Honda Accord Crosstour Owner's Manual page 341

Engine Coolant
RADIATOR CAP
1. Make sure the engine and radiator
are cool.
2. Relieve any pressure in the cooling
system by turning the radiator cap
counterclockwise, without
pressing down.
3. Remove the radiator cap by
turning it counterclockwise.
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4. The coolant level should be up to
the base of the filler neck. Add
coolant if it is low.
Pour the coolant slowly and
carefully so you do not spill any.
Clean up any spill immediately; it
could damage components in the
engine compartment.
5. Put the radiator cap back on, and
tighten it fully.
2011 Accord Crosstour
6. Pour coolant into the reserve tank.
Fill it to halfway between the MAX
and MIN marks. Put the cap back
on the reserve tank.
Do not add any rust inhibitors or
other additives to your vehicle's
cooling system. They may not be
compatible with the coolant or
engine components.