This is a fast-paced tutorial for replacing idler pulley, serpentine belt tensioner, and serpentine belt on a 2008, 2009, 2010, 2011, 2012, 2013, and 2014 Dodge Avenger. But because they share the same platform this video would also be relevant to the Chrysler 200, Chrysler Sebring and Dodge Journey equipped with a 2.4 liter 4 cylinder engine. Replacing the idler pulley and tensioner can fix a grinding or whining noise that increases with engine RPM. Replacing the serpentine belt or even the tensioner can solve a squealing or chirping noise that occurs on startup, when the AC is engaged or even when a power steering load is placed on the pump.
The Dodge Avenger has a notorious issue with the alternator decoupler pulley. When this decoupler fails it can make a similar grinding, whining or moaning sound. Make sure you check the decoupler pulley if your vehicle is making a strange engine noise before installing new pulleys and tensioner.
You'll notice at 2:37 I remove the bolts that hold the tensioner in place in a peculiar manner. This is the easiest way I have found to remove the tensioner. The pulley of the tensioner blocks your access to the upper 13mm bolt. You'll need to put tension on the tensioner to move the pulley out of the way, but this can get tiring and is sort of awkward. I've found that if you loosen the top bolt a little, then remove the bottom bolt you can move the whole tensioner into a position where it is easy to access the upper bolt.
You might also notice that the bolt head size is 16mm on the idler and tensioner on the original equipment but the aftermarket parts use a 15mm bolt head. This is normal and will not affect the performance of the part.
Here are some links to the parts I install in this video:
Tensioner -
Idler pulley -
Serpentine Belt -
Here is a list of tools I use in this video in order of which they appear: serpentine belt tool with a 16mm socket, 19mm socket or lug wrench, electric impact driver, 10mm socket, pocket screwdriver, 1/4 drive flex head ratchet, 3/8 drive flex head ratchet, 16mm socket, 16mm wrench, 13mm deep socket, 13mm shallow socket, 3/8 drive universal joint, 15mm wrench, 15mm socket, 15mm socket for serpentine belt tool.
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Lightning Fix is a fast-paced DIY repair series meant to guide people though repairs in a quick and effective manner.
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