Honda 1999 Odyssey Owner's Manual page 242

FILLER NECK
Fill up to here
9. Pour coolant into the radiator up
to the base of the filler neck.
10.Fill the reserve tank to the MAX
mark. Install the reserve tank cap.
11.Install the radiator cap, and
tighten it to the first stop.
12.Start the engine and let it run until
the radiator cooling fan comes on
at least twice. Then stop the
engine.
13. Remove the radiator cap. Fill the
radiator with coolant up to the
base of the filler neck.
14. Install the radiator cap, and
tighten it fully.
Cooling System
Maintenance