300TE (124.090) L6-3.0L (103.983) (1989)
Lifter / Lash Adjuster: All Technical Service Bulletins
Engine - Noisy Valve Lifters
REF. NO. 18/35
To: OUR MERCEDES-BENZ PASSENGER CAR DEALERS
DATE: September 1987
SUBJECT:
OIL RETURN CHECK-TUBE
ENGINE 103
As of December 1986 production, an oil return-flow check-tube (2) with stop collar (arrow) was installed in the cylinder head (Figure 1).
The previous version check-tube did not have a stop collar.
The stop collar prevents the check-tube from being pulled up.
Effective Serial Number
In case of customer complaints regarding noisy valve lifters, even after replacement thereof, on vehicles with a lower chassis end number, it is possible
that the return-flow check-tube may have worked its way loose thereby reducing the oil supply to the hydraulic lifters. In this case the oil return-flow
check-tube with stop collar must be installed after removal of the cylinder head.
Parts Information