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 06-19-2004, 12:58 PM
Registered User
 
Join Date: Apr 2004
Location: Ojai CA
Posts: 181
WOW! ALDA adjustment makes night and day difference

Just got done ajusting the alda on the beater 300SD, thanks to the helful advice here, didn't want to get into it until I checked other stuff like the valves and timing, and man, could not the believe the change in acceleration. Used to have to be very patient waiting for a big enough gap in traffic to pull out, so it's pretty pleasant to be able to actually get out of the way when someones rolling up on you too fast. So far I'm up to 3/4 turn ccw, might try a little more, but don't want to push it without an EGT guage....So if you have tried everything else and your car is still a dog off the line, try it, you might like it...but maybe have a backup car incase something breaks internally.
__________________
'84 300SD veg-oil bliss
'83 300SD veg-oil beater
Reply With Quote
  #2  
Old 06-19-2004, 02:05 PM
Registered User
 
Join Date: Jun 2001
Location: Denver, Colorado
Posts: 127
yeah i have a question about that too..
i have a 300D 78 and its non turbo... i think on my injector pump there is also an ALDA too...looks like an oldschool service ring bell on a counter top. Do you turn the whole dial? or do you use a flat head screw driver to turn the little pin head on top of that ALDA to make the adjustments...

Also i have a mity vac.... and there is a small tube comming out of that bell looking deal. can i hook up my mity vac to that line and test for pressure that way or do i need an EGR tester?


thanks
Reply With Quote
  #3  
Old 06-19-2004, 03:33 PM
Life is too short!
 
Join Date: Jul 2002
Location: NC
Posts: 26
Re: old schol service bell...

I had a 76 240 D and that Old School Service bell is the filter for the oil reserve I think. If you open it up you will find a cavity that contains oil for the pump lubrication. Use your dip stick to check the oil level inside. There is a drain plug below to drain the diesel fuel out so you can replace the oil.
__________________
Visit my web site and see what it is like living in a Historic town:www.oldsalemhomes.com
Reply With Quote
  #4  
Old 06-19-2004, 03:39 PM
Registered User
 
Join Date: Apr 2004
Location: Ojai CA
Posts: 181
I don't think so, I think he's got an early 123, where the I.P. is lubed by the engine oil, unlike the 115 which does have a seperate oil resevoir, but I think is does have an alda, but I don't know jack about adjusting that type....
__________________
'84 300SD veg-oil bliss
'83 300SD veg-oil beater
Reply With Quote
  #5  
Old 06-19-2004, 04:21 PM
Registered User
 
Join Date: Jun 2001
Location: Denver, Colorado
Posts: 127
soydriver matt:

you are correct on the service bell thingy. On most W123 from 77-83 that are the nono turbo US versions they are lubed with the engine oil from the crankcase. that oldschool bell shape deal is the ALDA if i'm not mistaken that sits on top of that injector pump. anyone know how to adjust this? of if i can use that mity vac to measure correct presure going into that ALDA
Reply With Quote
  #6  
Old 06-19-2004, 05:42 PM
Registered User
 
Join Date: Feb 2004
Location: rio grande valley texas
Posts: 52
I was going to post my own alda question, but I guess I will just chime in here, hope you all don't mind the intrustion. (83 300sd)

I went to adjust my alda, but I found it was turned all the way CCW already, it would not budge anymore. I have been driving it around for some time now with not much in the way of dark exhaust, none at least that can be seen in the daytime, very little at night (headlights). Can this have a detrimental effect on the engine?
I heard also that the EGR can be blocked off to improve the performance further. Anyone have any luck there?
Reply With Quote
  #7  
Old 06-19-2004, 06:50 PM
vwbuge's Avatar
Registered User
 
