Dodge Caliber Decoupler Pulley at Houston 77032 TX USA

Replacing the alternator decoupler pulley can fix a grinding or whining noise that increases with engine RPM. The decoupler has an internal bearing that fails and results in this weird sound shown at 0:21. 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.

Since you need to remove the serpentine belt and the lower idler pulley to access the lower alternator mounting bolt, this is a good opportunity to replace them both.

Here are some links to the parts I install in this video:

Alternator Decoupler Pulley –

Idler Pulley –

Serpentine Belt –

I always perform repairs according the factory service manual. You need to have all the information (toque specs, testing procedures and schematics) to insure you’ve pinpointed the actual problem and to insure your vehicle is safe after you’ve completed your repairs. You download high quality factory service manuals here:

Here is a list of tools I use in this video in order of which they appear: 15mm socket, electric impact driver, serpentine belt tool with a 16mm socket, 19mm socket or lug wrench, 10mm socket, pocket screwdriver, 1/4 drive flex head ratchet, 3/8 drive flex head ratchet, 16mm socket, 13mm socket, small hammer (not pictured), large flat blade screwdriver, 17mm Hex (Allen) socket.

This video features original music by KaiChow Lau. Check out his soundcloud here:

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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