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 05-03-2011, 10:19 PM
Registered User
 
Join Date: Apr 2011
Posts: 46
1987 300D Turbo ALDA adjustment

1987 300D, 215k miles. ALDA cap is intact. plenty of power under boost, can't get out of it's own way at idle.

How the heck are you guys adjusting it in place? I can get to the top of it at all. Black magic?

Please advise.

Thanks.

Reply With Quote
  #2  
Old 05-03-2011, 10:27 PM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,389
Are you starting out in 1st gear?
__________________
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
  #3  
Old 05-03-2011, 10:37 PM
babymog's Avatar
Loose Cannon - No Balls
 
Join Date: Jan 2006
Location: Northeast Indiana
Posts: 10,767
From across the valve cover with a long-sharp Craftsman screwdriver I have managed to twist and sever the metal band around the black plastic cap. Usually this destroys the cap also.

Once the cap is removed, it is as difficult to see and touch the adjustment, spray it first with your favorite penetrant for good juju. Loosen the lock-nut, in some cases the adjustment will turn with it. In such a case, you can stick any small piece of flat metal in to hold the adjustment after loosening the lock-nut and adjustment together 1-1/2 turns CCW, and then turn just the lock-nut back down to snug (don't over-tighten).

I have done this several times on my various 603 and 602 turbo cars. However, it seems less frustrating to buy the $15 intake gasket from NAPA (Victor Reinz brand, next day) and just remove the intake which gives the opportunity to do glow-plugs if necessary, clean the intake of EGR gunk, etc and I doubt that a first-time ALDA adjustment is possible with it on in any less time than it takes to R&R the intake (not including the extra day's worth of "while I'm in there" stuff that will happen as soon as you remove the intake.

It helps to have long, slender, but fairly muscular fingers, a high threshold for pain, and a child nearby so that you can't swear or throw things.
__________________

Gone to the dark side

- Jeff
Reply With Quote
  #4  
Old 05-03-2011, 11:25 PM
Registered User
 
Join Date: Apr 2011
Posts: 120
This thread suggest 6 minutes to remove and replace ALDA with intake on. That is quick
OM603 ALDA removal instructions
Reply With Quote
  #5  
Old 05-04-2011, 12:00 AM
Registered User
 
Join Date: Apr 2011
Posts: 46
Good call. I didn't think of adjusting off the vehicle.
Reply With Quote
  #6  
Old 05-04-2011, 02:34 AM
sjh sjh is offline
Banned
 
Join Date: Oct 2009
Posts: 580
Take a look

This was my first posting from 6 months ago. I don't know why I used some many frames to say what I did but live and learn.

My earlier diesels (115 & 123) had easy access to the the IP and ADA so when I saw the ALDA buried in the 124 I had a challenge.

I can now change my ALDA setting in less than 3 minutes. Hope it helps.

Adjusting the ALDA in a 602 Engine
Reply With Quote
  #7  
Old 05-04-2011, 10:20 AM
babymog's Avatar
Loose Cannon - No Balls
 
Join Date: Jan 2006
Location: Northeast Indiana
Posts: 10,767
Quote:
Originally Posted by woodboat3 View Post
This thread suggest 6 minutes to remove and replace ALDA with intake on. That is quick
OM603 ALDA removal instructions
I've tried to remove the ALDA with everything except the washer-bottle in place, and don't have a large wrench short enough to make it work in a 124. Perhaps if your wrench is shorter, or the hex in the right position to get it started (mine never are), but no luck.
__________________

Gone to the dark side

- Jeff
Reply With Quote
  #8  
Old 05-04-2011, 11:12 AM
Registered User
 
Join Date: Apr 2011
Posts: 46
Quote:
Originally Posted by woodboat3 View Post
This thread suggest 6 minutes to remove and replace ALDA with intake on. That is quick
OM603 ALDA removal instructions
I was able to get it off in like three minutes using this guide.

