1A Auto Video Library
Our how-to videos have helped repair over 100 million vehicles.
Enter Vehicle Year Make Model

Specify your vehicle's year, make and model to guarantee fit.

How to Replace Idler Pulleys 2004-08 Dodge Ram

Created on: 2016-05-10

Watch this video to learn how to replace the idler pulleys on your 04-08 Dodge Ram. 1AAuto shows you how!

  1. step 1 :Releasing the Serpentine Belt
    • Familiarize yourself with the route of the serpentine belt under the hood or on the radiator support
    • Insert the 3/8 inch drive ratchet into the tensioner
    • Turn the tensioner clockwise to loosen the belt
    • Pull the belt off the pulley
    • Release the tensioner
  2. step 2 :Removing the Idler Pulley
    • Remove the 13mm bolt from the pulley
    • Remove the pulley
  3. step 3 :Installing the New Idler Pulley
    • Insert the idler pulley into place
    • Tighten the 13mm bolts to the idler pulley
  4. step 4 :Installing the Tensioner
    • Insert the 3/8 inch drive ratchet into the tensioner
    • Turn the tensioner clockwise to loosen the belt
    • Pull the belt over the alternator
    • Release the tensioner
  5. step 5 :Reinstalling the Serpentine Belt
    • Follow this step if your serpentine belt came loose
    • Loop the belt around the crank shaft pulley
    • Bring it around the water pump
    • Bring it under the power steering pulley
    • Bring it over the A/C Pulley
    • Bring it under the upper idler pulley
    • Bring it over the lower idler pulley
    • Bring it around the belt tensioner
    • Pull the tensioner clockwise with the 3/8 inch ratchet
    • Pull the belt over the alternator
    • Release the tensioner

Tools needed

  • 13mm Socket

    3/8 Inch Drive Ratchet

Brought to you by 1AAuto.com, your source for quality replacement parts and the best service on the Internet.

Hi, I'm Mike from 1A Auto. I hope this how-to video helps you out, and next time you need parts for your vehicle, think of 1AAuto.com. Thanks.

In this video, we're going to show you how to replace the idler pulleys on this 2008 Dodge Ram. You'll need a new pulley or pulleys from 1AAuto.com, a 3/8" drive ratchet, and a 13mm socket, and this pulley fits a multitude of vehicles. This video will help you through a multitude of Dodge and Chrysler vehicles.

Here's your serpentine belt. Before removing, you'll want to make sure you have the diagram for it, usually located under the hood or on the radiator support of your vehicle. Using the drive from a 3/8" ratchet, you'll insert it into the slot on the tensioner. Remove the tension from the belt, take it off a pulley.

Your smooth idler pulley is located directly below your alternator. There's a second smooth idler pulley located below the belt tensioner. Installation and removal is the same as the one above. Remove the 13mm bolt in the center of the pulley. The pulley will come right out with it.

Reinstall your idler pulley. These are available from 1AAuto.com, but this pulley seems okay. We're not going to waste a good part changing it. Refer to your diagram or drawing to ensure that your serpentine belt is routed properly.

Install your 3/8" ratchet into your tensioner, release the belt tension, and install the remainder of your belt over your alternator pulley. If your serpentine belt fell off during the repair, or if you decide to replace your serpentine belt at the same time, here's a quick run-through of how to route the belt onto the pulleys properly.

Thanks for tuning in. We hope this video helped you out. Next time you need parts for your car, please visit 1AAuto.com. Also check out our other helpful how-to and diagnosis videos.

