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Fairly simple. You have to take the tension off the tensioner pulley to get the belt off, then release it when you put the new belt on. You may need a serpentine belt tool to move the tensioner. Sometimes you can use a ratchet and socket if there is enough room. Make sure you have a diagram of the belt configuration before you remove the old belt. There should be a small sticker on the hood or the radiator cover.
Timing belt “B” (balancer belt) and related components—2004–2005 Galant and 2004–2005 Lancer 2.4L engine
Disconnect the negative battery cable. Remove the engine under cover.
Remove the crankshaft damper pulley.
Disconnect the control wiring harness connector, battery wiring harness connector and connector bracket to engine mounting insulator.
Remove the harness bracket. Remove the upper timing belt cover. Remove the water pump pulley. Remove the idler pulley.
Remove the auto tensioner. Remove the lower timing belt cover.
Turn the crankshaft clockwise and align each timing mark to set the number one piston to TDC of its compression stroke.
Remove the timing belt under cover rubber plug and then install special tool MD998738. Screw the special tool until it contacts the timing belt tensioner arm.
The special tool must be screwed in gradually at the rate of a 30 degree turn per second. If it is screwed in all at once, the timing belt tensioner adjuster rod will not easily retract and the tool may bend.
Gradually screw in the special tool and then align the timing belt tensioner adjuster rod set hole “A” with the timing belt tensioner adjuster cylinder set hole “B”.
Insert a wire or pin in the set holes to lock the assembly in place. After removing the special tool, loosen the timing belt tensioner pulley mounting bolts and remove the timing belt. If the belt is being reused be sure to mark the direction of rotation (clockwise) on the belt.
Remove the timing belt tensioner pulley, tensioner arm and adjuster.
Remove the timing belt idler pulley. Remove the timing belt lower cover bracket. Remove the crankshaft position sensor.
Remove the crankshaft pulley center bolt and washer. Remove the drive sprocket. Remove the crankshaft angle sensing blade.
Remove the balancer timing belt tensioner. Remove the timing belt “B” (balancer belt) from its mounting.
Timing belt tensioner adjuster rod set hole “A” and cylinder set hole “B”—2004–2005 Galant and 2004–2005 Lancer 2.4L engine
Belt tension checking—2004–2005 Galant and 2004–2005 Lancer 2.4L engine
Cylinder block plug location—2004–2005 Galant and 2004–2005 Lancer 2.4L engine
Timing belt sprocket alignment—2002–2004–2005 Galant and 2004–2005 Lancer 2.4L engine
Have you attached a socket and bar to the belt tensioner, and released the tension on the belt, which will allow you to slip the belt on? I'm not sure of the exact set up on the Escort, some engines are more difficult than others to get a wrench on the tensioner, you can purchase a special tool if there is not enough room (if you purchase the belt from a parts store, many will loan you the tool). The special tool has a long thin handle for easier access to the bolt, and the long handle provides good leverage to easily move it.
No special tools are required to change the serpentine belt on your Envoy. You just need to lift the belt tensioner from the belt. All that is required is a 1/2" breaker bar and the corrent socket to fit on the tensioner.
if you get a 3/8 in socket wrench there is a square on the belt tensioner u can insert the scoket wrench into you will need a fairly long pipe to help with leverage then pull the wrench up and you will see the tensioner take off the tension off the belt so u can remove the belt but do not forget how the belt is routed this is the fun part ... autozone and kragen have special tools that you can rent to get the other bolts off of the alternator