Re: [MBZ] Adjusting ALDA
While browsing the site you suggested (
http://www.w124performance.com/images/OM603_injection/ ) I came across the
url http://www.w124performance.com/images/OM603_intake/ where there are
pages showing the EGR and what appears to be the elimination of the EGR.
Has the EGR actually been removed? Is this a procedure that should be
consider under what conditions?
Thanks -
Sincerely,
Larry T ('74 911, '67 MGB, 91 300D Turbo)
A Blood Test for your oil - www.youroil.net
For Test Results http://members.rennlist.com/oil
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- Original Message -
From: Marshall Booth [EMAIL PROTECTED]
To: Mercedes Discussion List [EMAIL PROTECTED]
Sent: Monday, May 15, 2006 4:34 PM
Subject: Re: [MBZ] Adjusting ALDA
[EMAIL PROTECTED] wrote:
I've seen 2 methods for adjusting the ALDA - turning the set screw .5 to
1.5
turns or adding a shim.
Is there a preferred method? Why is one better than the other?
I need to adjust it and want to use the best method - I also plan to
check
the pressure hose and and banjo fitting.
Thanks - BTW, I hope to use the ALDA removal method shown at
http://www.w124performance.com/images/OM603_injection/ where the intake
manifold is left in place.
There is NO really correct way as Mercedes discourages any adjustment
in the field. Still they finally did publish a description in the late
'80s/early 90s (attached) and that might be considered preferred.
It CAN be done on an OM602.96 engine without pulling off the intake
manifold (it just looks impossible).
The screw adjustment (as outlined) is MUCH easier and minor adjustments
a quick and easy. Establishing the correct shim thickness is more of a
challenge.
Marshall
--
Marshall Booth (who doesn't respond to unsigned questions)
der Dieseling Doktor [EMAIL PROTECTED]
'87 300TD 182Kmi, '85 190D 2.0 161Kmi, '87 190D 2.5 turbo 237kmi, '84
190D 2.2 229Kmi (retired)
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Re: [MBZ] Adjusting ALDA
Changing the shim is the correct method, the screw is to adjust the travel of the plunger inside the ALDA, not to set the correct zero point. It isn't possible, I don't believe, to ruputure the diaphram with shim adjustments, but it is definitely possible if you turn the screw too far. Peter
Re: [MBZ] Adjusting ALDA
Marshall wrote:CAN be done on an OM602.96 engine without pulling off the
intake
manifold (it just looks impossible).
Biy Howdy!! Does it ever! I spent 10 minutes planning my attack and it does
look to be *impossible* but the authors (of the above link) comments on
removal taking less than 2 minutes is enough to convince me to try!
Is it better to turn the adjusting screw in 1/2 turn increments? Or should
I go with 1.5 turns and back it down if needed? I believe I read that I'll
get smoke if it's adjusted too far.
BTW, I've searched the manual (on CD) for the EGR photo and location but
couldn't find it. I haven't gone thru all 89 pages of the engine manual but
so far ... the Table of Contents do not list a EGR - but I'll find it.
I did find a mouse nest though - removed the plastic cover behind the
battery and started vacuuming to get some of the tree seeds out - and out
comes a mouse nest from beneath the air intake. I'm sure it came from the
PO in MA.
re my start up problem. It used to only do it when the temp was below - not
it's doing it at 60 and down. Also, it used to only do it when the engine
had sat for 10 or more hours. This morning it stumbled after sitting for
only 2 hours after a 20+ mile drive. It will smooth out pretty quickly -
especially with my foot to the floor -
It seems to me like there might be some kind of cold start device that's not
working properly - or maybe an emissions control device that take a few
seconds to settle down? I've changed the fuel filters twice and used a fuel
conditioner - without any indication I may have an algae problem - and I'm
using a quality fuel station that pumps a lot of fuel to truckers. It may
be fuel related, but it's not a fuel problem - if that makes any sense?
Oh well, I need to keep studying the engine systems schematics - probably
need to spend some time with the electrical schematics also --
Thanks for everyone's help ;-)
Sincerely,
Larry T ('74 911, '67 MGB, 91 300D Turbo, 78 240D (at 285k running
perfectly))
A Blood Test for your oil - www.youroil.net
For Test Results http://members.rennlist.com/oil
Weber Carb Stuff http://members.rennlist.com/webercarbs
http://members.rennlist.com/my_911/Index.htm For my Paint Job Info
- Original Message -
From: Marshall Booth [EMAIL PROTECTED]
To: Mercedes Discussion List [EMAIL PROTECTED]
Sent: Monday, May 15, 2006 4:34 PM
Subject: Re: [MBZ] Adjusting ALDA
[EMAIL PROTECTED] wrote:
I've seen 2 methods for adjusting the ALDA - turning the set screw .5 to
1.5
turns or adding a shim.
Is there a preferred method? Why is one better than the other?
I need to adjust it and want to use the best method - I also plan to
check
the pressure hose and and banjo fitting.
Thanks - BTW, I hope to use the ALDA removal method shown at
http://www.w124performance.com/images/OM603_injection/ where the intake
manifold is left in place.
