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 10-13-2010, 05:24 AM
Registered User
 
Join Date: Dec 2000
Location: Bridgetown, Nova Scotia
Posts: 574
serpintine belt

where is the tensioner for the belt on a 90 300SEL? I can't seem to find it anywhere. I want to remove the alternator.

Reply With Quote
  #2  
Old 10-13-2010, 06:16 AM
Registered User
 
Join Date: Dec 1999
Location: Utrecht, the Netherlands
Posts: 415
If you just want to remove the alternator it is possible to take the lower bold of the alternator out and flip it up.
That releases all tension from the belt.

Rob
Reply With Quote
  #3  
Old 10-13-2010, 06:47 AM
Registered User
 
Join Date: Dec 2000
Location: Bridgetown, Nova Scotia
Posts: 574
Great thanks! Is there a tensioner on there though?
Reply With Quote
  #4  
Old 10-13-2010, 09:27 AM
Registered User
 
Join Date: Dec 1999
Location: Utrecht, the Netherlands
Posts: 415
The tensioner is on the other side of the engine.
There is a small shock absorber attached to the top of the engine, that shock absorber goes to the tensioner.

To adjust the tensioner you have to release the big bold that goes trough the tensioner first, then adjust with the long nut next to the steering fluid reservoir . Best to soak it first with penetrating oil.

There is a indicator on the front of the tensioner.
Set the indicator to the first mark when the tension is released, with full tension it should be at the 7th mark (if you tensioner is still OK, the rubber tensioning parts do wear out).

Rob
Reply With Quote
  #5  
Old 10-13-2010, 11:34 PM
sptt's Avatar
Registered User
 
Join Date: Sep 2009
Location: Orange County, California
Posts: 691
Great tip on loosening the alternator bolt to get belt loose! I have to do my daughter's water pump tomorrow and I didn't want to remove fan clutch and all...thanks!!!
Reply With Quote
  #6  
Old 10-14-2010, 01:02 AM
Registered User
 
Join Date: Jan 2008
Location: Melbourne Australia
Posts: 844
Best of luck changing your water pump without removing the fan and fan clutch on a M103 engine.
Reply With Quote
  #7  
Old 10-14-2010, 11:28 AM
sptt's Avatar
Registered User
 
Join Date: Sep 2009
Location: Orange County, California
Posts: 691
I know how to get fan clutch off and have done it but why does it need to be done if you can get the belt off another way? Is it in the way somehow? Just curious. The manual doesn't show to remove the fan or clutch:

http://www.w124-zone.com/downloads/MB%20CD/W124/w124CD1/Program/Engine/103/20-2100.pdf
Reply With Quote
  #8  
Old 10-14-2010, 11:03 PM
sptt's Avatar
Registered User
 
Join Date: Sep 2009
Location: Orange County, California
Posts: 691
WOW!!! 5.5 Hours to replace my daughter's waterpump and YES, you have to remove the fan clutch and everything!!! The forum is always right!That was the hardest repair I've ever done myself. I needed to use every tool and angle thingy available. Removed pulleys, tensioner bracket, tensioner, etc. No wonder they want so much money to do that job at the repair shop. I think I can do it in under 3 hours next time though. All of that because of a .20 cent rubber band gasket on the bottom of the pump. I put a new pump in anyway. Total price for parts...$234.00...labor...just my aching back but a great sense of accomplishment.
Reply With Quote
  #9  
Old 10-15-2010, 07:28 PM
Registered User
 
Join Date: Jan 2008
Location: Melbourne Australia
Posts: 844
5.5. hours for your first M103 water pump replacement is not too bad - others have taken 8 hours plus.

That small O ring on the waterpump is a pain
Reply With Quote
  #10  
Old 10-15-2010, 09:12 PM
Registered User
 
Join Date: Oct 2004
Location: Baton Rouge La
Posts: 2,632
i've done it twice....5.5 hours is about right....took me that long the second time too, I think
__________________
1989 300ce 129k
( facelifted front,updated tail lights, lowered suspension,bilstein sports, lorinser front spoiler, MOMO steering wheel, remus exhaust,stainless steel brake lines). (Gone)

1997 s320 154k (what a ride). Sold with 179k miles. Replaced with Hyundai Equus

1994 e320 Cabriolet 108k



1972 280se 4.5 153k Owned for 12 yrs, sorry I sold it


[/SIGPIC]
Reply With Quote
  #11  
Old 10-15-2010, 10:00 PM
Registered User
 
Join Date: Sep 2010
Posts: 1
water pump replacement

You guys must be thoroughly versed in the european mechanics of maintenance. I have a 1992 300 ce that needs a new water pump and after a thorough search of threads and websites, I thought it would be difficult, but not as hard as I am encounerting now. Is there a simple trick to getting the clutch fan off besides trying to locate the small hole behind the pulley. I cannot for the life of me locate it. I was able to squeeze a 10 open end wrench onto one of the pulley bolts, but that did not work. I'm pretty mechanically inclined when it comes to hot rods, but this is extremely frustrating. Any help would be greatly appreciated.
Mike
Reply With Quote
  #12  
Old 10-15-2010, 10:47 PM
sptt's Avatar
Registered User
 
Join Date: Sep 2009
Location: Orange County, California
Posts: 691
My daughter's car didn't need the tool to hold the Fan Clutch pulley from behind. I could hold the belt tight and it loosened up fine. However, on my '91 300E, I had to use a metal rod with a bend in the end (I used a pegboard hanging rod and stuck it in there) and got it nice and jammed in the hole behind the pulley before I could looosen the 8mm Hex Bolt (I think) on the clutch. I also had to buy a flatter wratchet tool that would fit between the the radiator and the clutch for the hex socket. MB makes the tool for this but you can't get it locally at any auto parts store (maybe at MB dealer). Some guys use a long screwdriver and bend the end to make the tool. That hole is there on '91's and later. It was NOT on my daughter's '87! Weird! Those pulley bolts that hold the fan on are almost impossible to get off! i had to get a new fan and clutch because my fan blade was chipped. Let me know if you need anymore help. sptt144@aol.com

Steve
Reply With Quote
  #13  
Old 10-16-2010, 02:42 AM
Registered User
 
Join Date: Jan 2008
Location: Melbourne Australia
Posts: 844
Quote:
Originally Posted by mymotorsport View Post
You guys must be thoroughly versed in the european mechanics of maintenance. I have a 1992 300 ce that needs a new water pump and after a thorough search of threads and websites, I thought it would be difficult, but not as hard as I am encounerting now. Is there a simple trick to getting the clutch fan off besides trying to locate the small hole behind the pulley. I cannot for the life of me locate it. I was able to squeeze a 10 open end wrench onto one of the pulley bolts, but that did not work. I'm pretty mechanically inclined when it comes to hot rods, but this is extremely frustrating. Any help would be greatly appreciated.
Mike
Do you have a 24v or M103?
Reply With Quote
  #14  
Old 10-16-2010, 11:28 AM
sptt's Avatar
Registered User
 
Join Date: Sep 2009
Location: Orange County, California
Posts: 691
M103
Reply With Quote
  #15  
Old 10-17-2010, 08:01 AM
Registered User
 
Join Date: Jan 2008
Location: Melbourne Australia
Posts: 844
What you are aiming for.

Location of pulley on engine

Where to put your holding tool

Use a 7mm allan key and use an extension such as shown

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 05:28 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page