Honda 1994 Civic Coupe Online Reference Owner's Manual page 120

Cooling System
1. Slide the heater temperature
control lever to maximum
heat. Open the hood. Make
sure the engine and radiator
are cool to the touch.
2. Remove the radiator cap.
Maintenance
DRAIN PLUG
DRAIN BOLT
3. Loosen the drain plug in the
bottom of the radiator. The
coolant will drain through the
splash guard. Remove the drain
bolt from the engine block.
RESERVE TANK
HOLDER
4. Remove the reserve tank from
its holder by pulling it straight
up. Drain the coolant, then
put the tank back in its holder.
5. When the coolant stops
draining, tighten the drain
plug in the bottom of the
radiator. Apply non-hardening
sealant to the drain bolt
threads and reinstall the bolt
in the engine block. Tighten it
securely.
RESERVE
TANK CAP