Question about 2007 Mercedes-Benz ML320 CDI
I can not figure out how to get the slack out of the new belt i just replaced the altenator and the belt.
The belt is tensioned with a spring loaded pulley on an arm. To ID this part start the engine and watch the belt go around the pulleys, when you gun the engine the belt tensioner pulley will jitter to adjust the slack.
Posted on Apr 16, 2014
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Posted on Jan 02, 2017
Routing can be a problem, wrong belt can be also as stated before. I had to take replace the idler pulley which i recommend doing when replacing the belt. I routed the belt then placed it into the idler pulley then slid the idler pulley onto the boss that that the idler pulley tightens onto. I thought it was the routing even took the belt back, but when i did the above I was done in 5 minutes after spending an hour an a half.
Posted on May 03, 2009
The tensioner will keep the belt tight without having to adjust. It's on a spring loaded type arm. The tensioner is on a arm, if you look at the center of the roller you will see either a 1/2" hole or it could be a allen type wrench hole. You will need to fit a ratchet into the hole or an allen wrench with a pull handle for better leverage. Once you have this inserted into the hole, you will either push or pull slightly to compress the spring which will give you room to fit the belt over the last pulley. Once this is done the tensioner will automatically tighten the belt once you release the pull handle. You are set and ready to go
Posted on Jul 16, 2010
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