Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 09-22-2008, 10:28 PM
tobybul's Avatar
Registered User
 
Join Date: Sep 2005
Location: West Michigan
Posts: 2,076
Whirling sound - 96 C220

After I put in a reman alternator (from Autozone) I hear a high pitch, whirling sound which I believe is coming from the alternator area (I put on a stetoscope and poked around). I returned this alternator and got another one and its doing the same thing. Now I'm wondering if its the alt or something else.

But my stetoscope tells me it is coming from the alternator area. Could it be that the AZ remans are not done well? Anyone have a similar experience?

__________________
the sooner you start... the sooner you'll get done If it ain't broke, don't fix it.. Its always simpler to tell the truth...
2007 Honda Accord EX
2007 Honda Accord SE V6
96 C220
97 Explorer - Found Another Home
2000 Honda Accord V6 - Found Another Home
85 300D - Found Another Home
84 300D - Found Another Home
80 300TD - Found Another Home
Previous cars:
96 Caravan
87 Camry
84 Cressida
82 Vanagon
80 Fiesta
78 Nova
Ford Cortina
Opel Kadet
68 Kombi
Contessa
Reply With Quote
  #2  
Old 09-22-2008, 10:43 PM
Registered User
 
Join Date: Sep 2004
Location: Seattle
Posts: 1,934
I usually find the stethescope is too loud for bearings. I like to use a long stick and hold one end to my ear. It could be you over tightened the tension of the belt. This is a common problem for beginning mechanics. I am not saying you are a beginner but if you are just make sure you did not tighten it too much. I used to do this until I burned out some bearings and someone told be better. Anyway, you should be able to track down where the noise is coming from. Could be the alternator bearing or some other bearing such as the tensioner pulley. As far as remans, they are often lousy, so I try to buy the best I can find even though it is not the cheapest. A cheap one with a warranty is not very good. It just means if this junky one breaks you can take it off and we will give you the next junky one.
__________________
1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra
Reply With Quote
  #3  
Old 09-23-2008, 09:37 AM
tobybul's Avatar
Registered User
 
Join Date: Sep 2005
Location: West Michigan
Posts: 2,076
Quote:
Originally Posted by mpolli View Post
I usually find the stethescope is too loud for bearings. I like to use a long stick and hold one end to my ear. It could be you over tightened the tension of the belt. This is a common problem for beginning mechanics. I am not saying you are a beginner but if you are just make sure you did not tighten it too much. I used to do this until I burned out some bearings and someone told be better. Anyway, you should be able to track down where the noise is coming from. Could be the alternator bearing or some other bearing such as the tensioner pulley. As far as remans, they are often lousy, so I try to buy the best I can find even though it is not the cheapest. A cheap one with a warranty is not very good. It just means if this junky one breaks you can take it off and we will give you the next junky one.
Thanks for the tips. Actually, the C220 has a self adjusting, spring loaded tensioner. So, aside from pulling it back to loosen the belt, I did not do anything else. I'll try the stick approach. I did put the stets on the tensioner pulley but no noise. However, it was more pronounced around the alternator.

As I said, the noise was not there with the old Bosch alternator.
__________________
the sooner you start... the sooner you'll get done If it ain't broke, don't fix it.. Its always simpler to tell the truth...
2007 Honda Accord EX
2007 Honda Accord SE V6
96 C220
97 Explorer - Found Another Home
2000 Honda Accord V6 - Found Another Home
85 300D - Found Another Home
84 300D - Found Another Home
80 300TD - Found Another Home
Previous cars:
96 Caravan
87 Camry
84 Cressida
82 Vanagon
80 Fiesta
78 Nova
Ford Cortina
Opel Kadet
68 Kombi
Contessa
Reply With Quote
  #4  
Old 09-23-2008, 11:43 AM
Registered User
 
Join Date: Feb 2002
Location: east coast
Posts: 1,255
who took the pulley off the old alternator and placed it on the remanufactured Autozone unit?
Reply With Quote
  #5  
Old 09-23-2008, 06:49 PM
tobybul's Avatar
Registered User
 
Join Date: Sep 2005
Location: West Michigan
Posts: 2,076
Quote:
Originally Posted by Ethan View Post
who took the pulley off the old alternator and placed it on the remanufactured Autozone unit?
I did... I made sure it was back on like it was originally. Theres a washer/spacer that does in b4 the pulley and bolt.... I used my impact wrench at lowest setting to tighten the bolt while holding on to the pulley.

I also tried the stick method but used a long screwdriver instead to find the noise. Definitely coming from the alternator.

I hope you are on to something with the pulley installation. I can't imagine 2 alternators doing the same thing.
__________________
the sooner you start... the sooner you'll get done If it ain't broke, don't fix it.. Its always simpler to tell the truth...
2007 Honda Accord EX
2007 Honda Accord SE V6
96 C220
97 Explorer - Found Another Home
2000 Honda Accord V6 - Found Another Home
85 300D - Found Another Home
84 300D - Found Another Home
80 300TD - Found Another Home
Previous cars:
96 Caravan
87 Camry
84 Cressida
82 Vanagon
80 Fiesta
78 Nova
Ford Cortina
Opel Kadet
68 Kombi
Contessa

Last edited by tobybul; 09-23-2008 at 06:54 PM.
Reply With Quote
  #6  
Old 09-23-2008, 07:52 PM
Registered User
 
Join Date: Sep 2004
Location: Seattle
Posts: 1,934
Screwdriver works good too. Just make sure it is a long one! Don't want to get your head anywhere near any spinning parts...
__________________
1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra
Reply With Quote
  #7  
Old 05-04-2010, 12:11 PM
tobybul's Avatar
Registered User
 
Join Date: Sep 2005
Location: West Michigan
Posts: 2,076
just a follow up on this... i eventually returned the AZ alts and got a bosch reman online which has been in the car for about 2 yrs now. the online reman did not have the noise.

I did contact the AZ supplier/remanufacturer out of CA and told them of the problem. this was after I filled out an online feedback form in the AZ site. they were pretty good at getting back to me to give their supplier info.

__________________
the sooner you start... the sooner you'll get done If it ain't broke, don't fix it.. Its always simpler to tell the truth...
2007 Honda Accord EX
2007 Honda Accord SE V6
96 C220
97 Explorer - Found Another Home
2000 Honda Accord V6 - Found Another Home
85 300D - Found Another Home
84 300D - Found Another Home
80 300TD - Found Another Home
Previous cars:
96 Caravan
87 Camry
84 Cressida
82 Vanagon
80 Fiesta
78 Nova
Ford Cortina
Opel Kadet
68 Kombi
Contessa
Reply With Quote
Reply

Bookmarks

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 03:25 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page