Note:
An empty engine must always filled with cool-
ant from below, i.e. using the drain valve con-
nection of the engine coolant pump.
2.
Connect appropriate pump with hose to drain
valve of engine coolant pump (1).
3.
Open shutoff cock on elbow of engine cool-
ant pump (2) and pump coolant with at least
0.5 bar into engine.
4.
When coolant emerges from the venting
point, close the venting point.
5.
Fill expansion tank until overflow edge is
reached.
6.
Tighten shutoff cock at elbow of engine cool-
ant pump (2) with torque wrench to specified
tightening torque (→ Page 162).
7.
Check proper condition of valve cover on
coolant expansion tank, clean sealing faces if
required.
8.
Fit valve cover and close it.
9.
Start engine (→ Page 48).
10.
After 10 seconds of running the engine with-
out load, shut down the engine (→ Page 53).
11.
Turn valve cover of coolant expansion tank
counterclockwise until the first stop and al-
low pressure to escape.
12.
Continue to turn valve cover counterclock-
wise and remove.
13.
Check coolant level (→ Page 160) and top up
coolant as required:
a) Fill in coolant in expansion tank until the
coolant level at top edge of filler neck re-
mains constant.
b) Fit valve cover and close it.
14.
Repeat the steps from "Start engine"
(→ Step 9) until coolant is no longer needed
to be topped up.
15.
Disconnect pump and hose.
Variant 2: Filling coolant at ex-
pansion tank
1.
Open venting point on distributor (arrow).
166 | Coolant Circuit, General, High-Temperature Circuit | MS15058/04E 2018-12
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