How do I install the serpentine belt on a 2003 Ford expedition?

Robert, Serpentine belt diagram. Check the attached links,instruction and guides, Good luck
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either you have a bad conection at the batttey, a low battery, a loose serpentine belt or your alternator is surging and needs replaced

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.
     

Hope this helps:

Removal & Installation

1. Remove the air cleaner outlet pipe.
   
2. Rotate the drive belt tensioner clockwise and remove the drive belt.
   

Rotate the drive belt tensioner clockwise and remove the drive belt

To install:

1. Installation is the reverse of the removal procedure. Make sure the belt is routed properly
   

Accessory serpentine belt routing-Ford 4.6L, 5.4L, and 6.8L engines with A/C

Accessory serpentine belt routing-Ford 4.6L, 5.4L, and 6.8L engines without A/C

Please let me know if it's diesel because the routing is different.

acess to the tensioner is the problem. You will need to be able to get your wrench into that space. I recommend a "pen magnet" as I myself have dropped a bolt durring this operation and it can get into places you cannot reach. The tensioner itself isn't hard to install. The tension will have to be overcome to replacce the serpentine belt. Your belt is a poly-V and it HAS to be ALL the way on. A large scewdriver will work. Be carefull not to damage the belt. good -luck. It takes about an hour for this operation.

2003 FORD TAURUS - V6 3.0L 182ci FLEX FI N 2
and
2003 FORD TAURUS - V6 3.0L 182ci GAS FI N U




2003 FORD TAURUS - V6 3.0L 182ci GAS FI N S



Good luck.

log itno autozone.com

they have free tech solutions and diagrams...........

FIRST YOU NEED A SERPENTINE REMOVAL TOLL FOR FORD VEHICLE AND CONNECT TO THE BELT TENSIONER AND PUSH UP OR DONW AND SLIDE BELT OFF '''NOTE THE WAY THE BELT GOES ON''

purchase repair manual from local parts store and serpentine belt removal tool fairly cheap and easy to use.

i want to replace a egr on my f150 and hear you need to clean the throttle body too.