Serpentine belt replacement on 2001 impala

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Dec 14, 2012 - 10 posts - ‎3 authors

Check alternator output against specs. I suspect that the issue is with the belt not being properly lined up with the pulleys

Here you go. Hope this helps :)

Instructions

1. • 1
     Lift the Expedition's hood manually. Remove the negative battery cable end from the negative battery terminal using the battery wrench. Make sure to put the cable end in a place where it cannot accidentally contact the battery during the repair.
     
   • 2
     Examine the serpentine belt routing diagram for the location of the Expedition's automatic belt tensioner. The Expedition's belt routing diagram is on the fan shroud.
     
   • • 
       
     
     
   • 3
     Move the automatic belt tensioner off the belt with the serpentine belt tool. Pull the belt off the alternator pulley by hand before releasing the pressure on the tensioner with the tool and allowing the tensioner to slowly move back into position.
     
   • 4
     Remove the Expedition's charging circuit harness from the back of the alternator by hand. Remove the ground strap for the alternator's ground stud using the socket set.
     
   • 5
     Remove the mounting bolts that hold the alternator to the alternator bracket using the socket set. Lift the alternator out of the Expedition's engine bay by hand. Set the replacement alternator into the alternator bracket manually.
     
   • 6
     Install the alternator mounting bolts by hand first and then tighten them with the socket set. Connect the charging circuit harness by hand. Bolt the ground strap to the ground stud with the socket set.
     
   • 7
     Reinstall the serpentine belt onto the alternator pulley by reversing your removal method. Bolt the negative battery cable back onto the battery using the battery wrench. Close the Expedition's hood.
     

Pop the hood of the car and locate the serpentine belt routing diagram. The diagram on the 2003 Chevrolet Impala is on top of the fan shroud. The diagram will be a picture of all of the accessory pulleys and how the serpentine belt is routed among the pulleys. This diagram will give you the exact direction for routing the new belt onto the pulleys. If you cannot find a serpentine belt routing diagram, take a notepad and pen and draw out the exact routing diagram of the old belt across the pulleys.

2 Locate the serpentine belt tensioner. It is located below the alternator on the left front side of the engine. The tensioner on the 3.4 liter, 3.5 liter and the 3.9 liter engines will require a 3/8 ratchet to release the belt tensioner. The 3.8 liter engine will require a ratchet and a 15 mm socket for the belt tensioner. Rotate the belt tensioner clockwise to loosen and remove the belt from the belt tensioner pulley.

3 Slide the old belt from the belt tensioner pulley. Remove the belt from the remaining pulleys and pull the belt from the engine compartment.

4 Route the new belt across the crankshaft pulley first. The crankshaft pulley is the big pulley on the bottom of the engine in the center. Then route the serpentine belt across the remaining pulleys as directed by the serpentine belt routing diagram. Leave the belt tensioner pulley for last.

5 Rotate the belt tensioner clockwise again to relieve the tension and slide the new belt across the top of the belt tensioner pulley. Release the belt tensioner and the belt will tighten up as the tensioner applies pressure to the belt. Make sure the new belt is properly seated in all the pulleys.

6 Crank the engine and inspect the belt again to make sure that it stays seated in the pulleys.

Read more: How to Replace a Serpentine Belt on a 2003 Chevrolet Impala ' eHow.co.uk http://www.ehow.co.uk/how_6120665_replace-belt-2003-chevrolet-impala.html#ixzz1Yi6QLAjb

Serpentine belts can last a long time, they are tough. Much more important is condition. The V ribs on the working 'face' side should be free of excessive cracks. Likewise, the smooth 'back' of the belt gets polished by wear over time but it too should be free of cracks and excessive fraying.

any cracked belt should be replaced. the timing belt drives the cam shaft while the serpentine drives the power steering pump, alternator, water pump, air conditioner compressor, etc. if it breaks in the middle of nowhere, car will get hot real fast and become very hard to steer as you try and find somewhere to pull over. it will also be in the night and adverse weather. so replace it now when it is convenient.

Easiest way is to release the tension and remove the belt from the alternator and secure it with a bungee cord to someplace that will hold it around the other pulleys. The decal showing the routing should be on the underside of the hood in case it comes off.

the recommended replacement is usually 60 k however i think that belt can go to 100.000 miles, i would not recommend that, because todays driving conditions, the serp belt is a separate belt used to drive the accesories, i.e alt, power steering, a/c and should also be replaced ,however that type of belt can last up to 60.k

it shouldnt be a bolt it should be a tensioner. i dont think you should be taking bolts off. find the tensioner it will wither be like a 15 mm bolt that is used to move the tesioner or a 3/4th inch breaker bar slot/ratchet slot. you may also want to see at autozone or napa ect if there is some special tool you need for that tensioner.

This procedure is for anybody who has has trouble getting a serpentine belt on. It's easy and doesn't require a prybar.

• Get a 14mm or 9/16" socket and a long handled ratchet or breaker bar.
• Get the belt around all the pulleys except the A/C compressor or Alternator.
• The tensioner pulley is near the Alternator toward the center of the engine. It's on a spring loaded arm. Get your socket on the center nut of this pulley.
• Slowly pull the ratchet toward the center of the engine. The pulley will pivot on the arm allowing you to get the belt on the final pulley.
  
• Slowly release the tension.
  
• You're done

Mike