Honda 2007 Civic Hatchback Owner's Manual page 378

1. Make sure the engine and radiator
are cool.
2. Loosen the expansion tank cap by
turning it 1/8 turn anticlockwise.
This will relieve any remaining
pressure in the cooling system.
3. Remove the expansion tank cap by
pushing down and turning
anticlockwise.
CAP
4. The coolant level should be up to
the MAX line. Add coolant if it is
low.
Pour the coolant slowly and
carefully so you do not spill any.
Clean up any spills immediately; it
could damage components in the
engine compartment.
Engine Coolant (Diesel models)
5.
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.
MAX LINE
Put the expansion tank cap back
on, and tighten it fully.
Maintenance
375