Parts Catalog Accessories Catalog Tech Info Tech Forums
  Search our site:    
 Cart  | Project List | Order Status | Help    

Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 08-07-2001, 11:46 PM
Posts: n/a
timing for 70 MB250 w/114 engine A/T

I'm starting to get some where with my problem with the great advise I'm getting. So for my Hayne's manual has been out to lunch. My 250 is now running w/Bosch W8DC plugs set @ .028" gap, the dist. points are set @ .017" gap. If someone could advise on the right timing @ what RPM and with what vacuum hoses disconnected etc. The car has an automatic transmission. Thanks in advance. Bob
Reply With Quote
Old 08-08-2001, 08:21 AM
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
Your car is more reliant on timing than almost any other MB due to early emissions attempts with carbureted motors.

They run much better anywhere from 5-10 degrees ahead of factory settings (using hitest gas). Factory settings are a tough answer as their were many combinations of distributors in that era. I presume the original timing would be something like 8deg ATDC with the vacuum lines attached AND WITH vacuum in the retard line. THIS IS CRITICAL. If the vacuum is not there or the vac retard unit is inoperative you will loose ten degrees you can not afford to loose. SO, once you have set it to 3 deg ATDC to 2deg BTDC (5-10 degrees ahead), shut the car off and disconnect the vacuum lines and cap them. Now check it again with the engine idling. You should be around ten degrees higher 7-12deg BTDC.

With the lines still off rev the motor to atleast 3000rpm and verify that the timing advances to at least 30 deg BTDC. Stop the motor and connect the lines and verify that the timing is moved back by the vacuum.

How high you take the timing depends on your driving habits. If you drive in town and do it like an old lady, use the max. If you drive on the hyway a lot at high speed; 70 and above for that vehicle don't do the max.
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Oil Additives Bill Wood Performance Paddock 6 08-24-2011 10:53 AM
190e 16v Timing Chain Cover guide Dan Rotigel Tech Help 1 10-02-2006 07:32 PM
information resources leathermang Diesel Discussion 1 12-11-2003 08:40 PM
M104 Engine - Timing Chain Replacement? tonymb320 Tech Help 11 12-07-2000 11:06 AM
M115 engine timing John Cardenas Tech Help 1 07-28-2000 05:41 PM

All times are GMT -4. The time now is 05:42 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page