Serpentine belt on rav4

SOURCE: Serpentine Belt Toyota Rav4

Hi maroon,

• 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. Double check your routing.
  
• The tensioner pulley is 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

SOURCE: procedure to change serpentine belt 2006 toyota tacoma?

Here is your Solution!
You will need to Locate the Belt Tensioner. It has a Large Pulley on a Bracket that Has a Bolt in the Middle and a Smaller Pulley that Goes Under the Belt and Holds Tension on it. You will need to get a Wratchet, Socket, and Cheater Bar. Turn the Bolt On the Top Large Pulley with the Wratchet and Cheater Bar. This will Lower the Smaller Pulley So that you will be Able to Remove the Belt. Please Rate My Response! Thanks! P.S. the link below is for the Belt Routing Diagram.
http://www.mvreader.com/multiview/dayco/catalogSearch.php?autoCatalogSearch=1&make=TOYOTA&model=TACOMA&year=2006&year_from=&year_to=&engine=All&l=n

SOURCE: diagram 2003 toyota rav4 serpitine belt routing

http://www.autozone.com/autozone/repairinfo/repairguide/repairGuideContent.jsp?partName=Engine+Mechanical&pageId=0900c1528019c35b&partId=0900c1528019c35b

go here i think this will help

SOURCE: how to find timing belts marks toyota rav4 2l

I have just replaced my water pump on my 1998 RAVE4, also, the timing belt and the other two belts. I had a tough time with the timing marks. The way you line these marks up is easy if you take the time, First, if you are changing the timing belt you pull the balancer and both top and bottom plastic covers,(do not try to pull top cover off before you take off balencer and the motor mount off or you will just break it.), Second after covers are removed you will have access to the timing belt, you can now remove it by loosening the tensioner bolt and pushing down on the tensioner wheel, the belt then can be taken off. Third take out number one sparkplug and replace the bottom cover by maybe two bolts so that you can see marks on cover, next replace the balancer and bolt. Turn the motor over by hand with the balancer so the small divit on the back of the balancer is on 0 or top dead center on the compression stroke, you can use a compression gauge for this or I just used a mirror and light to shine in the number one cylinder to see the piston. Next remove the balancer and cover and make sure to make a mark on crankshaft gear and housing. Next you will need mirror and flashlight, now turn camshaft gear clockwise to line the hole in the gear with the top timing mark. I recommend a small circle mirror for this. Now replace the belt. I turned the crank shaft gear one tooth counter clockwise off mark and the camshaft one tooth clock wise off mark so when the belt is on you can turn the camshaft gear counter clockwise to get tension on the belt and marks will line up. I would recommend changing water pump,tensioner wheel, and the idler wheel. After belt is on I would replace the bottom cover the balancer and the crankshaft sensor. Iwould then start it to make sure the water pump is not leaking and the motor is not pinging or you will have to tear it back apart again. Good luck and no I am not a certified mechanic just thought this would be helpful from my own experience.

SOURCE: how to change serpentine belt, 2004 Toyota Tundra

locate tensioner pulley; release tension from belt; remove belt; make sure not to forget how the belt is routed; route belt around all pulleys but tensioner; put tension on tensioner pulley; route belt over tensioner pulley