190E 2.3 (201.024) L4-2.3L (102.961) (1984)
Piston: Technical Service Bulletins
Engine - Production Changes
TO:
OUR MERCEDES-BENZ PASSENGER CAR DEALERS
DATE:
December, 1984 REF.NO.. 03/39
SUBJECT:
PISTON-GUIDED CONNECTING RODS
ENGINE 102
FIGURE 1
To limit axial play, the pistons of engine 102.961 now have two thrust bearing surfaces (arrows) at the inner faces of the wrist pin bore (piston-guided
connecting rods). Previously, the axial play was limited at the crankshaft. The connecting rod bearing caps are secured with two screws (1) (previously
with bolts and nuts). The connecting rods are 22 mm wide (dimension "A"). Refer to Figure 1.
Production Phase-In
Model
As of chassis end no.
201.024
A 050914
F 003323
To accomodate the new connecting rods, the oil channelling fins on the oil pan have a curved cut-out to eliminate interference with connecting rods 3
and 4.
FIGURE 2
Repair note