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How do you loosen serpentine belt for removal on a 1993 190E - 26L?
Wiki User
∙ 12y ago
If you take the bottom bolts out of the alternator its will shift about an inch which should give you enough space to take the belt off. Then put the new belt on and have a friend pull the alternator so the holes line up and put the bolts back in. You can also loosen the automatic belt tensioner which will also give you more "play" to remove and install the new belt.
OR
First step is to loosen the tensioner. Loosen the center 17mm bolt first, and then loosen the tensioner adjuster, but be aware that these threads are backwards. This will loosen the belt enough to get it off.
Then, put the new belt on. But if the tensioner is old, be prepared to purchase a new one if you can't get it tightened to the mark on the tensioner. These tensioners get old and lose their springiness inside, and the only visible difference will be the position of the center part. It will be pointing in a different direction. Change the pulley at the same time, as these bearings don't last forever.
Make sure you have the two special tools required to remove the fan. The job will be much easier with the fan removed. One you can make from a stiff wire, and this holds the fan in place with the pulley via two holes that align. The other tool is a very short Allen socket which fits into the center of the fan.
Good luck
John Cacavas
jcacavas@gmail.com
Wiki User
∙ 12y ago
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