Volvo S 90 2017, Owner'S Manual

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MAINTENANCE AND SERVICING
505
Refilling coolant
Coolant helps keep the gasoline engine at the
proper operating temperature. The heat transfer-
red from the engine to the coolant can be used
to warm the passenger compartment.
When refilling coolant, follow the instructions on
the package and use the recommended amount
of coolant. Never fill the cooling system with
water only; this could lead to freezing, corrosion
and engine damage.
WARNING
If the engine has been running, the coolant
will be very hot. Allow the engine to cool
before opening the coolant expansion tank. If
this is not possible, open the cap very slowly
to allow pressure to dissipate.
Coolant expansion tank
Unscrew the cover in the plastic bulkhead
cover.
Unscrew the expansion tank cap and add
coolant if necessary. The level should not
exceed the yellow
MAX
marker in the tank.
Put the other components back in place in the
reverse order.
CAUTION
•
High levels of chlorine, chlorides and
other salts may cause corrosion in the
cooling system.
•
Only use coolants with corrosion protec-
tion recommended by Volvo.
•
The ratio of coolant to water is 50/50.
•
Mix the coolant with tap water of drinka-
ble quality.
•
If maintenance is performed on the cool-
ing system or if the coolant is replaced,
flush the cooling system with clean water
before adding new a new coolant/water
mixture.
•
The engine may only be operated with a
properly filled cooling system. Otherwise,
high temperatures and cracks in the cyl-
inders may occur.
Related information
•
Coolant specifications (p. 552)