300SD (140.134) L6-3.5L DSL Turbo (603.971) (1993)
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Harmonic Balancer - Crankshaft Pulley: Technical Service Bulletins
Crankshaft Pulley - Modified Bolt
TO: OUR MERCEDES-BENZ PASSENGER CAR DEALERS
DATE: January 1994
REF.NO. 03/48
SUBJECT:
Engines 601, 602, 603
Modified Front Crankshaft Pulley Bolt
Figure 1
As of May 1992 production, the front crankshaft bolt (2, Figure 1) has been modified. The bolt tensile strength rating has been changed from DIN 10.9
to 8.8. Additionally, the three belleville washers have been replaced by a flat washer (3, Figure 1).
Tightening torque:
Preload bolt: 200 Nm
Torque angle: 90°
CAUTION!
The 2 versions of bolts and washers are not interchangeable (i.e. the modified bolt can not be used with the belleville washers, and vice-versa).
Effective Serial Number And Parts Information
