Mercedes-Benz Owners' Forums  

 

Reply
 
Thread Tools Display Modes
  #1  
Old 20-03-2017, 05:56 PM
MikeG55 MikeG55 is offline
Member
 
Join Date: Sep 2015
Location: March, Cambridgeshire
Car: G55 AMG/2008/5.5 & C32 AMG/2002/3.2
Posts: 17
Default C32 alternator question

Hello all,

About 6 months ago I suffered a pulley collapse on the auxiliary belt which you helpful people helped with.
The car has since been repaired, but has been suffering with a rattle since.

I have managed to locate the rattle, it is the aux belt tensioner moving, today I replaced the tensioner but the rattle is still there.

I checked the tensioner and it is still chattering away.

I have had a quick google of the issue and the general consensus is alternator pulley.

I have read that the pulley only engages in one direction like a bikes rear wheel. I have removed the belt and turned the pulley in both directions, there is no difference in the feel of it.

If you can shed any light on this it would be greatly appreciated.

Last edited by MikeG55; 20-03-2017 at 05:57 PM.
Reply With Quote
  #2  
Old 20-03-2017, 06:30 PM
Rappey69's Avatar
Rappey69 Rappey69 is offline
Senior Member
 
Join Date: Dec 2008
Location: hants
Car: c220 cdi w203
Posts: 1,273
Default

I thought the one way pulley bearing was only for diesels?
Guess i will find out from this thread soon enough .. but when its goosed it certainly makes lots of noise.
__________________
2002 c220 avantgarde .W203
Reply With Quote
  #3  
Old 20-03-2017, 06:49 PM
MikeG55 MikeG55 is offline
Member
Threadstarter
 
Join Date: Sep 2015
Location: March, Cambridgeshire
Car: G55 AMG/2008/5.5 & C32 AMG/2002/3.2
Posts: 17
Default

Everywhere that I have looked hasn't mentioned whether the one way pulley is for petrol or diesel, so I never thought about it.

Just had a look on a couple of parts websites, and it states that it is a clutch or decoupler pulley

Last edited by MikeG55; 20-03-2017 at 06:52 PM.
Reply With Quote
  #4  
Old 20-03-2017, 07:19 PM
MikeG55 MikeG55 is offline
Member
Threadstarter
 
Join Date: Sep 2015
Location: March, Cambridgeshire
Car: G55 AMG/2008/5.5 & C32 AMG/2002/3.2
Posts: 17
Default

Also I forgot to mention I checked the water pump, air con pump and power steering pump pulleys and all seam to move freely.

Has anyone any other ideas?
Reply With Quote
  #5  
Old 20-03-2017, 07:39 PM
Rappey69's Avatar
Rappey69 Rappey69 is offline
Senior Member
 
Join Date: Dec 2008
Location: hants
Car: c220 cdi w203
Posts: 1,273
Default

I presume you've checked the alternator bearings?
It was mainly those that caused all the noise on mine...
__________________
2002 c220 avantgarde .W203
Reply With Quote
  #6  
Old 20-03-2017, 08:04 PM
LostKiwi LostKiwi is offline
Senior Member
 
Join Date: Aug 2006
Location: Midlands, not east or west but middle.
Car: '93 500SL-32, '01 W210 Estate E240, 04 Smart Roadster Coupe
Posts: 3,197
Default

Some info on one way clutches here:
http://www.daycoproducts.com/what-ar...w-do-they-fail
Reply With Quote
The Following User Says Thank You to LostKiwi For This Useful Post:
MikeG55 (20-03-2017)
  #7  
Old 20-03-2017, 08:13 PM
MikeG55 MikeG55 is offline
Member
Threadstarter
 
Join Date: Sep 2015
Location: March, Cambridgeshire
Car: G55 AMG/2008/5.5 & C32 AMG/2002/3.2
Posts: 17
Default

Yep, checked the alternator, its turning silently.
The noise is definitely coming from the tensioner, I have put my hand on it and goes slightly quieter

I am trying to work out what is pulling on the belt to make the tensioner rattle.
I have had a look at some more alternators for my car and it looks like a normal pulley to me.

I am sure not if the alternator doesn't need replacing anyway, I have a voltage display on my stereo, although I don't trust it completely the voltage is does seem to be getting lower and lower on it.
The last time I looked it was 13.7v, I know that is on the low side of acceptable

Last edited by MikeG55; 20-03-2017 at 08:17 PM.
Reply With Quote
  #8  
Old 20-03-2017, 08:17 PM
LostKiwi LostKiwi is offline
Senior Member
 
Join Date: Aug 2006
Location: Midlands, not east or west but middle.
Car: '93 500SL-32, '01 W210 Estate E240, 04 Smart Roadster Coupe
Posts: 3,197
Default

Check every groove in every pulley for any dirt. Any dirt needs to be scraped out. It's not uncommon for old belts to leave bits of rubber in the grooves and the variation in diameter where the dirt is is all you need to create the tensioner noise.
Reply With Quote
  #9  
Old 20-03-2017, 08:20 PM
MikeG55 MikeG55 is offline
Member
Threadstarter
 
Join Date: Sep 2015
Location: March, Cambridgeshire
Car: G55 AMG/2008/5.5 & C32 AMG/2002/3.2
Posts: 17
Default

Thanks lostkiwi,
it will have to wait until the weekend, but I will give it a try.
Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
C32 AMG Cylinder 5 misfire help C32Steve Engine, Drivetrain, Fuel and Exhaust 10 19-02-2015 01:13 PM
C32 AMG estate tow bar? Denrob Bodywork, Tyres, Wheels & Trim 7 21-07-2010 10:03 PM
Mercedes C32 Discs & Pads pouch Suspension, Steering & Brakes 5 03-03-2010 11:58 PM
C32 Estate thoughts marbellapinky General Mercedes-Benz Related Discussion 0 08-12-2007 07:14 PM
C32 Ronnie Adams Engine, Drivetrain, Fuel and Exhaust 8 19-03-2007 09:25 PM


All times are GMT. The time now is 10:44 PM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.