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1982 240d rear brake problems, time to upgrade?
My 1982 240d has been occasionally acting like the right rear brake was dragging for a while now, and it suddenly got worse last week. Last night I tore apart the rear brakes, had to beat both calipers off the rotors they were seized up so bad. Both calipers are shot, the rotors are surprisingly ok. I got to it before the pads ate through to the backing plates. On both the inside pad showed significant wear, the outside pad not so much. The calipers are ATE brand, I'm fairly sure.
The car is sitting up on stands right now and my question is should I be looking to upgrade brakes at this time? My plan was to go through the fronts soon anyway, and I've been hearing about W126 rotors and calipers as a direct swap. Not sure if that's just front or both front and back though. Also, any opinions on pads? I found Wagner makes a ceramic, which I'm inclined to purchase because I appreciate the low dusting and long life of ceramics. Pretty much don't like semi-metalics due to the dusting issues, and organics have pretty short lives and fading issues so that's where I'm at although I could be convinced to change my mind if presented with a good argument otherwise.
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Own: 1970 Mercedes 250c, 1976 International Scout II, 1982 Mercedes 240d, 1997 Honda Accord Wagon, 1998 Acura Integra Type-R, 2009 Mazda5. Owned: 1974 International 100 pickup, 1975 International Scout II, 1981 Mercedes 240d, 1985 Mercedes 300SD, 1988 Honda Accord, 1988 Ford Thunderbird, 1991 Honda Accord, 1996 Geo Metro, 1996 Ford F150, 1996 Dodge Grand Caravan, 1997 Honda Accord, 2003 Acura TL-S, 2003 Yamaha V-star. |
#2
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There isn`t anything on the rear to up grade to. all MB bodies use the same rear brakes more or less. except for the wagons, those are pricy.
you could up grade the rotors to the drilled ones with the lines cut into the face I guess. I would just replace the rears with the stock calipers, rotors, and I guess you could use the ceramic pads for less brake dust. as long as you are replacing parts, would be a good idea to replace the brake hoses as well. the front brakes can be up graded to the W126. the first generation 81 - 85, the 14 inch wheels can be used. second generation W126 86 - 91, then you need to go to a larger wheel, 15 inch or larger. If you have the hub caps, I don`t know if the steel wheels or the light alloy wheels will clear the W126 calipers. Charlie
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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 Last edited by charmalu; 10-07-2011 at 11:17 AM. |
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Cool, thanks Charlie. I didn't realize the rear brakes were the same between them. Any reason to stick with ATE vs Bendix or Girling? I'll definitely replace the fronts with early W126 rotors and calipers if it's a direct swap. I've got a warped rotor up there today, drives me nuts but I figured if I swapped on another solid disk I'd just warp it up as well. Both rear brake lines are new as of one year ago. I'll give them a good inspection though. My wheels are 14-inch bundts.
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Own: 1970 Mercedes 250c, 1976 International Scout II, 1982 Mercedes 240d, 1997 Honda Accord Wagon, 1998 Acura Integra Type-R, 2009 Mazda5. Owned: 1974 International 100 pickup, 1975 International Scout II, 1981 Mercedes 240d, 1985 Mercedes 300SD, 1988 Honda Accord, 1988 Ford Thunderbird, 1991 Honda Accord, 1996 Geo Metro, 1996 Ford F150, 1996 Dodge Grand Caravan, 1997 Honda Accord, 2003 Acura TL-S, 2003 Yamaha V-star. |
#4
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If you change wheel sizes it may affect your speedometer...might take some work to re coordinate that...
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1980 240d , chain elongation, cam marks reference: http://www.peachparts.com/shopforum/diesel-discussion/10414-help-i-need-check-stretch.html http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html evap fin cleaning: http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator A/C thread http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html |
#5
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wheel size only affects odometer readouts if you use the same profile size, if you reduce profile size, to match original outside diameter, no speedometer adjustment is needed!!