Join Date: Sep 2001
Location: Johnstown, Pennsylvania
Posts: 2,101
Word of advice: DON'T GET GREEDY. I adjusted mine also and the difference was like night and day. However, there are quite a few here that took it a little too far and had to ante up for a new IP.
__________________
'85 300SD (formerly california emissions)
'02 Jeep Grand Cherokee Limited
'04 VW Passat W8 (6spd manual) SOLD!!
'68/'69 Empi Imp body on '65 Beetle pan
'93 Ducati 900 SS
'79 Kawasaki KZ 650
'86 Kawasaki KX 250
'72 Triumph T100R
'70 Yamaha R5 Rat Bike
Reply With Quote
  #8  
Old 06-19-2004, 07:17 PM
Registered User
 
Join Date: Feb 2004
Location: rio grande valley texas
Posts: 52
in my case, I have only had the car a few months and not knowing how long the previous owner has had it cranked it up all the way, would turning it down some be the recomendation here? As mentioned I do not see heavy black exhaust upon heavy acceleration, in fact the only time I really saw anything significant was when an italian tuneup was performed. The car runs great. What are the signs that an IP has gone bad or is being affected? If any.
Reply With Quote
  #9  
Old 06-19-2004, 08:03 PM
wolf_walker's Avatar
Zen And The Art Of Diesel
 
Join Date: Dec 2003
Location: Oklahoma City
Posts: 2,045
The thing that looks like an ALDA on a non-turbo is an altitude adjustment device.

ALDA helped mine out a good bit as well, I think MB had them turned down from the get go for smog and visable smoke reasons.
__________________
One more Radar Lover gone...
1982 VW Caddy diesel 402K 1.9L AAZ
1994 E320 175K
Reply With Quote
  #10  
Old 06-19-2004, 08:08 PM
Registered User
 
Join Date: Jun 2001
Location: Denver, Colorado
Posts: 127
YES! the altitude compesator..so how do you adjust it on a non-turbo 300D?
__________________
1986 300E 200K + 2 years broken odometer
1978 300D 280K + 2 years broken odometer
Reply With Quote
  #11  
Old 06-19-2004, 08:09 PM
Registered User
 
Join Date: Apr 2004
Location: Ojai CA
Posts: 181
I thought thats what the alda does, is adjusts for the changing air mass at altitude...?
__________________
'84 300SD veg-oil bliss
'83 300SD veg-oil beater
Reply With Quote
  #12  
Old 06-20-2004, 12:07 AM
Registered User
 
Join Date: Aug 2002
Location: NE Okla
Posts: 1,104
The altitude compensator on a non-turbo engine only adjusts fuel for altitude differences. On a turbo, the ALDA is primarily there to adjust fuel based on turbo boost. It indeed does also compensate for altitude, but that is not the primary function.
__________________
1961 190Db retired
1968 220D/8 325,000
1983 300D 164,150
Reply With Quote
  #13  
Old 06-20-2004, 01:23 AM
VeeDubTDI
Guest
 
Posts: n/a
It should work the same way as the ALDA for a turbo engine. Less dense air = less fuel (for pollution control), more dense air = more fuel. Try adjusting the flat head screw (the one with a lock-nut on it) counter-clockwise.
Reply With Quote
  #14  
Old 06-20-2004, 01:40 AM
Registered User
 
Join Date: Jun 2001
Location: Denver, Colorado
Posts: 127
so on my 300D 78...with non turbo engine:turn the fuel compensator counter clockwise for more fuel---> hence more smoke???

or is it the other way around?
__________________
1986 300E 200K + 2 years broken odometer
1978 300D 280K + 2 years broken odometer
Reply With Quote
  #15  
Old 06-20-2004, 01:52 AM
VeeDubTDI
Guest
 
Posts: n/a
First off, I don't have a non-turbo engine, nor have I seen one up close recently. Having said that...

Based on your description, and knowing how and why the ALDA does what it does, it would seem that turning up the fuel is done in the same manner as it is on the turbo engine.

Try CCW first. If for some reason it decreases your power, turn it the other way. 1/4 turn at a time for safety.
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 05:44 AM.


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