190E 2.3 (201.028) L4-2.3L (102.985) (1987)
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Rocker Arm Assembly: Service and Repair
1.
Remove air cleaner assembly, then the cylinder head cover.
2.
Disconnect electrical connectors from ignition distributor, then turn crankshaft in normal direction of rotation until No. 1 piston is at TDC of
compression stroke.
3.
Mark relationship between camshaft sprocket(s) and timing chain for assembly reference.
4.
Carefully remove cap, seal and compression spring from chain tensioner.
Fig. 1 Automatic level control oil pump bolt location
5.
On models equipped with automatic level control, remove pressure oil pump by loosening bolts indicated by arrows, Fig. 1, then position pump
aside with oil lines connected.
6.
Remove camshaft sprocket attaching bolt and sprocket. On models equipped with automatic level control, the drive sleeve for the pressure oil
pump must also be removed from camshaft.
7.
Fully back out all valve adjusting screws, then disconnect oil line from cylinder head.
8.
Remove rocker arm bearing bracket attaching bolts and the brackets.
9.
On models equipped with hydraulic valve lifters, remove ball sockets.
10.
On all models, remove rocker arm shafts and the rocker arms from brackets.
11.
Reverse procedure to install, noting the following:
a. Torque cylinder head oil line attaching bolts to 15 ft. lbs. (21 Nm) in a crisscross pattern.
b. Install rocker arm bearing brackets so that oil line mountings face rearward, and code numbers on brackets are at the right and aligned with
number cast on cylinder head.
c. On models equipped with hydraulic valve lifters, install bearing bracket No. 1 first, then the camshaft sprocket and brackets No. 3, 4 and 2 in
that order.
d. Install camshaft sprocket with wide flange facing camshaft. Torque sprocket bolt to 59 ft. lbs. (80 Nm).
e. Torque chain tensioner closing nut to 52 ft. lbs. (70 Nm).
f.
On models equipped with automatic level control, torque pressure oil pump bolts to 10 ft. lbs. (13 Nm).
g. Ensure valve timing marks are properly aligned.
