190E 2.6 (201.029) L6-2.6L (103.942) (1987)
Rocker Arm Assembly: Technical Service Bulletins
Camshaft - Updated Replacement Part
TO:
OUR MERCEDES BENZ PASSENGER CAR DEALERS
DATE:
June 1990 (supersedes 05/80, Jan. 1990)
SUBJECT:
CHILLED CAST IRON CAMSHAFT ENGINE M103
REF. NO. 05/80a
Note:
This S.I. contains additional replacement information (first paragraph, page 2 and Parts Information).
As of March 1989, a camshaft made frcm chilled cast iron and rocker arms with carbide inserts are installed in production.
Effective Serial
Model
Engine End Number
Manual
Automatic
124.026
103.940
025793
061591
124.030
103.983
-
149943
124.050
103.983
-
149943
124.090
103.983
-
149943
126.024/025
103.981
-
079773
201.029
103.942
013206
024478
Figure 1
Engine with the chilled cast iron camshaft and rocker arms with carbide inserts are recognizable by the letter "S" stamped onto the exhaust side of the
cylinder head (arrow, Figure 1).
In case of repairs only the chilled cast iron camshaft may be installed.
Figure 2
When installing the chilled cast iron camshaft and rocker arms with carbide inserts into earlier production vehicles, a modified ignition distributor rotor
bracket (11) and T30 M 7x26 torx head screw (16) must also be installed. In vehicles produced prior to 4/86, the camshaft gear (19) and its three