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 > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 01-24-2013, 09:34 PM
DIAMOND CONTRIBUTER
 
Join Date: Feb 2012
Location: Charleston SC
Posts: 188
Brake pads and rotors?!

Just picked up a 1985 300d from the original owner. Great car!

I intend on doing a brake job one weekend as the brakes are pulsing like mad. (Warped rotors)


What pads and rotors do everyone recommend?

I see the forum carries a few different brands.

Thanks guys!
Reply With Quote
  #2  
Old 01-24-2013, 11:31 PM
Diesel911's Avatar
Registered User
 
Join Date: Sep 2007
Location: Long Beach,CA
Posts: 29,592
Did you have the Old Rotors Turned?
__________________
84 300D, 82 Volvo 244Gl Diesel
Reply With Quote
  #3  
Old 01-24-2013, 11:51 PM
DIAMOND CONTRIBUTER
 
Join Date: Feb 2012
Location: Charleston SC
Posts: 188
Quote:
Originally Posted by Diesel911 View Post
Did you have the Old Rotors Turned?
Just bought her today, not sure when brakes were last done
Reply With Quote
  #4  
Old 01-25-2013, 01:04 AM
MBeige's Avatar
Registered User
 
Join Date: Apr 2005
Location: SoCal
Posts: 3,746
Pads = Akebono (dustless, great performance once bedded-in properly)
Rotors = ATE or Balo (standard solid discs, not vented, slotted or drilled)

If you replace the fronts, might as well repack the bearings. You'll need a good breaker bar for the 10mm Allens holding the rotor to the hub.

If you replace the rears, replacement of the discs is straightforward. No need to repack any bearings unlike the fronts. I just did this job a few weeks ago. Very happy with Akebono pads all around and ATE discs (all new). Dustless, quiet, great braking ability once bedded in properly.
Reply With Quote
  #5  
Old 01-25-2013, 01:12 AM
Registered User
 
Join Date: May 2007
Location: Out in the Boonies of Hot, Dry, Dusty, Windy Nevada
Posts: 9,585
Don`t know if you want to stay with the stock brakes or do the upgrade to the W126 Rotors and Calipers. going with this upgrade you will be going from the solid rotors the w123 uses to the vented Rotor the w126 uses.
The pluss of upgrading is it will cool the Rotors and cause less brake fading.

The first generation W126, 81 - 85, you can still use your 14" wheels.

If you go to the 2nd gen w126 Rotors, then you would need to use 15" or larger wheels. the rotors on 1st gen are 11' and 2nd gen 12".

Upgrading w123 with 1st generation w126 brakes

was searching for a few other up grade threads but couldn`t find any, but came across this post by MBDOC

W123->W126 Brake Upgrades, what fits?

Charlie
__________________
there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works
Reply With Quote
  #6  
Old 01-25-2013, 06:12 AM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 34,611
The odds are good that your rear rotors are fine.
__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
Reply With Quote
  #7  
Old 01-25-2013, 01:10 PM
Diesel911's Avatar
Registered User
 
Join Date: Sep 2007
Location: Long Beach,CA
Posts: 29,592
Quote:
Originally Posted by littlehandegan View Post
Just bought her today, not sure when brakes were last done
Sorry I did not read the Post closely.

If there is enough Metal left on the Rotors you could have them turned.

If you want to go new you can istall cheap Rotors and Cheap Pads.

If you are going to use the best Rotors you should get the Better Pads to go with them.

On the Front the Wheel Hubs have to come off to change the Rotors. Look up how to properly set the Wheel Hub End Play/Clearance.
__________________
84 300D, 82 Volvo 244Gl Diesel
Reply With Quote
  #8  
Old 01-25-2013, 02:47 PM
Chief Village Id10t
 
Join Date: Aug 2010
Location: Houston, TX
Posts: 356
Quote:
Originally Posted by Diesel911 View Post
If there is enough Metal left on the Rotors you could have them turned
I though I had read (here somewhere) that Mercedes didn't recommend turning the rotors, but replacing them?

