The 1989 Honda Civic is not equipped with an EGR valve.
Take it to an a/c man. He has the knowledge and tools to do it.
Inside the evaporator case which is behind the glovebox
Where is the PVC valve on a 2002 Honda Civic EX?
The expansion valve is inside the plastic box along with the evaporator core underneath the dashboard, right side.
where is the iac valve on a 99 honda civic lx?
Locate heater control valve in a 2001 Honda civic
VALVE CLEARANCE FOR A 2000 HONDA CIVIC EX 2 DOOR
Pcv valve job on 95 civic
The AC receiver drier on a 1995 Honda Civic is on the high-pressure side of the system. It is between the expansion valve inlet and condenser outlet.
how do you replace the expansion valve
The expansion valve, on your 1998 Honda Accord, is located just before the thermostat housing. You can follow the water hose from the radiator to the expansion valve.