Volvo S90 2019 Owner's Manual page 559

Coolant expansion tank, left-hand drive vehicle.
Unscrew the cover in the plastic covering.
Unscrew the expansion tank cap and fill
coolant as needed. The level should not
exceed the yellow MAX mark inside the
expansion tank.
Put the components back in place in the
reverse order.
CAUTION
Do not ingest the contents. May cause
•
damage to organs (kidneys).
Use premixed coolant according to
•
Volvo's recommendations. If concen-
trated coolant is used, make sure that
the coolant mixture is 50% coolant
and 50% water of acceptable quality.
Do not mix different types of coolant.
•
To help ensure sufficient corrosion pro-
•
tection in the system, only use new
coolant when replacing larger compo-
nents in the cooling system.
Never run the engine unless the cool-
•
ing system is properly filled. An
improperly filled cooling system could
lead to high temperatures and cracks
in the cylinder heads.
High levels of chlorine, chlorides and
•
other salts may cause corrosion in the
cooling system.
MAINTENANCE AND SERVICE
Related information
Engine compartment overview (p. 553)
•
Coolant specifications (p. 618)
•
557