Subaru 1998 Impreza Owner's Manual page 250

Drain plug
2. Loosen the radiator cap to drain the coolant from the radiator. Then
drain the coolant from the reserve tank. Tighten the drain plug secure-
ly.
3. Slowly pour the coolant and fill to the radiator filler neck and to the
reserve tank's "FULL" level mark. Do not pour the coolant too quickly,
as this may lead to insufficient air bleeding and trapped air in the sys-
tem.
Coolant capacity: 6.2 US qt (5.8 liters, 5.2 Imp qt)
OM-H0196
Filler neck
Fill up to here
OM-H0197
Maintenance and service
"FULL"
level mark
"LOW"
level mark
– CONTINUED –
HG0114
10-17