Engine - Updated Components: Overview

9233mercedes01

REF. NO. MBNA 05/3b, 18/7b


TO:
OUR MERCEDES-BENZ PASSENGER CAR DEALERS

DATE:
May 1992 (supersedes S.I. MBNA 05/3a, 18/7a, April 1989)


Revision:
Additional information added to topic 2 - Valve Train Noise. W.I. # 222a is still valid, DO NOT DISCARD.

SUBJECT:
ENGINES 102 AND 103
1. ENGINES 102.961/985 AND 103 OIL CONSUMPTION
2. ENGINES 102.961/985 VALVE TRAIN NOISE DUE TO STRETCHED TIMING CHAIN
3. ENGINES 102.961/985 CAMSHAFT AND TIMING CHAIN DRIVE INSPECTION

1. ENGINES 102.961/985 AND 103 OIL CONSUMPTION

In case of customer complaints regarding oil consumption, first verify the complaint with the customer [how frequently (mileage interval) is oil added to the engine]. An oil consumption test is not necessary at this time unless the engine is equipped with new viton valve stem seals (see 1.3).

1.1. Check the engine for external oil leaks around the valve cover, cylinder head, engine block, oil pan, etc. and for correct engine oil level.

Note:
Ensure that the engine oil level is not above, the MAX mark on the, dipstick.

1.2. If no external engine oil leaks can be found, replace valve stem seals with new viton valve seals (SMS Engine 102 Mechanical III and SMS Engine 103 Mechanical II, job no. 05-270). Mark valve cover with a white paint dot after repair.