Question about 1994 Volkswagen Jetta

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Alternator belt is loose

The alternator belt is loose. How do I tighten it? 94 Jetta diesel.

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I'd say it's the alternator giving out. Or maybe the belt itself is getting worn and stretched so it's not putting enough pressure on the pulley.

Posted on Jun 15, 2008

  • hemant somaiya
    hemant somaiya Jun 15, 2008

    Alternator is an electric generator. It produces alternating current but rectified to DC current. Its like a heart, if anything breaks or anything happens, your car will die and you will be looking at expensive towing charges:(. Maybe you should look for a good quality used one and test it or get a warranty on it. Even junk yards offer 3 weeks or so warranty on some parts sometimes.



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  • hemant somaiya
    hemant somaiya Jun 15, 2008

    keep me updated n rate the solution .thanks for using fixya

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  • Master
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Hi,

Normally, there would be an idler pulley with bracket and spring or along an adjustable lever along the belt. It is held in place by a single central bolt that should be loosened up, adjusted to provide adequate tension to the belt and tightened.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Posted on Jun 15, 2008

  • Louie  Role
    Louie Role Jun 15, 2008

    Hi again,

    This page could give you a fair idea of how it is done. Additionally, if the adjustment has reached its maximum distance and the belt is still loose, then it would be time of course for a replacement.

    If you prefer a more accurate procedure, the Haynes VW Golf & Jetta Service and Repair Manual would be invaluable for any DIYer.

    It is to be noted that some versions of this car (rarely) are without air cons and have a slotted hole on the alternator to adjust the tension on the belt.

    Cheers.


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First of all it need to be replaced..
it cant be tightened..


Posted on Jun 15, 2008

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2000 Ford Truck Expedition 4WD 4.6L EFI 8cyl

Alternator - REMOVAL & INSTALLATION

4.2L Engine

  1. Disconnect the negative battery cable.
  2. Disconnect 2 alternator and voltage regulator electrical harness connectors at the alternator. To disconnect push-on type terminals, depress the lock tab and pull straight off.
  3. Remove the positive battery cable nut and remove the positive battery cable at the alternator.
  4. Rotate the drive belt tensioner away from the drive belt and remove the drive belt from the alternator pulley.
  5. Remove 3 alternator retaining bolts and remove the alternator.
To install:
  1. Place the alternator on the engine and install 3 alternator retaining bolts. Tighten the bolts to 18-22 ft. lbs. (20-30 Nm).
  2. Rotate the drive belt tensioner away from the drive belt and install the drive belt on the alternator pulley.
  3. Connect 2 alternator and voltage regulator electrical harness connectors.
  4. Connect the positive battery cable to the alternator and install the nut and washer. Tighten the nut to 84 inch lbs. (10 Nm).
  5. Connect the negative battery cable.
  6. Start the engine and check for proper charging system operation.
4.6L, 5.4L and 6.8L Engines

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Fig. 1 Detach the connectors from the alternator

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Fig. 2 Remove the nut and the battery cable from the post on the rear of the alternator

6ce39ae.jpg

Fig. 3 Remove the 2 front alternator mounting bolts and ...

45a032e.jpg

Fig. 4 Remove the alternator from the engine by carefully lifting it up and...

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Fig. 5 ... out of the engine compartment
  1. Disconnect the negative battery cable.
  2. Rotate the drive belt tensioner away from the drive belt and remove the drive belt from the alternator pulley.
  3. Detach the electrical harness connectors at the alternator assembly.
  4. Disconnect the positive battery cable and remove the nut and washer.
  5. Remove 2 front alternator bolts.
  6. Remove the rear alternator support bracket retaining bolts and the support bracket.
  7. Remove the alternator from the vehicle.
To install:
  1. Place the alternator in position and loosely install 2 front alternator retaining bolts.
  2. Install the alternator bracket and 3 alternator bracket bolts. Tighten to 84 inch lbs. (10 Nm).
  3. Tighten 2 front alternator retaining bolts to 19 ft. lbs. (26 Nm).
  4. Connect 2 electrical harness connectors to the alternator assembly.
  5. Connect the positive battery cable and install the nut and washer. Tighten the nut to 72 inch lbs. (8 Nm).
  6. Rotate the drive belt tensioner away from the drive belt and install the drive belt on the alternator pulley.
  7. Connect the negative battery cable.
  8. Start the engine and check for proper charging system operation.
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  1. Disconnect the battery ground cable.
  2. Label and detach the connectors from the alternator.
  3. Release the tensioner and remove the drive belt from the alternator pulley.
  4. Remove the alternator retaining bolts.
  5. Remove the alternator from the vehicle.
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  1. Position the alternator and install the retaining bolts. Tighten the retaining bolts to 15-21 ft. lbs. (21-29 Nm).
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I really hope help you with this (remember rated this help) Good luck.

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Alternator belt routing — all except VR6, with power steering, no A/C


  1. Disconnect the negative battery cable.
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  9. Adjust belt tension and tighten the mounting and adjustment bolts as necessary.
  10. Connect the wiring to the alternator. If tape was used to identify the wires, make sure it is removed once the wires are connected.
  11. Connect the negative battery cable.

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REMOVAL & INSTALLATION Fig. 1: A gauge is recommended, but you can check belt tension with thumb pressure 89771g18.gif
Fig. 2: Loosen the component's mounting and adjusting bolts slightly to remove or adjust the belt(s) 89771g19.gif
Fig. 3: Push the component toward the engine and slip off the belt 89771g21.gif
Fig. 4: Slip the new belt over the pulley 89771g22.gif
Fig. 5: Pull outward on the component and tighten the mounting bolts 89771g23.gif
Fig. 6: Accessory mountings found on 6.2L diesel engines 89771g24.gif
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