2005 - 2008  Pontiac  Grand Prix
2006 - 2010  Ford  Mustang
2006 - 2006  Pontiac  G6
2006 - 2006  Pontiac  Montana
2006 - 2007  Mercury  Mariner
2007 - 2010  Ford  Mustang
2008 - 2009  Ford  F250 Super Duty Truck
2006 - 2006  Saturn  Relay
2006 - 2006  Saturn  Vue
2008 - 2009  Ford  F350 Super Duty Truck
2009 - 2009  Lincoln  Town Car
2008 - 2008  Ford  F450 Truck
2008 - 2008  Mercury  Mariner
1988 - 1991  GMC  G1500
1990 - 1990  Lincoln  Continental
1991 - 1991  GMC  Syclone
1990 - 1991  GMC  Jimmy S-15
1992 - 1994  GMC  Suburban C1500
1992 - 1995  GMC  Jimmy
1991 - 1999  Lincoln  Town Car
1991 - 1994  Oldsmobile  Bravada
1992 - 1993  GMC  Yukon
1992 - 1994  GMC  Suburban K1500
1992 - 1993  GMC  Typhoon
1995 - 2002  Lincoln  Continental
1996 - 1999  Oldsmobile  88
1992 - 1999  Mercury  Grand Marquis
1993 - 1998  Lincoln  Mark VIII
1996 - 1999  Oldsmobile  LSS
1996 - 2000  Pontiac  Bonneville
1996 - 1996  Oldsmobile  98
1996 - 1999  Oldsmobile  Aurora
1997 - 1999  Oldsmobile  Cutlass
1997 - 1998  Oldsmobile  Regency
1996 - 1997  Ford  Thunderbird
1996 - 1997  Pontiac  Firebird
1999 - 2004  Ford  F250 Super Duty Truck
1999 - 2004  Ford  F350 Super Duty Truck
1998 - 2001  Ford  Ranger
1998 - 2000  Pontiac  Grand Prix
1999 - 2004  Oldsmobile  Alero
1999 - 1999  Oldsmobile  Intrigue
1999 - 2000  Mercury  Cougar
1999 - 2000  Mercury  Mystique
2000 - 2004  Ford  Focus
2000 - 2000  Ford  Mustang
1999 - 2005  Pontiac  Grand Am
2001 - 2002  Oldsmobile  Aurora
2001 - 2002  Pontiac  Firebird
2001 - 2009  Ford  Ranger
2002 - 2005  Jeep  Liberty
2002 - 2009  Ford  Explorer
2002 - 2002  Ford  F150 Truck
2003 - 2003  Ford  F150 Truck
2003 - 2004  Ford  F250 Super Duty Truck
2002 - 2009  Mercury  Mountaineer
2003 - 2003  Ford  Mustang
2003 - 2004  Ford  F350 Super Duty Truck
2003 - 2004  Ford  Focus
2003 - 2006  GMC  Envoy XL
2003 - 2006  Jeep  Wrangler
2004 - 2004  Ford  F150 Heritage Truck
2004 - 2004  Ford  Mustang
2004 - 2005  GMC  Envoy XUV
2005 - 2008  Ford  F150 Truck
2004 - 2005  Pontiac  Bonneville
2004 - 2004  Saturn  Vue
2005 - 2008  GMC  Envoy
1990 - 1995  Ford  Thunderbird
1990 - 1990  Mercury  Cougar
1990 - 1990  Ford  Taurus
1990 - 1991  Ford  Taurus
1991 - 1995  GMC  S-15 Sonoma
1992 - 1994  Ford  Tempo
1990 - 1991  Mercury  Sable
1991 - 1991  Ford  Ranger
1992 - 1995  GMC  Suburban C2500
1992 - 1995  GMC  Suburban K2500
1992 - 1994  Mercury  Topaz
1994 - 1995  Ford  Thunderbird
1994 - 1995  GMC  Yukon
1992 - 1994  Oldsmobile  98
1992 - 1995  Pontiac  Bonneville
1995 - 1995  GMC  Suburban K1500
1995 - 1997  Mercury  Mystique
1994 - 1997  Mercury  Cougar
1995 - 1995  GMC  Suburban C1500
1996 - 1998  Ford  Mustang
1988 - 1991  GMC  G2500
1988 - 1991  GMC  G3500
1988 - 1995  GMC  K1500 Truck
1988 - 1995  GMC  K2500 Truck
1988 - 1995  GMC  K3500 Truck
1988 - 1990  GMC  S-15 Pickup
1989 - 1991  GMC  Suburban R1500
1989 - 1991  GMC  Suburban R2500
1988 - 1989  GMC  Jimmy S-15
1989 - 1991  GMC  Jimmy
1990 - 1992  Ford  Probe
1990 - 1997  Ford  Ranger
1989 - 1991  GMC  Suburban V1500
1989 - 1991  GMC  Suburban V2500
1998 - 1998  Mercury  Mystique
1999 - 1999  Ford  Mustang
1999 - 2004  Oldsmobile  Silhouette
1998 - 1998  Oldsmobile  Intrigue
1998 - 2000  Pontiac  Firebird
2001 - 2005  Pontiac  Aztek
