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When you put an idler pulley on, what is the best way to get the belt back on a 2002 Chev duramax diesel without taking everything apart?

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Follow diagram on the radiator housing. Put belt on harmonic balancer first then work you way around each pulley according to the diagram. It is a tight fit but it can be done. Get the belt on all the pulleys except the alternator. Use a 3/8" breaker bar or socket wrench to pull up on the tensioner and slip the belt over the alternator pulley. Install with ribbed side of belt to ribbed pulley, smooth side of belt to a smooth pulley. Each type of truck will have a different routing pattern.

Posted on Jan 09, 2010

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snorkelbobby_55.gif

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Carefully check the condition of the belt, the tensioner, and the idler pulley. I had the same thing happen and once I knew where to look, I could see that my idler pulley bearings were bad (understatement...they were GONE!)

Your idler pulley and tensioner need to look even and straight and not leaning in or out. A sure sign of a problem is if one or the other leans in toward where the tension from the belt would be on it.

The best way to check is to buy, rent, or borrow a serpentine belt wrench to take the pressure off and then try and wiggle the tension and idler pulley. If you feel any play, replace as soon as possible. I dragged my feet and ten days after I heard the noise, my idler pulley flew apart right as I pulled into work.

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Need to replaCE WATER PUMP 2002 GMC DURAMAX DIESEL how hard?


cardenderek,
This info is totally bogus.You obviousely have never changed a water pump on a 6.6 liter Duramax Diesel engine.1st off it isnt belt driven it is gear driven from the drive train inside the engine.You have to remove the fan shroud,clutch fan assem.,and harmonic balancer as one of the mounting bolts is behind the balancer.Also remove the left side inner fender for easier access.

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If you would: Before Clicking: Let me know if this helped you, or if you have any additional information or questions. Feel Free to contact me at FixYa.com!
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196759.jpg The 5.9L diesel engine accessory drive system (with a/c) consists of :
  1. Generator Pulley (1)
  2. Water Pump Pulley (2)
  3. Idler Pulley (3)
  4. Power Steering Pump Pulley (4)
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CAUTION: When installing the accessory drive belt, the belt must be routed correctly. If not, engine may overheat due to water pump rotating in wrong direction. Refer to or for correct engine belt routing. The correct belt with correct length must be used.
1. Position drive belt over all pulleys except water pump pulley. 2. Attach a 1/2 inch ratchet to tensioner.


196757.jpg The 5.9L diesel engine accessory drive system (without a/c) consists of :
  1. Generator Pulley (1)
  2. Water Pump Pulley (2)
  3. Idler Pulley (3)
  4. Power Steering Pump Pulley (4)
  5. Radiator Fan Pulley (5)
  6. Crankshaft Pulley (6)
  7. Automatic Tensioner (7)
3. Rotate ratchet and belt tensioner clockwise. Place belt over water pump pulley. Let tensioner rotate back into place. Remove ratchet. Be sure belt is properly seated on all pulleys.

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Instructions


Just did mine today.....Jack up the front as high as possible, remove front passenger wheel, put jackstands under car so it doesn't come down on you, remove the plastic inside fender well by taking out the 2 bolts and 3 plastic toggles, you need to remove the alternator belt to get to the power steering belt so loosen the center nut on the idler pulley/tensioner and then loosen the idler using the bottom nut/bolt to take the tension off the belt, remove the alternator belt first drawing a picture of how the belt is routed on all the pulleys for reassembly. Now loosen the 2 face nuts/bolts on the power steering belt idler pulley/tensioner and then use the nut/bolt on it's bottom to take the tesion off the belt and then remove the belt. Reinstall the belt and reverse everything to get it back together. Put on a new alternator belt on while your at it.

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