Fellow Forum Goers,

Recently bought a '93 FD and it has no working heat. Since it is getting chilly out, I would like to remedy this issue.

Up front, the AC works, almost too well, blowers work fine (understanding that heat does not come out of the face vents), fuses appear to be functioning properly (have not pulled apart dash to check the unit connections or resistors, just no heat. Upon further inspection I believe one of the previous owners bypassed the heater core completely with the coolant lines (see picture 1 and 2 for reference) as they are cut coming out of the firewall.

Reason I am asking is I haven't found the best layout diagram in the Service Manuals to pinpoint the exact hose location and routing for the heater core. Photo #3 shows a screen shot from the parts catalog manual, Page 3-D4 with the layout of the heater hoses and Photo #4 is a screenshot from the parts manual showing the heater core unit inside the dash. Would like to flush the heater core as a start, but need to make sure everything is installed properly.

Curious if I need to purchase the inlet and outlet heater core hoses (photo #5) from Atkins Rotary into the coolant lines, or if additional work is needed. Previous owners paperwork mentioned from a random shop about replacing the heater core with very little explanation, but I will cross that bridge if it is needed once everything is hooked back up properly.

Any help or insight is greatly appreciated, thank you for the time. I can take additional photos if needed for reference as well.

Cheers,

-milly


Photo #1

Photo #2

Photo 3

Photo 4

Photo 5