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Cant find drive belt tensioner bolt to loosen serpintine belt

After replacing an altenator, I cant find the drive belt tensioner bolt to allow more slack to easily replace the serpintine belt back over the altenator.

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  • willienance5 May 10, 2009

    Thank you for your help. I will look for this tommorrow.

  • 654baker May 20, 2009

    I can not locate the belt tensioner bolt to loosen the serpentine belt to install a new alternator in a 1993 ford crown victoria. thanks for the help.

  • Anonymous Mar 12, 2014

    how to replace drive belt tensioner


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The serpentine belt tensioner / pulley is on the front of the engine, and part of the belt 'routing'.

Its job is to put tension on the belt as it drives the other devices like the power steering pump, water pump, air conditioning compressor.

It is an aluminum casting that mounts with a single bolt to the engine. The pulley is attached to the arm.

There are a few ways to move / pry the arm inwards, thus releasing the tension on the belt for removing/installing: grab on the pulley bolt (15mm?) with a wrench, or some later models have an opening for a 3/8th socket wrench to attach to directly without a socket.

Posted on May 10, 2009

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Had to purchae the entire tensioner pulley from Ford service center due to the bolt and washer not available at the local auto parts stores. Cost me an extra $16 for the part- bummer - looking for a place to buy just bolt and washer !!

Posted on Mar 28, 2010

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1 Answer

Installed new tensioner for serpintine belt, can't take tension off belt , it will not move in counter clockwise direction like its supose to, why ?

You can look at tensioner and see which way it will turn,with racket,you may have to turn from below.It is a tight fit but bolt doesn't need to be loose.

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Belt tentioner / serpintine belt

Most tensioners have a place to put, in most cases,your 1/2"
long ratchet,so you can pull against the tension & move it,
to get the play you need

Some vehicles will have some other size hole for you to
pull on it

If it is just a bolt that gets loosened,then you don't have it
completely free enough to get the belt on

You should be able to tell looking at it if it is spring loaded
If so you don't loosen any mounting bolts

Look for a square hole not too far from the pulley

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Replace alternator 2008 aveo

disconnect negative battery cable. Then remove rubber boot on altenator. Remove nut and cable attached. Unplug and remove wire harness also attached to altenator.
Loosen and remove both bolts holding on altenator.
Remove altenator.
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Cant get serpintine belt back on altenator

The serpentine belt does not have to be above the pulley. It could very well be below it. So, try setting it below the alternator. Also if the problem is only of setting it then you have to loosen the bolt on the alternator and then tighten it again after adjusting the belt over or under the pulley. The tension adjustment bolt is always there on the alternator.

Oct 03, 2010 | 2004 Ford F350

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Belt drive

do you mean a drive belt? like a serpintine belt? first find the belt tensioner, use a socket that will fit on the bolt. attach a breaker bar to socket. lift tensioner up, when belt loosens slide belt off of one pulley. slowly release tensioner. remove belt. now is the tricky part. install new belt leaving that last pulley for last. use breaker bar again to lift tensioner, slide belt onto last pulley. slowly release tensioner. check all pulleys to make sure belt is on properly. when ready start engine to see if belt will work properly.

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1.Remove the air cleaner outlet tube.
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you will have to loosen the belt first.
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1 Answer

I replaced the alternator on my 2005 Nissan Sentra and now I am not able to get the serpintine belt back on the pulley and then tighten it up

Ok. There should be a tension pulley on the engine that the belt runs through. You can notice it because it is not attached to anything except the engine block or a support bar. You can lift if up or push it down with a wrench or socket and wrench. It moves so it can give you space to put the belt on. After the belt is on, release teh pulley and it will tighten up (tension) your belt and your done.

If by chance you do not have this tension pulley, then you have to only put one bolt in the altenator, put the belt on like normal, pry the altenator in place with the belt on it, then put the last bolt in.

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This is the KIA tech site. Free to register and use. It lists the repair tech manuals, Sevice Bulletins, How-to's, and troubleshooting guides the factory trained repair guys use:

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2 Answers

Serpentine belt

Hey there hardrock,
  • Get a 14mm or 9/16" socket and a long handled ratchet or breaker bar.
  • Get the belt around all the pulleys except the A/C compressor or Alternator.
  • The tensioner pulley is near the Alternator toward the center of the engine. It's on a spring loaded arm. Get your socket on the center nut of this pulley.
  • Slowly pull the ratchet toward the center of the engine. The pulley will pivot on the arm allowing you to get the belt on the final pulley.
  • Slowly release the tension.
  • You're done

Jul 15, 2008 | 1993 Honda Accord

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