Import Modifications - The Internets Car Modification Headquarters
2000-04 Toyota Celica
AEM Underdrive Pulley Install

Using the guide provided with the pulley kit pointed us in the right direction when we first undertook the task.  You should do the same when attempting the install yourself.

Simply follow the simple steps listed below to see how we installed the underdrive pulley on our vehicle.  Performance is increased by a large margin and the mod is highly recommended to anytime who wants to get the most out of there Celica.

Installation Instructions

Step 1 - Disconnect the possitive battery terminal with a 10mm wrench.  This is very important when working with the alternator.

Step 2 - Take off the plastic engine covers in the engine bay.  These are held on by a bunch of plastic pop rivets.  Using a small flat head screw driver helps in removal.  This will expose the area of the passenger side of the engine bay where the pulleys and alternator are.

Step 3 - Disconnect all wires connected to the alternator and to the left of it to aid in removal later on.  Some need to be removed with a 12mm wrench.  The rest can be popped off with your hands.

 

Step 4 - Take off the plastic fuel rail cover that is connected to the valve cover to help remove the alternator. 

Step 5 - Using a 3/4 inch wrench you will literally need the power of Zeus to relieve the tension of the tensioner by pulling the wrench towards the front of the car.  Be careful it is on securely.  Pull as hard as you can while a friend pulls the belt off the alternator.


The wrench must be on the area the blue arrow is pointing to.

Step 6 - Take off the four 14mm bolts attached to the top and bottom left side that connect it to the engine block.  Also along the top that uses a metal bracket to secure it to under the very left intake runner.

Step 7 - Now you can work the alternator out of the engine bay.  You will have to unbolt the throttle mechanism in front of it to ease removal from the engine bay.


Unbolt the throttle mechanism to clear room

Step 8 - Remove the stock pulley with the use of an impact wrench or take it to a shop that can replace it for you.  It's very important that the new pulley is put on just as tight as the original.


Note the difference is size of the pulleys

Step 9 - Jack up the front passenger side and place a jack stand under the car in the appropriate place and remove the plastic panels to the center of the car to expose the pulleys and side of the motor we are working on.  Removal of the wheel helps but it isnt necessary.

Step 10 - Place the alternator back in the car in its original location.  And replace the bracket and 14mm bolts.

Step 11 - Replace the original belt with the longer one supplied in the AEM pulley kit.  Be sure to follow the instructions exactly on the sheets provided by AEM.  Replacing the belt the wrong way can result in destruction of the engine.

Step 12 - Pull the tensioner back as hard as possible, while your friends work the belt back over the alternator.

Step 13 - Double check the belt is on each pulley on the side of the motor properly as in the diagram on the installation guide provided.  This is very, very important.

Step 14 - Bolt the throttle mechanism back to the chassis.  Reconnect the wires back to the alternator and other areas close by you may have disconnected to help removal.  Be sure all wires are in there proper locations.

Step 15 - Replace the plastic fuel rail cover to the valve cover.  Replace the + batter terminal wire to the battery and triple check the belt and all wiring.  Replace the plastic panels that attach under the chassis and in the engine bay.

Step 16 - Lower the car off the jack stands.

Step 17 - Start it up!  That should be it.

 

 
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