Shredded Belt, 2 Stuck Pulleys and Tensioner
Thread Starter
Newbie
Joined: Dec 2013
Posts: 6
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C300
Shredded Belt, 2 Stuck Pulleys and Tensioner
Hello,
Wife had some problems with her car and after reading the forum, want to make sure I'm straight.
This afternoon, she heard a "weird" sound that she could not describe or remember... [img]file:///bonk.gif[/img]
When getting close to home, the red battery light came on and she lost power steering.
I looked under the hood and the serpentine belt was shredded. Got a new one but there are 2 pulleys that I can't spin (#1, #6 on all the diagrams I've seen) - The (big) vibration damper (crankshaft?) pulley closer to the middle, and the smooth idler pulley (i think this is correct) - it just says "pulley" on the diagram, but it's the small one up top.
Do I also need to replace the tensioner pulley?
Is it common for (2) pulleys to seize up at the same time, and what was likely the cause?
Thanks y'all!
Wife had some problems with her car and after reading the forum, want to make sure I'm straight.
This afternoon, she heard a "weird" sound that she could not describe or remember... [img]file:///bonk.gif[/img]
When getting close to home, the red battery light came on and she lost power steering.
I looked under the hood and the serpentine belt was shredded. Got a new one but there are 2 pulleys that I can't spin (#1, #6 on all the diagrams I've seen) - The (big) vibration damper (crankshaft?) pulley closer to the middle, and the smooth idler pulley (i think this is correct) - it just says "pulley" on the diagram, but it's the small one up top.
Do I also need to replace the tensioner pulley?
Is it common for (2) pulleys to seize up at the same time, and what was likely the cause?
Thanks y'all!
MBWorld Fanatic!
Joined: Oct 2017
Posts: 1,252
Likes: 35
C300 sport 2008
Hello,
Wife had some problems with her car and after reading the forum, want to make sure I'm straight.
This afternoon, she heard a "weird" sound that she could not describe or remember... [img]file:///bonk.gif[/img]
When getting close to home, the red battery light came on and she lost power steering.
I looked under the hood and the serpentine belt was shredded. Got a new one but there are 2 pulleys that I can't spin (#1, #6 on all the diagrams I've seen) - The (big) vibration damper (crankshaft?) pulley closer to the middle, and the smooth idler pulley (i think this is correct) - it just says "pulley" on the diagram, but it's the small one up top.
Do I also need to replace the tensioner pulley?
Is it common for (2) pulleys to seize up at the same time, and what was likely the cause?
Thanks y'all!
Wife had some problems with her car and after reading the forum, want to make sure I'm straight.
This afternoon, she heard a "weird" sound that she could not describe or remember... [img]file:///bonk.gif[/img]
When getting close to home, the red battery light came on and she lost power steering.
I looked under the hood and the serpentine belt was shredded. Got a new one but there are 2 pulleys that I can't spin (#1, #6 on all the diagrams I've seen) - The (big) vibration damper (crankshaft?) pulley closer to the middle, and the smooth idler pulley (i think this is correct) - it just says "pulley" on the diagram, but it's the small one up top.
Do I also need to replace the tensioner pulley?
Is it common for (2) pulleys to seize up at the same time, and what was likely the cause?
Thanks y'all!
Thread Starter
Newbie
Joined: Dec 2013
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C300
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2008 CLK550 Cab
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2008 CLK550 Cab
And you don't necessarily need to replace all the idler pulleys. If they are smooth and quiet, you could let some go for now. Partly depends how many miles you have on the car. If it has 100k, I'd probably do them all just for peace of mind, but at 50k I would only do it if they are noisy or rough.
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Super Member
Joined: Aug 2016
Posts: 520
Likes: 45
From: Regina SK
2008 C-230 4Matic Sport
here are some easy DIY instructions for you. I'd replace both the guide pulleys even if they seem ok. I'd do it all in one shot but that is just me. Only 2 guide pulleys and a tensioner to replace.
https://www.pelicanparts.com/techart...eplacement.htm
https://www.pelicanparts.com/techart...eplacement.htm
https://www.pelicanparts.com/techart...eplacement.htm
https://www.pelicanparts.com/techart...eplacement.htm
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Super Member
Joined: Nov 2008
Posts: 604
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From: SA
2008 C350-Sport-AMG-Active Agility Pack(Not reliable) +Izuzu KB6 3L(It seems Reliable)+Mazda
I replaced belt and the 2x idler pulleyes plus the tentioner unit with pulley & belt.
Note:My pulleys felt ok, but on investigation, I found the small idler pulley making a noise I could only hear when spinning next to my ear. I opended it, and it was bone dry, ready to seize soon. It had about the same minor play as the new one. The other pulleys had zero play and spinned normally, I never the less replaced all 3.
Note:My pulleys felt ok, but on investigation, I found the small idler pulley making a noise I could only hear when spinning next to my ear. I opended it, and it was bone dry, ready to seize soon. It had about the same minor play as the new one. The other pulleys had zero play and spinned normally, I never the less replaced all 3.
