Honda Civic 1998 Service Manual page 1053

Heater Unit
1 .
Overhaul
Remove the two self-tapping screws and the heater
core cover.
Pull out the grommet from the heater core pipes.
Remove the self-tapping screw and the clamp.
Pull out the heater core from the heater unit.
NOTE: Be careful not to bend the inlet and outlet
pipes during heater core removal.
Assemble in the reverse order of disassembly.
HEATER CONE COVER
21-20