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 11-05-2006, 06:45 PM
Registered User
 
Join Date: Aug 2006
Location: London, Ontario, Canada
Posts: 543
Possible problem with 85 300 SD, I'd appreciate inputs.

Hello Everyone, I'd love your input on this potential problem.

In my 85 SEL, (which has an 83 SD motor), When Im driving at 60 mph or so, and I take my foot of the throttle, the car slows down very slowly,

in my 85 SD, and im driving at 60 and I take my foot of the throttle it slows down really quickly, much faster than the SDL,

So the question is which one is working correctly... From what I know about diesels I would get that the SDL is working correctly, and there is something wrong with the SD, My worst case scenario (in my mind) suggests that turbo on the 300 SD, is causing a drag on the motor,

I would love your inputs.

thanks.
__________________
1984 Euro 300SDC, (4spd standard)
1986 Toyota Landcruiser Diesel HJ60 5spd X2

Gone but not forgotten (some sold, some stripped)
1983 300 SD, 1985 300 SD, 1983 240D, 1986 300 SDL, 1985 300 SDL, 1983 300 D, 1984 300 D, 1985 300SD, 1987 300 SDL, 1983 300 SD, 1985 300 TD Euro, 1983 380SEC, 1990 300 D, 1987 300D, 1982 300D, 1982 300D, 1994 E420, 1987 300 TD, 1987 300 D, 1984 300 D

Last edited by Brian Carlton; 11-06-2006 at 06:08 PM.
Reply With Quote
  #2  
Old 11-05-2006, 06:51 PM
ForcedInduction
Guest
 
Posts: n/a
I'd bet $100 the SEL has a higher ratio rear end vs the SD.

From AdSitCo:
380,500,560SEL : RATIO 1:2.47 ABS
300SD 85 : RATIO 1:2.88 ABS

Higher ratio means the engine turns slower at a given speed and less engine braking effect.
Reply With Quote
  #3  
Old 11-05-2006, 06:54 PM
pawoSD's Avatar
Dieselsüchtiger
 
Join Date: Oct 2004
Location: Grand Rapids, MI
Posts: 14,885
Turbos can't create drag on the engine, my bets are on the higher rear end in the "SDL" as well.
__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 69k - mine - (OC-75,000)
'89 420SEL 164k - mine (OC-167,000)
'93 190D 2.2 - 226k - mine (OC-228,700)
'01 E320 Wagon - 156k - mine (OC-160,000)
'17 Metris(VITO!) - 3k - wifes (OC-13k)
'01 E320 - 165k - Dad's (OC-165,500)
'07 E350 Wagon - 120k - dad's (OC-121,500)
'01 SL500 - 43k - dad's (OC-47,000)
'09 E350 4matic Sedan - 102k - Brothers (OC-104,500)
Reply With Quote
  #4  
Old 11-05-2006, 06:55 PM
BenzDieselTuner's Avatar
Großmeister, OBK #7
 
Join Date: Aug 2005
Location: Southwestern Germany / Southwest Florida
Posts: 301
i too think it has to do with the gear ratio, thats what it sounds like

nothing is "broken" on ur car....
__________________
-Justin

I believe in extreme automotive perfection whenever possible.......there is no such thing as "It doesn't matter" !!!

1985 300 CDT - 287k miles

1980 240 D - 340k miles

With extras !!

http://facebook.com/BenzDieselTuner

http://facebook.com/SWFLAlternativeFuelsClub

http://facebook.com/SWFLBenzClub

http://SWFLBenzClub.com
Reply With Quote
  #5  
Old 11-05-2006, 06:57 PM
Registered User
 
Join Date: Aug 2006
Location: London, Ontario, Canada
Posts: 543
Thanks guys, yeah you are probably right, definitly right about the rear end having different gears, just for curiosity what would be the symptoms of a dead turbo, would the car be a real dog to drive?
__________________
1984 Euro 300SDC, (4spd standard)
1986 Toyota Landcruiser Diesel HJ60 5spd X2

Gone but not forgotten (some sold, some stripped)
1983 300 SD, 1985 300 SD, 1983 240D, 1986 300 SDL, 1985 300 SDL, 1983 300 D, 1984 300 D, 1985 300SD, 1987 300 SDL, 1983 300 SD, 1985 300 TD Euro, 1983 380SEC, 1990 300 D, 1987 300D, 1982 300D, 1982 300D, 1994 E420, 1987 300 TD, 1987 300 D, 1984 300 D
Reply With Quote
  #6  
Old 11-05-2006, 07:08 PM
benzforlife's Avatar
Registered User
 
