2.
Connect appropriate pump (pressure at least
0.5 bar) with a hose to the drain valve (ar-
rowed).
3.
Open vent points on intercooler, exhaust tur-
bochargers, and on plate-core heat exchang-
er, see variant 1 (→ Step 3).
4.
Ensure that the valve cover on the expansion
tank is closed.
5.
Pump coolant into engine at 0.5 bar minimum
until air no longer emerges at the vent points.
6.
When coolant escapes at the vent points,
close vent points one by one, proceeding
from the lowest point upwards.
7.
Open valve cover (1) and fill expansion tank
until overflow edge is reached.
8.
Start engine with open expansion tank
(→ Page 72) and operate it in idle mode.
9.
Open the vent points in sequence from bot-
tom to top until air stops emerging, then
close them again.
10.
When coolant temperature is 40 °C (T-Cool-
ant), increase engine speed to 1,000 rpm for
approx. 2 minutes, then reduce engine speed
to idle speed.
11.
With the engine idling, fill expansion tank un-
til overflow edge is reached.
12.
Stop engine (→ Page 85) and remove pump.
13.
With the expansion tank open, start the en-
gine and run it up to nominal speed (full load)
under load.
14.
Leave the engine idling for approx. 5 minutes
until the coolant temperature stabilizes.
15.
Check coolant level in expansion tank:
• Level ≥ 50%: Close valve cover.
• Level ≤ 50%: Stop engine and fill expan-
sion tank until overflow edge is reached.
16.
Close valve cover on expansion tank and run
engine up to full load again.
17.
18.
After the engine has cooled down, fill the ex-
pansion tank until the overflow edge is
reached.
19.
Check proper condition of valve cover and
clean sealing faces if required.
20.
Fit and close valve cover on expansion tank.
Final steps
1.
Start the engine and run it without load for some minutes.
2.
Check coolant level (→ Page 199) and top up engine coolant as required.
MS150046/03E 2018-08
| Coolant System, General, High-Temperature Circuit | 205
TIM-ID: 0000014571 - 005
Содержание 20V4000M73 series
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