300SD (140.134) L6-3.5L DSL Turbo (603.971) (1993)
Timing Chain: Customer Interest
Engine - Noise/Runs Rough/Hard Start/No Power
REF. NO. 05/93
TO: ALL MERCEDES-BENZ PASSENGER CAR DEALERS
DATE: November 1995
(supersedes S.I. 05/91, December 1994)
Revision: Engine 606 included.
SUBJECT:
ENGINES 602, 603 AND 606
ENGINE RELATED COMPLAINTS DUE TO STRETCHED TIMING CHAIN
In model 124 equipped with engines 602 and 606; and model 140 equipped with engine 603 built between July 1992 and April 1994, the following
complaints may he the result of a stretched timing chain:
^
Unusual noise from timing chain area
^
Rough running engine
^
Hard start
^
Loss of power
^
Increase in oil consumption
Effective Serial Number Range
The engine must be checked for correct basic timing (crankshaft at 0 ° TDC and camshaft at TDC mark) to determine if the timing chain is stretched.