Mercedes-Benz 201.024 Service Manual page 216

In order to improve camshaft lubrication the oil
feed bore in the cylinder head has been enlarged
from 3 mm to 4 mm (arrow).
The oil groove in the rocker arm bearing support
has also been widened from 4 mm to 5.5 mm
(arrow).
The injection bores in the oil pipe for camshaft
lubrication have a different diameter depending
on position.
A
B
05.0906 - 22017
Oil pipe first design
Oil pipe second design
1
B
EXIT
03.5
0 4