioner as it passed the tensioner and could also see the tensioner itself vibrating when the car is running.

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    The only way to really find out is to replace the parts, idler pulley do go bad because the ball bearings inside wear down. Plus the part is really cheap.
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    I've been seeing only it could be the belt itself. Get a smaller belt made for the 08 and should correct the rattle

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    Hopefully a new belt will fix it for you.

    Quote Originally Posted by dextrickbell View Post
    I've been seeing only it could be the belt itself. Get a smaller belt made for the 08 and should correct the rattle

    Sent from my VS995 using Tapatalk

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    What size belt do I need? I just brought the 4060882 its a lil bit to short and I brought the 4060868 and it was shorter than the 4060882. I do have the 2.5l engine out the 2010 fusion in my 08 fusion. The original engine is 2.3l

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