Alfa Romeo Giulia Owner's Handbook Manual page 259

Open welding or loose connections
may permit exhaust gas to enter the
passenger compartment.
Have the exhaust system checked every
time the car is raised.
Replace the components where
necessary (for these operations, contact
an Alfa Romeo Dealership).
In normal operating conditions, the
catalytic converter does not require
maintenance. To ensure that it operates
correctly, however, and prevent it
from getting damaged, it is extremely
important that the engine operates
perfectly.
To minimise the risk of damaging the
catalytic converter, proceed as follows:
do not stop the engine or deactivate
the ignition device with gear engaged and
car in motion;
do not attempt to start the engine by
bump starting;
do not persist in using the car if
idling is very irregular or the operating
conditions are very notably irregular.
COOLING SYSTEM
Coolant (antifreeze) exiting from
the engine or vapour exiting from the
radiator can cause serious burns.
If vapour is seen coming from the engine
compartment, or its hissing is heard, do
not open the bonnet until the radiator
has cooled.
WARNING Never attempt to remove the
cap with radiator or expansion tank hot:
DANGER OF SCALDING!
Engine coolant check
Check the engine coolant level every
620 mi (1000 km) or before long trips.
If there are impurities in the engine
coolant, the system must be drained,
flushed and refilled: contact an Alfa
Romeo Dealership.
Check the front part of the condenser to
check for any build-up of insects, leaves
or other debris.
Should it be dirty, clean it by spraying
delicately with water.
Check the hoses of the engine cooling
system to ensure that the rubber has
not deteriorated and that there are no
cracks, tears, cuts or obstructions in
the expansion tank side and radiator
side connectors. Should there be any
doubt regarding leaks from the system
(e.g. if frequent top ups are required),
have the seal checked at an Alfa Romeo
Dealership.
With the engine off and at normal
operating temperature, check that the
cooling system radiator cap is closed
properly.
WARNING DO NOT remove the cap if the
fluid is boiling: DANGER OF SCALDING.
WARNING Before removing the engine
coolant reservoir cap, wait for the
system to cool down.
Topping up / draining / flushing the
engine coolant
If the engine coolant (antifreeze) is dirty,
have cleaning and flushing carried out at
an Alfa Romeo Dealership.
See the "Scheduled servicing plan" for
the correct servicing intervals.
Important notes
For topping up, use a fluid with the
same characteristics as those indicated
in the "Fluids and lubricants" table (see
"Technical specifications" chapter).
Do not use pure water, alcohol-based
coolants, corrosions inhibitors or
additional anti-rust products because
they may be incompatible with the
engine coolant and cause the clogging of
the radiator. The use of propylene glycol-
based coolant is also not recommended.
Engine cooling system cap
To prevent loss of engine coolant, make
sure that the expansion tank cap is
closed. If it is open, screw it completely
until you reach/hear the click.
Periodically check the cap and clean it
from any foreign bodies that may have
deposited on the external surface.
257