I adjusted it 1.25 turns CCW and it feels like I'm driving a normal car! It'll even spin the tires, Haha.

No smoke under normal acceleration, just a slight puff under WOT (while performing the wheel spin test).

Thanks again guys!
Reply With Quote
  #9  
Old 05-04-2011, 11:37 AM
Registered User
 
Join Date: Apr 2011
Posts: 120
glad it worked. I might even try it. My 300SDL runs so well right now I was afraid to touch the ALDA.
Reply With Quote
  #10  
Old 05-04-2011, 06:19 PM
Registered User
 
Join Date: Apr 2011
Posts: 46
Quote:
Originally Posted by woodboat3 View Post
glad it worked. I might even try it. My 300SDL runs so well right now I was afraid to touch the ALDA.
If it makes you feel better about it, my 300D ran (still runs) great, I was just tired of putting my foot to the floor to start from at every stop light just to keep up with traffic.

It does just fine now. The only problem is I have to relearn how to drive it, i.e. I only have to stomp the accelerator pedal 1/4 of what I used to take off.
Reply With Quote
  #11  
Old 05-04-2011, 09:09 PM
winmutt's Avatar
85 300D 4spd+tow+h4
 
Join Date: Apr 2006
Location: Atl Gawga
Posts: 9,332
There is no way to take my ALDA off. It seems some people are clocked out far enough to do it. I suppose I could do it by adjusting the pump but I'd just as soon not do that.
__________________
http://superturbodiesel.com/images/sig.04.10.jpg
1987 300D Sturmmachine
1991 300D Nearly Perfect
1994 E320 Cabriolet
1995 E320 Touring
2001 Eurovan FOR SALE
1985 300D car, sold and missed.
OBK #42
Reply With Quote
  #12  
Old 08-18-2012, 11:09 AM
Registered User
 
Join Date: Aug 2012
Posts: 2
ADLA reinstallation?

Hi,

I just bought an 1987 300d. The guy I bought it from had removed the ALDA from the injector pump. Being more interested in fuel economy then power I re-installed the ALDA, however doing so lead to a significant loss of power, more then I find tolerable.

I plan on removing the ALDA for the moment. But long term should I leave the ALDA off? Will this effect fuel economy if I drive conservatively? Will adjusting the ALDA solve the power issues and if so could some one point me in the direction of a guide to adjusting the ALDA. I get the impression that you turn the screw on the top of the ALDA but I'm not sure.

Thanks

Last edited by 33rain; 08-18-2012 at 12:52 PM.
Reply With Quote
  #13  
Old 08-18-2012, 12:34 PM
sixto's Avatar
smoke gets in your eyes
 
Join Date: Jun 2000
Location: SF Bay Area
Posts: 20,801
The ALDA needs a boost signal to function properly. There is a fitting on the intake manifold above the ALDA. A line from that fitting goes to the overboost protection solenoid to the ALDA with a split to the transmission vacuum amplifier. If you post a picture of that section of the engine, we can help you get a boost signal line in place or confirm you hooked it up correctly.

It's possible the previous owner removed the ALDA because it's broken Do you have a MityVac with pressure outlet to see if the ALDA holds about 15 psi? Don't apply vacuum to the ALDA!

Sixto
87 300D
Reply With Quote
  #14  
Old 08-18-2012, 01:00 PM
Registered User
 
Join Date: Aug 2012
Posts: 2
I'm pretty sure I connected the ALDA correctly. The guy I bought it from showed me the lines to reconnect. Perhaps I just needed to hit the accelerator harder then I was expecting when the ALDA was installed.

Unfortunately I do not have a MityVac to test the ALDA.

I have attached an image with the tube I connected to the ALDA circled. I apologize for the image quality.
Attached Thumbnails
1987 300D Turbo ALDA adjustment-5.jpg  


Last edited by 33rain; 08-18-2012 at 01:46 PM.
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 09:46 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, 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