ENGLISCH • Kapitel 6 • Seite 70
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6.3.8 Filling/Venting the Cooling
System
Unit Engine
Unit engine (6 cylinders)
z Open the cap 1 of the expansion tank.
z Place a container beneath sealing plug 2.
z Unscrew the sealing plug 2.
z Drain off coolant.
z In case of clogging, rinse the radiator through
with clear water.
z Tighten sealing plug 2.
Filling/venting the cooling system:
see section 6.3.8
Be careful when draining hot
coolant - danger of scalds!
Collect drained coolant and
dispose of according to envi-
ronmental regulations.
z Open the cap 1 of the expansion tank.
z Slowly add coolant up to the max. marking or
filler limit.
z Close the cap.
z Start the engine and warm up until the thermostat
opens, the upper coolant line warms up tangibly.
z Briefly run the engine at nominal output (fixed
setting), this rinses out any pockets.
z Switch off the engine and leave to cool down.
z Open cap 1, add coolant up to the max.
marking or filler limit and close the cap 1.
z Once the engine has been run once, check the
coolant level when the engine is cold.
If a heater is connected to the cooling
system, the heater valves must be
opened when coolant is added. De-
pending on the coolant contents and the installation
location of the heater, it may be necessary to
repeat the procedure several times.
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© 30 277 0
Service and Maintenance 6.3 Cooling System
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6.3.7 Draining the Cooling System
Unit Engine (4 Cylinders)
z Open the cap 1 of the expansion tank.
z Place a container beneath knurled screw 2.
z Unscrew the knurled screw 2 in an anti-
clockwise direction until coolant is emitted.
z Drain off coolant.
z In case of clogging, rinse the radiator through
with clear water.
z Tighten knurled screw 2.
Filling/venting the cooling system:
see section 6.3.8
9682en_K06.p65 17.11.2008, 12:2170
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