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Oldsmobile Ninety-Eight
VW Jetta
1995-2005 Chevy Cavaliers

If you are attempting to replace the alternator how do you release the belt tensioner on a 1988 Oldsmobile 98?


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Wiki User
2015-07-15 19:39:54
2015-07-15 19:39:54

The alternator is sitting on a guide. It is held on it by a bolt. All you have to do is loosen that bolt and the belt pressure sould realese.

Look around for a wheel that is touching the belt but appears to have no other purpose...this is the tensioner. Use a long handled wrench on the nut in the middle of the tensioner.

there should be a diagram under the hood, in front of the radiator, that will show belt routing and show where the tensioner is...

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You can loosen the tension on your alternator belt by loosening the tensioner bolt. When the tensioner bolt is loose you can slide the alternator to the left.

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Loosen the tensioner pulley. The tensioner pulley will slide to the right. This will loosen the alternator belt. So it can be removed.

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find the tensioner pulley to release the belt. there should be two bolts on the top (one in front, one in rear) and one on the bottom rear ( this one is very tricky to get to).

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There are two serpentine belts a/c timing etc. and alternator just release belt tensioner towards front of motor for outer belt and the secnd tensioner is located on the alternator

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im going on the assumption that you are referring to the belt back on the tensioner cause there is no reason to remove the tensioner to install an alt. if it is a matter of putting the belt on, make sure that the belt is routed correctly through the pulleys. then remove the belt off the alternator, put the belt on the tensioner THEN pull the tensioner back with a wrench on the tensoiner adjusting nut. slip the belt on the alternator and slowly release the wrench. i hope this was helpful


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