Mercedes Benz Truck GL 450 (164.871) V8-4.6L (273.923) Technical Service Bulletin # LI01-30_P-048997 Date: 100303
Engine - Oil Leaks At Back Of Engine
Camshaft caps leaking: Oil loss at rear of engine
Topic number LI01.30-P-048997
Version 4
Design group 01.30 Cylinder head
Date 03-03-2010
Validity All models with engine 272
All models with engine 273
Cleanpoint engine for cap A000 998 5690:
Engine 273: 2739xx30268766
Engine 272: 2729xx31006851
Cleanpoint engine for cap A000 998 5590:
Engine 273: 2739xx30264566
Engine 272: 2729xx30992044
Reason for change Supersedes DTB S-B-01.30/23b
Reason for block
Complaint:
Oil loss at rear of engine.
Note:
In isolated cases oil loss can occur at the rear caps (cover plugs) of the camshafts.
2010-2020 Mercedes Benz Truck GL 450 (164.871) V8-4.6L (273.923) www.168motive.com Page 176
Cause:
Cap sealing ring leaking.
(In the event of borderline tolerances and under unfavorable climatic conditions the sealing ring can lose the preload necessary to seal off the oil
gallery)
Remedy:
Replace cap.
Note:
Replace all 3 or both (on engines with mechanical vacuum pump) caps.
Part number:
A000 998 55 90 (cap, small)
A000 998 56 90 (cap, large)
Symptoms
Parts
Work units
2010-2020 Mercedes Benz Truck GL 450 (164.871) V8-4.6L (273.923) www.168motive.com Page 177