2002 - 2005  Ford  Thunderbird
1999 - 2005  Pontiac  Montana
2001 - 2002  Ford  Mustang
2002 - 2006  Lincoln  LS
2002 - 2004  Oldsmobile  Bravada
2003 - 2004  GMC  Envoy
2003 - 2003  Oldsmobile  Aurora
2004 - 2004  Ford  F150 Truck
2003 - 2005  Lincoln  Aviator
2003 - 2009  Lincoln  Navigator
2005 - 2007  Ford  F350 Super Duty Truck
2005 - 2007  Ford  F450 Truck
2005 - 2009  Ford  Expedition
2005 - 2007  Ford  F250 Super Duty Truck
2005 - 2007  Ford  Focus
2005 - 2006  Ford  GT
2005 - 2007  Ford  F550 Truck
2005 - 2005  Saturn  Relay
2006 - 2007  Ford  Five Hundred
2005 - 2005  Mercury  Mariner
2005 - 2005  Pontiac  G6
2006 - 2008  Lincoln  Mark LT
2006 - 2007  Ford  Freestyle
2006 - 2009  Ford  Fusion
2006 - 2007  Mercury  Montego
2007 - 2008  Lincoln  Town Car
2006 - 2006  Lincoln  Zephyr
2006 - 2009  Mercury  Milan
1988 - 1995  GMC  C1500 Truck
1988 - 1995  GMC  C2500 Truck
2009 - 2009  Ford  F150 Truck
1988 - 1995  GMC  C3500 Truck
2005 - 2005  Ford  F250 Super Duty Truck
2004 - 2004  Ford  F250 Super Duty Truck
2003 - 2003  Ford  F250 Super Duty Truck
2003 - 2003  Ford  F350 Super Duty Truck
2007 - 2007  Ford  F250 Super Duty Truck
2006 - 2006  Ford  F250 Super Duty Truck
2007 - 2007  Ford  F350 Super Duty Truck
2006 - 2006  Ford  F350 Super Duty Truck
2005 - 2005  Ford  F350 Super Duty Truck
2004 - 2004  Ford  F350 Super Duty Truck
2000 - 2006  Jeep  Wrangler
2001 - 2001  Dodge  Caravan
2004 - 2007  Dodge  Caravan
2005 - 2007  Dodge  Grand Caravan
2002 - 2002  Dodge  Caravan
2003 - 2003  Dodge  Caravan
2001 - 2007  Chrysler  Town & Country
2001 - 2004  Dodge  Grand Caravan
1993 - 1993  Cadillac  Allante
1994 - 2004  Cadillac  Seville
1994 - 2002  Cadillac  Eldorado
1995 - 1995  Chevrolet  Blazer
1995 - 2000  Buick  Park Avenue
1997 - 2000  Buick  LeSabre
1997 - 1997  Buick  Riviera
1996 - 1999  Cadillac  Deville
2005 - 2005  Buick  Terraza
2005 - 2005  Chevrolet  Uplander
2003 - 2003  Ford  Escort
2003 - 2009  Ford  Expedition
2006 - 2008  Cadillac  DTS
2005 - 2005  Ford  E150 Club Wagon
2005 - 2009  Ford  E150
2005 - 2009  Ford  E250
1998 - 1999  Ford  Escort
1999 - 2004  Chevrolet  Corvette
1999 - 1999  Buick  Regal
1999 - 2000  Ford  Escort
1999 - 2005  Chevrolet  Venture
1998 - 1998  Buick  Riviera
2003 - 2006  Dodge  Viper
2000 - 2005  Cadillac  Deville
2000 - 2002  Ford  Escort
1990 - 1994  Chevrolet  Blazer S10
1990 - 1995  Chevrolet  Corvette
1992 - 1993  Chevrolet  Suburban C1500
1992 - 1993  Chevrolet  Blazer
1992 - 1999  Ford  Crown Victoria
1992 - 1993  Chevrolet  Suburban K1500
2002 - 2002  Ford  E250 Econoline
2002 - 2009  Ford  E350 Super Duty
2002 - 2002  Ford  E350 Econoline Club Wagon
2002 - 2008  Ford  F150 Truck
2003 - 2003  Ford  E150
2003 - 2003  Ford  E150 Club Wagon
2003 - 2004  Ford  E150
2003 - 2004  Ford  E250
2003 - 2004  Ford  E150 Club Wagon
2003 - 2004  Ford  E450 Super Duty
2003 - 2005  Ford  E350 Club Wagon
2003 - 2003  Ford  Focus
2004 - 2007  Buick  Rainier
2004 - 2004  Ford  Focus
2005 - 2008  Chrysler  Pacifica
2005 - 2007  Ford  Escape
2005 - 2009  Ford  F250 Super Duty Truck
2005 - 2009  Ford  F350 Super Duty Truck
2005 - 2005  Ford  E350 Club Wagon
2005 - 2009  Ford  E450 Super Duty
2005 - 2009  Ford  E350 Super Duty
