Im trying to find out what size belts do i need for my 1996 nissan sentra

Each fuse box will state the fuse size for each slot usually.

No there shouldn't be any problem with having the fan disconected while starting. The heat switch usualy cold when first starting is in the off possition anyways.

you need an alternator. it failed. have your alternator checked. im pretty sure (99.999999%) that it failed.

This will be a 2 person operation so be ready for this. It works great!!!!
If you have a shop vacuum, turn it on, remove the oil cap and cover the oil cap hole. Have some one under the vehicle and take out the drain plug using a 14mm wrench or suitible tool. Have a drain pan under the hole (oil pan). When ready have the person holding the vacuum remove the hose briefly to drain the oil. When you fill enough has drained then reinstall the plug and check you oil level. If more needs to be drained then repeat above steps till you achive you correct oil level.
besure to always replace drain plug washer/ gasket so you do not create an oil leak.
Hope this helps solve your concern.
Nissan Master

for me i advice to you, but sonny explode,den they have a fit speaker to all panel, and for the sub u want, their is a cheap speaker name TARGA, and amplifiers cheap also, V12 is the model.. if you are near in manila, i can help u to setup your sound, bec, im a sound technician.. just txt me if u wannt 09397527921.. im mark..

Click on the following free direct Link. It has several Diagrams including the correct Serpentine/Drive Belt Diagram for your 1996 Nissan Sentra 1.6L DOHC In-Line 4-Cylinder. Included are Instructional and Directional Diagrams including how to remove/replace your Alternator Belt and set the proper Tension.

http://www.2carpros.com/car_repair_information/year/1996/make/nissan/model/sentra/1996_nissan_sentra_drive_belt_routing_diagram.htm

Let me know if this helped, or if you have additional information questions. Feel Free to contact me at FixYa.com!

1996 Nissan/Datsun Sentra 1.6L SFI DOHC 4cyl

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.

1. Disconnect the negative battery terminal.
2. Disconnect the 2 lead wires and connector from the alternator.
3. Loosen the drive belt adjusting bolt and remove the belt.
4. Unscrew the alternator attaching bolts and remove the alternator from the vehicle.

To install:

1. Install the alternator and retaining bolts loosely.
2. Install the belt and connect the wiring.
3. Adjust the belt as outlined in . Torque the retaining bolts to 25 ft. lbs. (34 Nm).

I hope help you with this (rated this help).

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.

further diagnosis showed that the ingnition switch was fine it turned out to be a faulty 02 sensor that was making the engine run extremely rich, ruining the spark plugs.

it should turn clockwise but be carefull not to put too much stress on it as you may damage the threads