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
#6
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Quote:
Tire size calculator I've found my 240d is off already anyway. Indicated 70mph is more like 66. It's ok though, my Scout will read 55mph and you're actually doing 62, so it balances out somehow. That's what I'll tell the judge.
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Own: 1970 Mercedes 250c, 1976 International Scout II, 1982 Mercedes 240d, 1997 Honda Accord Wagon, 1998 Acura Integra Type-R, 2009 Mazda5. Owned: 1974 International 100 pickup, 1975 International Scout II, 1981 Mercedes 240d, 1985 Mercedes 300SD, 1988 Honda Accord, 1988 Ford Thunderbird, 1991 Honda Accord, 1996 Geo Metro, 1996 Ford F150, 1996 Dodge Grand Caravan, 1997 Honda Accord, 2003 Acura TL-S, 2003 Yamaha V-star. |
#7
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You might very well have a flaking brake hose. This will happen sometimes where a flake of rubber acts as a one way brake valve. The hoses are cheap and it would be a good idea to replace them every 15 years or so. Do it at a time when you're opening up the hydraulics for some other reason.
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2001 SLK 320 six speed manual 2014 Porsche Cayenne six speed manual Annoy a Liberal, Read the Constitution |
#8
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Got the brakes swapped out today. Two new calipers, cardone remans. I've read some folks are unhappy with their quality, but at the very least both have a Merc logo filed down on them, so I'd guess they started life as genuine MB calipers. Strangely the bleeder valves between them are different. One is a 8mm and the other 9mm. Don't know what's up with that. I had a hell of a time bleeding them too. Mityvac couldn't pull them down for some reason. I had to get the wife to pump the pedal down to get the air out. Brakes work real nice now, better than I've ever seen in fact. Very happy with the Wagner ceramics as well. Can't wait to go through the fronts now.
I think I'll keep the originals and rebuild them myself, for fun and learning. Anyone here ever do that themself?
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Own: 1970 Mercedes 250c, 1976 International Scout II, 1982 Mercedes 240d, 1997 Honda Accord Wagon, 1998 Acura Integra Type-R, 2009 Mazda5. Owned: 1974 International 100 pickup, 1975 International Scout II, 1981 Mercedes 240d, 1985 Mercedes 300SD, 1988 Honda Accord, 1988 Ford Thunderbird, 1991 Honda Accord, 1996 Geo Metro, 1996 Ford F150, 1996 Dodge Grand Caravan, 1997 Honda Accord, 2003 Acura TL-S, 2003 Yamaha V-star. |
#9
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did you change the rubber hoses?
oh, and vacuum to bleed brakes is never a good idea, nearly always just sucks air out the bleed screws...
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
#10
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Quote:
I just bought the Mityvac since I couldn't find my cheapo bleeder. Guess it was a bit unnecessary if you can't vacuum down brakes.. Oh well I guess now I can finally chase down the chassis vacuum leaks. Locks don't work etc...
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Own: 1970 Mercedes 250c, 1976 International Scout II, 1982 Mercedes 240d, 1997 Honda Accord Wagon, 1998 Acura Integra Type-R, 2009 Mazda5. Owned: 1974 International 100 pickup, 1975 International Scout II, 1981 Mercedes 240d, 1985 Mercedes 300SD, 1988 Honda Accord, 1988 Ford Thunderbird, 1991 Honda Accord, 1996 Geo Metro, 1996 Ford F150, 1996 Dodge Grand Caravan, 1997 Honda Accord, 2003 Acura TL-S, 2003 Yamaha V-star. |
#11
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Your wife pumping the brakes did a better job anyway...lots of discussion in the past about gravity,air rising, force of cleanout , etc... you should be ' good to go ' now...
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1980 240d , chain elongation, cam marks reference: http://www.peachparts.com/shopforum/showthread.php?threadid=10414 http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html evap fin cleaning: http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator A/C thread http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html |
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