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

LinkBack Thread Tools Display Modes
Old 07-19-2005, 12:42 AM
guage's Avatar
Join Date: Nov 2003
Posts: 1,146
300SDL 603 Motor RPM's

I have (2) 87 300sdl's
(1) Car has 161,000mi and at 55mph runs @ 2,5000 RPM and gets 23mpg.
(2) Car has 210,000mi and at 62mph runs @ 2,5000 RPM and gets 27mpg.

Is there any adjustment to car (1) that can be made to lower the RPM's
Injection pump timing?

Reply With Quote
Old 07-19-2005, 12:52 AM
pawoSD's Avatar
Join Date: Oct 2004
Location: Grand Rapids, MI
Posts: 15,388
That doesn't seem right....either your speedo isn't accurate on one of them or there is some major slipping going on in the torque converter....does the one with higher rpm at lower speed drive/shift any differently? That massive mpg difference also makes me wonder about the must be slipping....also could be an inaccuracy in the tach's on one or both cars....but the mpg thing makes me think the torque converter is having probs....something is slipping or causing drag....
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 96k - mine - (OC-97,400)
'17 Metris(VITO!) - 20k - wifes (OC-25k)
'01 E320 Wagon - 161k - mine (OC-165,000)
'07 E350 Wagon - 140k - dad's (OC-147,500)
'01 SL500 - 87k(km) - dad's (OC-94,000km)
'16 E400 4matic Sedan - 99k - Brothers (OC-98,500)
Reply With Quote
Old 07-19-2005, 08:38 AM
Join Date: May 2002
Location: Blue Point, NY
Posts: 25,396
I agree. Something seems amiss with the first vehicle. 2,500 rpm's is too high for 55 mph.

It would be nice to rule out a differential that is the wrong ratio, however.

You can jack up one wheel and turn it 10 times. Make a mark on the drive shaft and observe it while turning the wheel and count the revolutions. The drive shaft should make 58 revolutions if the vehicle has the 2.88 axle. It might turn more than this. Report back.
Reply With Quote
Old 07-19-2005, 08:39 AM
guage's Avatar
Join Date: Nov 2003
Posts: 1,146
The car with 161k shifts perfect.
The only problem on car (2) with 210k is the hesitation of 3-4 seconds
when shifting to reverse. I drove it 150mi yesterday and it ran great.
Reply With Quote
Old 07-20-2005, 01:04 AM
t walgamuth's Avatar
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 37,359
the rpm

sounds about right for a 2.65 vs 2.88 diff difference. so do brians thing and check it, i think.

[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


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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Diesel OM 603 Roll Call OhioSDL Diesel Discussion 45 02-25-2005 12:30 PM
EGR and block heater - 603 300sdl daverdla Diesel Discussion 8 10-24-2004 08:59 PM
300SDL Questions & Advice Needed Dervman Diesel Discussion 8 02-03-2004 10:32 PM
300SDL Accelerator P.E.Haiges Diesel Discussion 24 05-14-2003 05:58 PM
FS: 87 300SDL Astral Silver/Blue 243k Recs Lance Allison Mercedes-Benz Used Parts For Sale & Wanted 13 12-06-2001 03:32 PM

All times are GMT -4. The time now is 10:45 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2021, 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