Is the belt supposed to look like this on the tensioner?
Thread Starter
Junior Member
Joined: Mar 2017
Posts: 23
Likes: 1
2006 6spd C230 Sport
Is the belt supposed to look like this on the tensioner?
I replaced my belt 2 days ago. I noticed today at start up the belt was squeaking a bit which shocked me because the belt is 2 days old. I'm definitely having a issue somewhere because the belt breaks every 6 months. The belt gets shredded on the edge and then the belt slides off. I took a close look at the tensioner and I noticed the belt sticks out the edge of the wheel. I tried adjusting it but soon as I start the car it sticks back out. This looks like it's natural position. Does this look normal cuz I don't think so. I'm thinking maybe the wrong tensioner was installed before I bought the car from my friend. Maybe this is why the belt is shredding on the edge and slides off once there's not enough surface contact.
Here's a pic
This is my old belt that came off 3 days ago.
-Mark
Here's a pic
This is my old belt that came off 3 days ago.
-Mark
Senior Member
Joined: Apr 2016
Posts: 279
Likes: 36
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No! Belt coming off generally means fun times will be had. I'm glad you have no damage.
The belt tensioner should have a part number below the pulley or on the back. Remove it if necessary and check the number, also check idler and guide pulleys.
Tensioner #s: 2722000270 / 2722000070
Idler Pulley #s: 2722021019 / 0002020919 / 0002020019
Guide Pulley #s: 2722021419 / 2722020619 / 2722020419 / 2722020719
The belt tensioner should have a part number below the pulley or on the back. Remove it if necessary and check the number, also check idler and guide pulleys.
Tensioner #s: 2722000270 / 2722000070
Idler Pulley #s: 2722021019 / 0002020919 / 0002020019
Guide Pulley #s: 2722021419 / 2722020619 / 2722020419 / 2722020719
Last edited by shadenfroh; Jun 15, 2017 at 05:20 AM.
Super Member
Joined: Jan 2015
Posts: 920
Likes: 46
From: Worcestershire UK
W124 260E
Mal do you have the right belt for the job ? They go by how many groves that they have in them .If the belt has more groves than the pullys it will be the problem. Just a check in the manual will tell you . Count the groves in the pullys ,then the groves on the belt. And if all is fine with the belt and pullys, then the tensioner is wrong for the engine
