Question about 1995 GMC Sierra C1500

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Tensioner on an alternator

I can replace the alternator but cannot get the belt back on. Where is the tensioner?

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  • 253 Answers

The tensioner is on the front of the engine. It will have a pully on it, it will also be spring loaded. It will be on the passenger side and you should find a 3/8 square hole in it to release tension. You can do it with a regular socket wrench. Good Luck

Posted on May 17, 2009

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2 Answers

1998 Isuzu trooper 3.5 alternator replace


step one remove battery neg lug .
the above video (of book?) is wrong.
the belt tension-ing step was skipped.

remove belt steps remove alt. wiring. remove alternator (bolts) it falls free. replace it , reverse steps above belt back tension belt. battery cable back. test run. charge/BAT lamp off?
see wrench below, turn it CW.
this releases the spring tension and belt comes off
to put back, do same and put on belt and release wrench.

25186758-dk3xh54xw1fmpqbxyhqoyzal-4-0.jpg3.5L only. USA only.

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Need to change alternator


loosen tensioner bolt, but do not remove bolt. tensioner will drop down enough to get your belt back on. then lift tensioner back into position it was, re-tighten bolt. belt rides over top of of tensioner smooth pulley, note , sometimes the tensioner wears out and needs replaced, go to rockauto .com for best price. also, have the alternator bolts loosened when putting belt back on , this will help , but remember to re-tighten them after belt is on.

Oct 18, 2012 | 1989 Dodge Dynasty

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Getting alternator back on problems with tension pulley


Do you have the tensioner arm pulled back with the special tool? The tensioner must be full deflected to get the belt on, it is a really heavy spring.

Feb 16, 2012 | 1995 Buick Regal

1 Answer

The serpentine belt on a 2.4L is VERY loose after alternator replacement. Can I tighten it or is the tensioner or belt dead?


I think you are on the right track, suspecting the tensioner. It should spring back after you release it. There is a pretty heavy spring inside, it may have broken.

Nov 21, 2011 | 2000 Chevrolet Cavalier

1 Answer

Remove and replace alternator


you didn't mentioned what type of vehichle or year, but most of these you will have to remove the tension from the belt tensioner, to do so, you will need a 13 - 15" size metric wrench, or 3/8 size ratchet, and a 13- 15" size metric socket , and hold back on to the tensioner towards the drivers side of the engine, this releases the tension from the belt, and then let the serpentine belt lay aside, then disconnect the negative battery cable from your battery, and then disconnect the wiring from the back of the alternator, and remove the hold down bolts that hold the alternator in place, then lift alternator from bolted on area, then install new alternator, plug up wiring at back of it , bolt the alternator back on, and then with a 13 -15 " metric wrench or socket, hold back on to the belt tensioner, and then slip the belt back into position, and release the tensioner slowly against the belt, make sure that the belt is lined up correctly on all of the pulleys, then reconnect the negative battery cable, then start the vehicle up., and check that the belt is operating ok. afterwards, you will most likely have to reset your radio functions , due to the battery cable being disconnected.

Mar 08, 2011 | Jeep Cherokee Cars & Trucks

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Remove and replace alternator


Hello,

Just follow these steps to remove and replace the alternator. You will need this tools, Serpentine belt tool, Battery wrench, Lug wrench, Floor jack, Jack stand, Socket set,

