Pagoda SL Group
W113 Pagoda SL Group => General Discussion => Topic started by: n/a on May 15, 2003, 14:53:19
-
A couple of weeks ago, I was able to set the timing exactly as the BBB stated - 8 degs. BTDC. However, I when back to check it the other day after adjusting the fuel/idle air the car was at 27 deg BTDC, then when I unplug the vacuum connection on the manifold and reconnect the vacuum line to the distributor the timing moves to 8 degs BTDC. Am I missing a step or something in the timing process? The BBB states that for 051-distributor timing should be 8 degs BTDC without vacuum. I can only get that with vacuum connected - when I disconnect the vacuum and plug the manifold vacuum line and rotate the distributor to 8 deg. BTDC, then reconnect the vacuum line to distributor the system retards so much that the car stalls. What am I missing - I know it's got to be something simple as it was set the other day!
I'm never touching the idle fuel/air again, this time I mean it!!!!!
Thanks
Scott
1966, Signal Red, 230SL
-
Are you sure your distributor is correct for your engine? I was able to adjust my timing in accordance with the specs without any problem, disconnecting the vacuum line right at the distributor (no plugging the manifold/line). A seemingly-knowledgeable Mercedes mechanic told me last year he fine-tunes the timing simply by listening to the running of the engine ...
white 1969 280 SL
-
On my '64 230SL the owners manual says it cannot be set statically and should read 26deg. before TDC at 3000RPM. It doesn't mention what the setting is at idle. I used a strobe lamp, got someone to sit in the car and hold it at 3000 while I set it.
Thing is the pulley doesn't apear to have an exact mark it shows what I believe to be 20,30 & 40 degrees. I guessed at 26 !
Hope I'm right but the car is driving very well and there is no pre ignition which there was before. I had to readjust the idle settings and recheck the timing a few times to ensure the idle was sweet.
Now it idles at 800 DEAD and pulls like a train ! :)
First time in 2 years its running this good !
Regards,
Ben in Ireland.
'64 230SL 4sp.
-
Scott,
Check your distributor. My guess is its an '046' in which case the '051' settings do not apply.
naj
naj
'Kloines Scheisserle'
65 230SL
68 280SL
-
Hi Scott,
Depending on the engine number of your 230 SL, it's supposed to work with vacuum advance or with vacuum retard, and the vacuum port of the throttle body/manifold has to match with the distributor:
--- 230 SL UP TO ENGINE 10786 (manual 10/20), and 2990 (auto. 12/22):
VACUUM ADVANCE (Vac. port on top of the throttle body - as in the attached photo)
- Distributors (Bosch references): VJUR 6 BR 49, 0231 116 046, 0231 116 050.
Note: Bosch 0231 116 046/050 is now replaced by 0231 185 007, 0227 100 911
--- 230 SL FROM ENGINE 10787 (10/20) and 2991 (12/22):
VACUUM RETARD (Vac. port on the lowest part of the throttle body)
- Distributors (Bosch Ref.): 0231 116 047, 0231 116 051.
Note: Bosch 0231 116 051 was replaced by 0231 185 009
Hope it helps you to check if you have the correct distributor+throttle body for your car.
Best regards,
Download Attachment: (http://images/icon_paperclip.gif) Vacuum advance port.jpg (http://www.sl113.org/forums/uploaded/Albert-230SL/2003519141154_Vacuum%20advance%20port.jpg)
15.45 KB
Albert de la Torre Chavalera
Barcelona (Catalunya/Spain)
Feb.'64 230 SL Euro 113042-10-002432
-
Albert/all:
It appears that I have the correct distributor/engine/throttle body combo. The distributor is an 051, the engine number is 13,945 and the Vac. port is at the lowest part of the throttle body.
A Bosch tech told me recently that the timing should be set at 2 deg BTDC w/o vacuum; not at 8 as stated in the BBB. I can't check it right at the moment as my lady is at the shop having a new soft top put on. Plus, I don't think that could be right as she always stalls when I reconnect the vacuum at anything less than 15 deg BTDC. At this point I'm lost, not sure what to do.
Scott
1966, Signal Red, 230SL
-
Scott,
from the MB Tabellenbuch, edition 1969:
230 SL, 250 SL and 280 SL, through 1969,
with distributors 0 231 116 051; 0 231 301 002; 0 231 301 004; or 001 158 02 01
Installation spec: 8 degrees BTDC at cranking speed, with spark plugs removed and vacuum disconnected.
2 +/- 1 degrees ATDC at idle speed, vacuum connected;
12-19 degrees BTDC at 1500 rpm, vacuum disconnected;
30 degrees BTDC at 3000 rpm, vacuum disconnected.
For those with an 046 distributor, those have different specs, not in the Tabellenbuch.
George Davis
'69 280 SL Euro manual
-
Scott,
I've been thinking! (Yes again!!)
The advance weights inside you distributor may be 'sticking'.
If this happens all the time, maybe you should consider a rebuild.
naj
naj
'Kloines Scheisserle'
65 230SL
68 280SL