300SDL (126.125) L6-3.0L DSL Turbo (603.961) (1987)
Lifter / Lash Adjuster: All Technical Service Bulletins
Noise from Hydraulic Valve Tappets
05-86072
Noise From Hydraulic Valve Tappets for a
Engines 601, 602, 603 Revised 7/87
7/86
Short Time After Starting the Engine
Cause:
Frequent starting and stopping of the engine or after prolonged parking, e.g. overnight causes the hydraulic valve tappets to drain partially and may cause
hydraulic valve tappet noise for a short period after starting the engine.
Remedy:
Install new improved valve tappets, part no. 601 050 80 05 or 050 04 25 which has a 0.2 mm vent hole (in production as of 9/87).