Poly V Belt Replacement - Mercedes-Benz Forum
 
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#1 (permalink) Old 07-01-2011, 04:49 PM
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Poly V Belt Replacement

Guys,
I looked all over the site and searched for a procedure for poly V Belt replacement for 2005 E500 4matic wagon and can't find anything. I saw one for a diesel but not the same. Here are my questions:

1) Should I replace the tensioner assembly at 100,000 miles?
2) How do I remove the tensioner assembly? I have the old style "A" per the service manual.
3) How do I release the tension to replace the belt only? If I do not want to replace tensioner assembly.

The service manual shows a tool that looks like it connects to the center of the tensioner pulley. Do I use that to relieve the tension to remove the belt. I tried relieving the tension by holding it with my hand and pulling and could not budge it. Thanks for your help

Jeff.

Jeff
2005 E500S4 Everything except Distronic and Heated Steering Wheel. "87" Porsche 928S4, "87" Porsche 944
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#2 (permalink) Old 07-01-2011, 05:14 PM
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Jeff,
1- Yes, by all means, change the tensioner as well, most belt problems are caused by worn out tensioners, try to get a Gates tensioner from an auto parts store, the one that was in my car was a Gates tensioner with a MB logo and it was identical to the one that I bought from the local auto parts store. You will probably save a lot of money.
2- The old style has a male torx on the pulley, you need a E10 female socket, using a ratchet, rotate counter clockwise and insert a pin or a fat nail to preload the tensioner in the back, if you're not sure how to do this, buy a new tensioner and look in the back to see how it is done. Remove the belt then the 2 bolts holding the tensioner to the engine block.
3- Just follow 2 without removing the tensioner, release the tensioner by rotating it counter clockwise until you're able to remove the pin, then ease it in a clockwise direction.
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#3 (permalink) Old 07-01-2011, 08:29 PM
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[QUOTE=kiblawi1;4788975]Jeff,
2- The old style has a male torx on the pulley, you need a E10 female socket, using a ratchet, rotate counter clockwise and insert a pin or a fat nail to preload the tensioner in the back, if you're not sure how to do this, buy a new tensioner and look in the back to see how it is done. Remove the belt then the 2 bolts holding the tensioner to the engine block.
QUOTE]

If you could look straight at the tensioner pully would the male torx be at 11 oclock or more like in the area of 6 oclock? I see a male torx from up top but it looks like one that secures the tensioner to the block

Thanks

Jeff
2005 E500S4 Everything except Distronic and Heated Steering Wheel. "87" Porsche 928S4, "87" Porsche 944
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#4 (permalink) Old 07-02-2011, 05:14 AM
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If you don't see the torx, then you probably have a new style tensioner with a 17mm nut right next to the pulley, use a 17mm socket and a 1/2 inch ratchet to get leverage and follow the procedure above, if you're not sure; PM me a picture and I'll confirm.
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