  1. Open the hood, locate the serpentine belt tensioner and move the tensioner off the
    serpentine belt with the serpentine belt tool. Slip the belt off the tensioner
    pulley with your other hand and then slowly move the tensioner back to its normal
    position. You can pinpoint the location of the belt tensioner by following the belt
    routing diagram, printed on the fan shroud.
  2. Disconnect the negative battery cable from the battery with the battery wrench.
    Push the cable end away from the battery so it doesn't make contact during the
    repair.
  3. Turn the lug nuts on the right-front wheel counterclockwise until they're loose
    enough for hand removal, but leave them on for now.
  4. Lift the right-front end with the floor jack and support it on a jack stand placed
    underneath the right-front frame. Remove the lug nuts and right-front wheel by hand
    and set them aside.
  5. Slip the serpentine belt off the alternator pulley by hand. You can access the
    alternator through the wheel well. Unplug the wiring harness from the alternator
    by hand and remove the ground strap with your socket set.
  6. Remove the alternator mounting bolts with your socket set. Lift the alternator out
    of the engine well, through the wheel well. Insert the new alternator in reverse of
    how you removed the old one.
  7. Thread the alternator mounting bolt through the new alternator and into the
    alternator bracket by hand. Tighten the bolts with your socket set.
  8. Attach the alternator ground strap with your socket set. Plug the alternator
    wiring harness in by hand.
  9. Slip the serpentine belt over the new alternator pulley. Reinstall the wheel and
    lug nuts by hand. Lower the Taurus of the jack stand with the floor jack.
  10. Move the belt tensioner aside again and place the belt on the tensioner pulley with
    your free hand. Hold the belt on the pulley and slowly move the tensioner back to
    its normal position. Reconnect the negative battery cable to the battery.
Hope this helps you.
Take care and good luck

Jan 08, 2011 | 2002 Ford Taurus

1 Answer

Replace alternator belt


  • Locate the two belts on the left side (passenger side) of your Mitsubishi Lancer. The outer belt is a serpentine belt, operating four pulleys and the inner belt is your alternator belt.

  • 2

    Follow the serpentine (outer) belt to the three pulleys lined up vertically near the front of the engine compartment. Locate the middle pulley, which is the tension pulley for the belt.

  • 3

    Loosen the bolt on the middle pulley with a socket wrench by turning counter-clockwise. Do not remove the bolt, just turn it a couple of times. Loosen the tensioner bolt on the side of the of the pulley, facing the front of the vehicle.

  • 4

    Remove the serpentine belt and then loosen the bolt on the alternator. With the alternator loose, move it forward so that the alternator belt loosens up and then remove belt from the pulleys.

  • 5

    Install the new alternator belt by placing it over both inside pulleys. Tighten the tension on the alternator belt by moving the alternator back and keeping tension on it by holding it back with a long screwdriver. While the alternator belt is tight, use a socket wrench to tighten up the bolt on the alternator.

  • 6

    Place the serpentine belt back on the pulleys and then use a socket wrench on the bolt on the front of the tension pulley. Once the serpentine belt is tight, tighten up the bolt in the middle of the tension pulley.

  • 7

    Start the Mitsubishi Lancer's engine to test the alternator belt and make sure it is working properly. Once you have verified it is working, turn the engine off.

  • Oct 08, 2010 | 2002 Mitsubishi Lancer

    1 Answer

    How do i loosen the tensioner . to remove the belt to replace the water pump ?


    YOU NEED BELT TENSIONER TOOL OR 3/8 INCH BREAKER BAR PLACE IN THE SQUARE HOLE IN TENSIONER THEN ROTATE BELT TENSIONER COUNTERCLOCKWISE TO RELEASE BELT TENSION SLIP BELT OFF ALTERNATOR.TO GET OFF.SLIP BELT BACK OVER ALTERNATOR WHEN YOU REPLACED WATER PUMP.

    Sep 05, 2010 | 1999 Pontiac Grand Am GT

    1 Answer

    How do I replace an alternator on a 2000 VW Passat 1.8T. How hard is it to replace?


    it isnt that hard actually

    disconect positive battery terminal. and feel the tension on the laternator belt. you will need to bring it back to this tension.

    1.) loosen bolts holding alternator in place (LOOK AT THE BELT TO REMEMBER HOW IT GOES, BEST NOT REMOVE THE BELT.)

    2.) loosen bolts holding wires to alternator and connect wires to new alternator

    3.) Place alternator in engine, replace bolts but dont tighten

    4.) put belt in place, it will be slack, use your tire iron or a piece of pipe or wood to pry the alternator back, to bring tension on the belt. You pry the alternator to pull the belt as TIGHT AS POSSIBLE. while holding strain, on it, tighten the bolts.

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    Jul 22, 2009 | 1983 Chevrolet Celebrity

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