Question about 1991 Nissan 300ZX

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Alternator belt apply problem

Hi my name is alex and i own a 91 300zx TT and just recently my fan belt that connects to my alternator broke. I took out the radiator and everything but i can't get the belt to fit over the fan pully and the alternator pulley, even after i loosened the alternator and moved it closer. I know its the rite belt I just can't get it to fit. Is there a specific order I'm supposed to do it in? what do you think?

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  • alexvujovich Jun 20, 2009

    yes i had moved the bracket and even so im still shy by about 3/4 of an inch. im starting to think its the wrong belt but the guy at car quest told me that it's the rite belt. I definately would pick up a manual but im also short on money. also i would use soapy water but its not close enough to even slide on to. :( Any other posible solutions?



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What you do is start from the bottom pulley then work your way to the top pulley with the alternator pulley loosened and moved all the way across and it should go straight on also try some lucricanti.e. soappy water to make it slide on better.

Posted on Jun 20, 2009

  • Nathan Jun 20, 2009

    Take it back then to see if its the wrong belt.


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Look for a decal of some kind for the belts. I take it that your probably have V belts, you mentioned moving the alternator bracket. That's your adjustment so with that all in, it should slip right on. Check and see if there is any other adjustment you can make. If all else fails you can go to a local auto parts store and pickup a manual which I'm positive will have a diagram of some sort in it. Hope this helps!

Posted on Jun 20, 2009

  • Jake
    Jake Jun 20, 2009

    I looked up your car on oreilly auto parts website. It shows 2 belts for the one your replacing, 40398 and 40400. Your probably need the lil bit bigger one lol. Look on your package, Its most likely a different brand, but the numbers will be the same. :)



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The 3.0L and the 3.8L engines utilize a side terminal alternator.

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1. Disconnect the negative battery cable.
2. Loosen the alternator pivot bolt, then remove the adjusting bolt.
3. Remove the alternator drive belt from the drive pulley.
4. Tag and disengage the wiring terminals from the back of the alternator. The stator and the field wiring are the push-on type of retainer. After depressing the lock tab, the connector should be pulled straight off of the terminal to prevent damage.
5. Remove the alternator pivot bolt, then remove the alternator from the engine.
6. Position the alternator on the engine.
7. Install the alternator pivot bolt and the adjusting bolt, but do NOT tighten the bolts until the drive belt it tensioned.
8. Engage the wiring terminals to the alternator, as tagged during removal.
9. Install the drive belt over the alternator drive pulley, then adjust the belt tension using Belt Tension Gauge 021-00019, or equivalent.

When adjusting belt tension, apply pressure on the front housing only.

10. Tighten the adjusting bolt to 30-45 ft. lbs. (41-61 Nm), then tighten the pivot bolt to 50-70 ft. lbs. (68-94 Nm).
11. Connect the negative battery cable.

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  • Loosen the alternator pivot bolt.
  • Remove the bolt that attaches the alternator to the adjustment arm.
  • Rotate the alternator to loosen the drive belt and disengage the belt from the pulley. Be careful that any spacers that are used in mounting are kept with their original bolts. This will make correct reinstallation much easier.
  • While supporting the alternator remove the pivot bolt.
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