I am not a mechanic but I know you used to have to loosen the alternator bolt to replace the belts. I have a truck that is ten years older and you only use a wrench to pull the pulley over a few inches to replace belts. The 2005 Sentra does not seem so easy. Any help would be appreciated.
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Nissan Sentra/Pulsar/NX 1982-1996 Repair Guide The alternators for Pulsar and Sentra have not changed much over the
years. However, the 1987-88 alternators for Pulsar and Sentra have a
different internal diode assembly.
Disconnect the negative battery terminal.
Disconnect the 2 lead wires and connector from the alternator.
Loosen the drive belt adjusting bolt and remove the belt.
Unscrew the alternator attaching bolts and remove the alternator from the vehicle.
Install the alternator and retaining bolts loosely.
Install the belt and connect the wiring.
Adjust the belt as outlined in
. Torque the retaining bolts to 25 ft. lbs. (34 Nm).
first of all you don't have to loosen the pulley,this will no solve the problem,well you already loosen the adjuster,good,bot thing you have not done i will tell you now,on the power steering pump where the belt pass there is also a bolt that hold it ,you must loosen that also,then after you will see the pump moving on the two position that means you will see the belt loosen on 1 position an d the position it will tight the belt,try that man.............
Using a short socket of appropriate metric value, and a pry bar; Push the pry bar toward the firewall to loosen the tension on the belt. It's not that hard once you buck the initial spiral spring pressure of the tensionor. I have even pryed against the tensionor with a blunt heavy bar and moved it enough to free a belt.
The belt tensioner is located under the timing cover. It is 1 1/2 round and about 3/4 inch with a groove in the middle where a bolt is tightened. When you remove the timing cover you will see the timing belt, the camshaft sprocket and the crankshaft gear. The timing belt goes around these components.. The belt tensioner is loosened and the new timing belt is placed. The sproket also has to be replaced if it is broken. Be careful to notice the little marks that are aligned on the sproket and above the camshaft.. They can be small arrows that have to be aligned exactly the way you took them off. replace the belt and you tighten the tensioner so the belt fits snug and tighten the bolt in the middle of the belt tensioner. It is not too difficult, if you know something about mechanics. If you don't, you will be better of taking it to somebody who does know.