Join Date: Mar 2006
Location: eastern shore,MD
Posts: 347
dead turbo= heavy smoke, slow as hell, no turbo sounds"not good ones at least" and poor fuel economy
__________________
82' 300SD
Reply With Quote
  #7  
Old 11-05-2006, 07:33 PM
Bruce Kennedy's Avatar
Glutton for punishment
 
Join Date: Oct 2006
Location: Cincinnati Ohio
Posts: 230
Check to see if the throttle linkage is hanging up, also make sure the spring is hooked up at the back of the IP.
Reply With Quote
  #8  
Old 11-06-2006, 12:10 AM
Mark Tamburrino
Guest
 
Posts: n/a
"I'd bet $100 the SEL has a higher ratio rear end vs the SD.
From AdSitCo:
380,500,560SEL : RATIO 1:2.47 ABS
300SD 85 : RATIO 1:2.88 ABS"

Mabee when they printed the Adsit catalog this is from they didn't have any SDL rear ends in stock. Mine says the above, and also 300SDL 1:2.88 ABS, so it is the same as an '85 sd. A ratio of 1:2.65 used in the '87 300d would have been better.
Reply With Quote
  #9  
Old 11-06-2006, 09:57 AM
Registered User
 
Join Date: Aug 2006
Location: London, Ontario, Canada
Posts: 543
Quote:
Originally Posted by Mark Tamburrino View Post
"I'd bet $100 the SEL has a higher ratio rear end vs the SD.
From AdSitCo:
380,500,560SEL : RATIO 1:2.47 ABS
300SD 85 : RATIO 1:2.88 ABS"

Mabee when they printed the Adsit catalog this is from they didn't have any SDL rear ends in stock. Mine says the above, and also 300SDL 1:2.88 ABS, so it is the same as an '85 sd. A ratio of 1:2.65 used in the '87 300d would have been better.
Actually Mark, the previous posts were correct, since my "SDL" was really a 500SEL in a previous life, I replaced the V8 with a 83 SD (617), So the car has the higher rear end gearing. I really like the 2.47 rear gearing, car loves it on the highway, I would definitly recommend it to anyone, Also anyone who is planning or doing an swap from Gas to diesel in a w126 can msg me, and ill try to post some helpfull hints.
__________________
1984 Euro 300SDC, (4spd standard)
1986 Toyota Landcruiser Diesel HJ60 5spd X2

Gone but not forgotten (some sold, some stripped)
1983 300 SD, 1985 300 SD, 1983 240D, 1986 300 SDL, 1985 300 SDL, 1983 300 D, 1984 300 D, 1985 300SD, 1987 300 SDL, 1983 300 SD, 1985 300 TD Euro, 1983 380SEC, 1990 300 D, 1987 300D, 1982 300D, 1982 300D, 1994 E420, 1987 300 TD, 1987 300 D, 1984 300 D
Reply With Quote
  #10  
Old 11-06-2006, 11:18 AM
Mark Tamburrino
Guest
 
Posts: n/a
My mistake, I should read more carefully before posting. The rear end ratio is one reason your car is better than a stock SDL, not that it needs to be pointed out. If a 500sel with a blown engine is found nearby, I might be renting a engine hoist and parting the '84 300d.
Reply With Quote
  #11  
Old 11-06-2006, 11:34 AM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,148
maybe check the compression and leak down time. you may have too many miles on the rings in that motor... but the rear gearing is probably the reason. the SDL is also heavier than the SD Yes?
John
__________________
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!
Reply With Quote
  #12  
Old 11-06-2006, 05:32 PM
patbob's Avatar
Its a Whatsit
 
Join Date: Oct 2006
Location: Portland, OR
Posts: 836
brakes?

Quote:
Originally Posted by Icefire View Post
.. in my 85 SD, and im driving at 60 and I take my foot of the throttle it slows down really quickly, much faster than the SDL
Could it be the brakes? That happened to my mom's car (a pinto, I think) many years ago. The car would slow down fairly fast when one took their foot off the acellerator -- faster than one would expect with just coasting. Apparently a caliper had siezed. Car just slowed to a stop one day on the freeway, stranding her. A new caliper or two and it didn't slow like that anymore.. coasted real nice then.

Come to think of it, I dunno why we didn't hear it rubbing. Maybe the winter salt corroded it so fast we couldn't hear it on account of the windows being rolled up and the heater being on full blast all the time.
__________________
'83 300DTurbo http://badges.fuelly.com/images/smallsig-us/318559.png

Broadband: more lies faster.
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 12:10 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, 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