There is NO really correct way as Mercedes discourages any adjustment
in the field. Still they finally did publish a description in the late
'80s/early 90s (attached) and that might be considered preferred.
It CAN be done on an OM602.96 engine without pulling off the intake
manifold (it just looks impossible).
The screw adjustment (as outlined) is MUCH easier and minor adjustments
a quick and easy. Establishing the correct shim thickness is more of a
challenge.
Marshall
--
Marshall Booth (who doesn't respond to unsigned questions)
der Dieseling Doktor [EMAIL PROTECTED]
'87 300TD 182Kmi, '85 190D 2.0 161Kmi, '87 190D 2.5 turbo 237kmi, '84
190D 2.2 229Kmi (retired)
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[MBZ] Adjusting ALDA
I've seen 2 methods for adjusting the ALDA - turning the set screw .5 to 1.5
turns or adding a shim.
Is there a preferred method? Why is one better than the other?
I need to adjust it and want to use the best method - I also plan to check
the pressure hose and and banjo fitting.
Thanks - BTW, I hope to use the ALDA removal method shown at
http://www.w124performance.com/images/OM603_injection/ where the intake
manifold is left in place.
Sincerely,
Larry T ('74 911, '67 MGB, 91 300D Turbo)
A Blood Test for your oil - www.youroil.net
For Test Results http://members.rennlist.com/oil
Weber Carb Stuff http://members.rennlist.com/webercarbs
http://members.rennlist.com/my_911/Index.htm For my Paint Job Info
Re: [MBZ] Adjusting ALDA
[EMAIL PROTECTED] wrote: I've seen 2 methods for adjusting the ALDA - turning the set screw .5 to 1.5 turns or adding a shim. Is there a preferred method? Why is one better than the other? I need to adjust it and want to use the best method - I also plan to check the pressure hose and and banjo fitting. Adjusting the screw is easier. Adding a shim does not require removing the anti-tamper cap. I've never heard of anyone having problems with an emissions check station noticing the missing cap, but I imagine it could happen. Adding a shim is also helpful if you need more adjustment than the screw can provide. There is no defined end stop but cranking it too far will damage the ALDA.
Re: [MBZ] Adjusting ALDA
Thanks David -
that's *exactly* what I needed to hear about.
I believe my ALDA needs adjusting and wanted to know which was the easiest.
Marshall mentioned I should adjust it shortly after I described some
symptoms I was having. I'm finally getting around to it.
Thanks again --
Sincerely,
Larry T ('74 911, '67 MGB, 91 300D Turbo)
A Blood Test for your oil - www.youroil.net
For Test Results http://members.rennlist.com/oil
Weber Carb Stuff http://members.rennlist.com/webercarbs
http://members.rennlist.com/my_911/Index.htm For my Paint Job Info
- Original Message -
From: David Brodbeck [EMAIL PROTECTED]
To: Mercedes Discussion List [EMAIL PROTECTED]
Sent: Monday, May 15, 2006 3:18 PM
Subject: Re: [MBZ] Adjusting ALDA
[EMAIL PROTECTED] wrote:
I've seen 2 methods for adjusting the ALDA - turning the set screw .5 to
1.5
turns or adding a shim.
Is there a preferred method? Why is one better than the other?
I need to adjust it and want to use the best method - I also plan to
check
the pressure hose and and banjo fitting.
Adjusting the screw is easier. Adding a shim does not require removing
the anti-tamper cap. I've never heard of anyone having problems with an
emissions check station noticing the missing cap, but I imagine it could
happen. Adding a shim is also helpful if you need more adjustment than
the screw can provide. There is no defined end stop but cranking it too
far will damage the ALDA.
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Re: [MBZ] Adjusting ALDA
[EMAIL PROTECTED] wrote: I've seen 2 methods for adjusting the ALDA - turning the set screw .5 to = 1.5 = turns or adding a shim. = Is there a preferred method? Why is one better than the other? I need to adjust it and want to use the best method - I also plan to chec= k = the pressure hose and and banjo fitting. = Thanks - BTW, I hope to use the ALDA removal method shown at = http://www.w124performance.com/images/OM603_injection/ where the intake = manifold is left in place. There is NO really correct way as Mercedes discourages any adjustment = in the field. Still they finally did publish a description in the late = '80s/early 90s (attached) and that might be considered preferred. It CAN be done on an OM602.96 engine without pulling off the intake = manifold (it just looks impossible). The screw adjustment (as outlined) is MUCH easier and minor adjustments = a quick and easy. Establishing the correct shim thickness is more of a = challenge. Marshall -- = Marshall Booth (who doesn't respond to unsigned questions) der Dieseling Doktor [EMAIL PROTECTED] '87 300TD 182Kmi, '85 190D 2.0 161Kmi, '87 190D 2.5 turbo 237kmi, '84 = 190D 2.2 229Kmi (retired) -- next part -- A non-text attachment was scrubbed... Name: ALDA_adj.pdf Type: application/pdf Size: 69965 bytes Desc: not available Url : http://striplin.net/pipermail/mercedes_striplin.net/attachments/20060= 515/aba8eab3/ALDA_adj.pdf
