Honda 2003 Accord Owner's Manual page 277

Cooling System
6-cylinder models RADIATOR CAP
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. Clean up any
spills immediately. Spilled coolant
could damage components in the
engine compartment.
5. Put the radiator cap back on.
Tighten it fully.
274
Maintenance
4-cylinder models
RESERVE TANK
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.
6-cylinder models RESERVE TANK
Do not add any rust inhibitors or
other additives to your car's cooling
system. They may not be compatible
with the coolant or engine compo-
nents.