BTW: I did the above-quoted 126 1st generation front brake swap on my 1985 300D KaliKar:
  • New rotors
  • New calipers
  • New pads
  • New bearings
...and except for the fact that I couldn't return my old 123 calipers for the core charge on the 126 calipers (understandable) I have been pleased.
__________________
Mike Frederick
1986 300SDL, 240K+ miles
1985 300D KaliKar, 270K+ miles
Reply With Quote
  #9  
Old 01-25-2013, 03:26 PM
Registered User
 
Join Date: Aug 2007
Posts: 972
Quote:
Originally Posted by mikeyfev1 View Post
I though I had read (here somewhere) that Mercedes didn't recommend turning the rotors...?
The don't recommend against machining rotors, either. As long as rotors are within specifications as far as dimensions and run-out go, it can't reasonably matter how they got there.
Reply With Quote
  #10  
Old 01-25-2013, 05:54 PM
Orv's Avatar
Orv Orv is offline
Registered User
 
Join Date: Mar 2011
Posts: 698
Given that rotors aren't super expensive, I'd have them machined if they seem likely to be within the wear limits, or buy new ones if they seem questionable, have deep grooves, or you don't want to leave the car apart long enough to get the machining done. Machining locally costs about 1/2 what new rotors cost, which is a nice savings but not a huge one.
Reply With Quote
  #11  
Old 01-25-2013, 06:09 PM
Banned
 
Join Date: May 2002
Location: Blue Point, NY
Posts: 25,396
Quote:
Originally Posted by Orv View Post
Given that rotors aren't super expensive, I'd have them machined............
The problem with that approach is the fact that it's almost a certainty that the very low axial runout requirement necessary to prevent vibration on a fixed caliper system won't be maintained by the typical genius who runs a brake lathe.
Reply With Quote
  #12  
Old 01-25-2013, 06:11 PM
Orv's Avatar
Orv Orv is offline
Registered User
 
Join Date: Mar 2011
Posts: 698
Hm, that's a point.

I'm also curious about the W126 brake swap that's been mentioned here. Is there a link to a howto, or at least a description of what's involved?

EDIT: Never mind, there was a link right in the message that mentioned it. Duh.
Reply With Quote
  #13  
Old 01-26-2013, 03:11 PM
pwjeep's Avatar
Registered User
 
Join Date: Aug 2006
Posts: 149
Here are a couple of things I'd suggest:
1) Replace all of the flex brake hoses even if they look ok... They deteriorate from the inside out.
2) Rebuild the calipers... After 28 years and a lack of brake fluid flushes, the amount of "glorp" inside will impact the small passages inside the calipers and will cause uneven or no application of the pads to the braking surface. The caliper rebuild kit includes the appropriate new rubber seals and stuff.
3) Replace the brake fluid in the system by bleeding the brakes until you get clear fluid out of the bleeder nipples.

We did all of this and my car stops on a "dime and gives 9 cents change"!

Don't cheap out on this... You're life, your passengers and potentially anyone who may be contacted by the car with bad brakes is on the line!
__________________
Pete Williams, President emeritus - MBCA-International Stars (Eastern Mich.) Now Wi. & Az.
1985 300D Manual 4 speed Green Hen's tooth
1979 MGB triple black Az car nice
1969 back 1/2 of MGB (Az home built trailer)
1991 Volvo 245 Wagon Nice AZ Restored Gold Brick
1983 Jeep CJ7 37,600 Miles Summer use only
Reply With Quote
  #14  
Old 01-26-2013, 04:40 PM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 34,611
There is nothing wrong with the above advice but the hoses and calipers are extremely long lived. I have owned a bunch of old benzes and seldom change hoses, more often rotors though.

If you do decide to change rotors, calipers and hoses, that is an excellent time to upgrade to the vented rotors. I recommend this upgrade to any one running a wagon with an automatic transmission or just a whole lot of city driving with an automatic. The stickshift cars slow well when you let off the gas so are very easy on brakes if you drive conservatively. If changing front rotors, of course is an excellent time to pack wheel bearings and replace the inner seal.

And the labor involved to remove and replace a rotor will keep me from ever having one turned....unless money was very very tight.
__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
Reply With Quote
  #15  
Old 01-26-2013, 05:40 PM
Stevo's Avatar
Registered User
 
Join Date: Apr 2002
Location: NW WA
Posts: 6,292
A a 39 Studebaker Coupe Express pickup with a 617 and 5 speed, nice, got any more pics?
__________________


1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"
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 01:55 PM.


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