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This may not work for all engines but should work for most. Most engines are the same when it comes to a serpentine belt. There is a series of pulleys. Some are ribbed and some are flat. The belt will go on to match. The ribbed side of the belt will pass across the ribbed pulleys and the flat side against the flat pulleys. It is fairly easy to figure out the outermost pulleys which the belt must go around. Once you have done this you can assess which ones to put the flat side of the belt against.
One of the pulleys is the tension pulley. It is generally on a moving arm and has a spring tensioner. When the belt is off, the arm should move.
When a belt is on the engine you have to release the tension to remove it. This generally requires a fairly large breaker bar or a socket wrench with a cheater pipe to generate enough force to release the tension. There is generally a nut that holds the tension pulley on. If you are loosening the nut when you pull with the breaker bar you are pulling the wrong direction. It takes a good amount of force to loosen the tension on the belt. If you removed the tension pulley as a means of removing the belt you will have to reattach the pulley and then make sure you pull in the correct direction to allow the belt to go over the tension pulley to reinstall.
If you are replacing a broken belt you have to move the tension pulley to allow the belt to slip onto it. Pull the breaker bar to move the pulley. Pulling it far enough allows the belt to easily slip on. Again, if the nut is loosening or you aren't moving the pulley and arm you are pulling the wrong way. It takes quite a force to move the pulley.
Once the belt is on the tension pulley, make sure it is properly sitting on all pulleys and the grooves in the belt match the grooves on the pulleys.
Be careful not to pinch any fingers.
And make sure you don't leave any sockets attached when starting the engine.
You should have a serpentine belt (one continuous multi-grooved belt) on that model in which case the easiest way is to get (or borrow) the special tool (a long bar with a place to install a socket) to back the tensioner off enough to slip the belt off one of the pulleys. Install in the reverse order using the wrench back the tensioner pulley back enough to get the belt over the last pulley then release the tensioner - it will automatically provide the proper tension. If it a single V-belt then look for a bolt or bolts you can loosen and slide the power steering pump toward the motor and remove the old belt then install the new one, carefully pry the pump back into place and tighten the bolt(s). This should work on most vehicles.
Locate the two belts on the left
side (passenger side) of your Mitsubishi Lancer. The outer belt is a
serpentine belt, operating four pulleys and the inner belt is your
Follow the serpentine (outer)
belt to the three pulleys lined up vertically near the front of the
engine compartment. Locate the middle pulley, which is the tension
pulley for the belt.
Loosen the bolt on the middle
pulley with a socket wrench by turning counter-clockwise. Do not remove
the bolt, just turn it a couple of times. Loosen the tensioner bolt on
the side of the of the pulley, facing the front of the vehicle.
Remove the serpentine belt and
then loosen the bolt on the alternator. With the alternator loose, move
it forward so that the alternator belt loosens up and then remove belt
from the pulleys.
Install the new alternator belt
by placing it over both inside pulleys. Tighten the tension on the
alternator belt by moving the alternator back and keeping tension on it
by holding it back with a long screwdriver. While the alternator belt is
tight, use a socket wrench to tighten up the bolt on the alternator.
Place the serpentine belt back
on the pulleys and then use a socket wrench on the bolt on the front of
the tension pulley. Once the serpentine belt is tight, tighten up the
bolt in the middle of the tension pulley.
Start the Mitsubishi Lancer's
engine to test the alternator belt and make sure it is working properly.
Once you have verified it is working, turn the engine off.
Check to ensure the Sienna's engine is cold, then make sure
the Sienna is in park, the ignition is in the off position and the key
is removed from the ignition to prevent any possibility of the engine
engaging during the serpentine belt replacement.
Open the hood and locate the serpentine belt routing diagram
sticker on the side of the engine casing. Study it for a moment before
removing the existing belt. It is essential the new belt be installed
exactly as the diagram indicates.
Find the tensioner pulley, the main pulley that controls the
serpentine belt, and fit a 1/2-inch socket wrench over the
self-tensioner on the outside of the pulley.
Pull the wrench to the left to move the pulley forward, which loosens the belt, then remove the belt.
Compare the old serpentine belt with the new, replacement
belt for length, width and number of grooves on the belt's underside. Be
certain the replacement belt is the right part.
Fit the new belt on to each pulley according to the
serpentine belt routing diagram on the manufacturer's sticker, or
according to the drawing made prior to removing the old belt. Fit the
new belt on to the tensioner pulley last, again applying pressure on the
pulley's self-tensioner with the half-inch socket wrench to loosen the
Release the pressure on the self tensioner and allow the
tensioner pulley to ease back into place, thereby tightening the new
serpentine belt with the appropriate tension.
There should be a diagram attached to the car near where the belt goes showing how the belt is to run through the pulleys. Newer vehicles have a tension pulley which is a pulley on a spring loaded arm that keeps the belt tight.
First run the belt on all the other pulleys and then use a wrench to hold the tension pulley back while you slip the belt on.
Older cars do not have a tension pulley and you had to usually loosen something like the alternator a little bit to get it on.
you can get step by step instructions from a chilton manual. i go to the library, and copy the page or pages i need. libraries have every chilton auto manuals. may have to rent a specialty tool for belt tensioner pulley. can be rented at any parts store, money is returned when tool is. usually 20 bucks. put tool on tension pulley, pull to loosen belt tension, with other hand slip belt off of alternator or easiest pulley to get to. before you take belt off take a mental picture of belt route. when installing new belt remember if pulley is smooth it contacts smooth side of belt.
Except for the 1.8L engine, loosen the pivot and anchor bolts on 1 of the belt's components, then pivot the component sufficiently to release belt tension and remove belt.
For the 1.8L engine, use a 3/8 in. breaker bar or ratchet to pivot the belt tensioner and release the serpentine drive belt, then remove the belt from the pulleys and the vehicle.
Position the belt over the pulleys.
For the 1.8L engine, pivot the tensioner and install the serpentine belt. Make sure the belt is properly aligned in all of the pulley grooves, then gently pivot the tensioner into contact with the belt. Do not allow the tensioner to snap into position or damage could occur.
Except for the 1.8L engine, adjust the belt tension and tighten the accessory mounting bolts.
Serpentine drive belt routing - 1.8L engine
Adjusting the power steering belt - 1992 and 1993 vehicles
look at the pulleys, and locate the tensioner. It's usually in the center of all of the pulleys, and has the belt wrap around it, but isn't an obvious accessory like the alternator, PS pump, water pump, or crankshaft. The tensioner will have a square recess in it, allowing you to put a 3/8" square drive ratchet in it. When you turn it, you will notice that teh belt loosens. When it does, slip it off of the tensioner, but hold it in place for reference. Put the new belt on, routing it exactly like the old one, take out the old one, and load the tensioner exactly like you did when you loosened it. Ensure that the belt ribs are seated in the centers of all pulleys, and you are done.