2004 - 2005  Chevrolet  Monte Carlo
2004 - 2006  Chevrolet  Malibu
2004 - 2007  Dodge  Durango
2004 - 2006  Dodge  Ram 1500 Truck
2004 - 2008  Dodge  Ram 1500 Truck
2004 - 2008  Dodge  Ram 3500 Truck
2004 - 2008  Dodge  Ram 2500 Truck
2004 - 2005  Ford  E350 Club Wagon
2004 - 2005  Chevrolet  Impala
2004 - 2007  Ford  F250 Super Duty Truck
2004 - 2007  Ford  F350 Super Duty Truck
2004 - 2007  Ford  E450 Super Duty
2004 - 2009  Ford  E350 Super Duty
2007 - 2007  Chrysler  Aspen
2008 - 2008  Buick  LaCrosse
2008 - 2008  Ford  Escape
2006 - 2008  Buick  Lucerne
2006 - 2006  Buick  Terraza
2006 - 2006  Buick  Rendezvous
2006 - 2008  Chevrolet  Impala
2005 - 2008  Ford  F450 Truck
2006 - 2007  Chevrolet  Monte Carlo
2006 - 2006  Chevrolet  Uplander
2006 - 2009  Ford  E450 Super Duty
2000 - 2003  Ford  Focus
2000 - 2000  Chevrolet  Impala
1999 - 2009  Ford  F250 Super Duty Truck
1999 - 2000  Ford  Contour
1999 - 2004  Ford  Mustang
1999 - 2009  Ford  F350 Super Duty Truck
2002 - 2002  Ford  E150 Econoline Club Wagon
2000 - 2002  Jeep  Wrangler
2001 - 2003  Chrysler  Voyager
2001 - 2002  Chevrolet  Express 3500 Van
2002 - 2002  Ford  E150 Econoline
1990 - 1994  Ford  Aerostar
1992 - 1993  Chevrolet  S10 Pickup
1992 - 1995  Chevrolet  Suburban K2500
1992 - 1995  Chevrolet  Suburban C2500
1992 - 2000  Buick  Park Avenue
1989 - 1991  Chevrolet  G30
1989 - 1991  Chevrolet  Blazer
1989 - 1991  Chevrolet  S10 Pickup
1989 - 1991  Chevrolet  Suburban R2500
1989 - 1991  Chevrolet  Suburban V1500
1989 - 1989  Chevrolet  Blazer S10
1989 - 1991  Chevrolet  Suburban V2500
1989 - 1991  Chevrolet  Suburban R1500
1998 - 1999  Chevrolet  Lumina
1998 - 2000  Chevrolet  Camaro
1998 - 1998  Chrysler  Concorde
1998 - 2000  Chevrolet  Monte Carlo
1996 - 2002  Pontiac  Firebird
1997 - 2002  Ford  E150 Econoline
1997 - 2004  Buick  Regal
1997 - 2002  Ford  Mustang
1997 - 2002  Ford  E150 Econoline Club Wagon
1998 - 1998  Dodge  Intrepid
1998 - 1998  Ford  Contour
1994 - 1995  Chevrolet  Suburban K1500
1994 - 1995  Chevrolet  Suburban C1500
1994 - 1997  Ford  Thunderbird
1994 - 1995  Chevrolet  S10 Pickup
1993 - 1993  Cadillac  Eldorado
1992 - 2000  Pontiac  Bonneville
1994 - 1994  Chevrolet  Blazer
1993 - 1993  Cadillac  Seville
1995 - 2000  Mercury  Mystique
1996 - 1996  Ford  Mustang
1996 - 2002  Dodge  Dakota
1995 - 1997  Buick  Riviera
1995 - 1995  Chevrolet  Tahoe
1995 - 2002  Chevrolet  Camaro
1995 - 1997  Ford  Contour
1988 - 1995  Chevrolet  K1500 Truck
1988 - 1995  Chevrolet  K2500 Truck
1988 - 1995  Chevrolet  K3500 Truck
2008 - 2010  Dodge  Viper
2015 - 2017  Dodge  Viper
2007 - 2007  Buick  Rendezvous
1988 - 1991  Chevrolet  G30
1988 - 1988  Chevrolet  G30
1988 - 1995  Chevrolet  C1500 Truck
1988 - 1995  Chevrolet  C2500 Truck
1988 - 1995  Chevrolet  C3500 Truck
Share on:
Go To Top

Same Day Shipping

Need your part faster? Choose expedited shipping at checkout.

Guaranteed To Fit

Highest quality, direct fit replacement auto parts enforced to the strictest product standards.

USA Customer Support

Exceeding customers' expectations, our team of passionate auto enthusiasts are here to help.

Instructional Video Library

Thousands of how-to auto repair videos to guide you step-by-step through your repair.