Heater Core

Yeah there was one inside I remember that.

Ok now its my turn. On my 73 Monte its never been messed with before (heater core) how do I get that bolt that comes in from the engine side out ? I took out the blower motor and nothing there it seems to be behind the AC evaporator. I think its different than the 77 or the 77 didnt have all the bolts back in it from the previous install. Its about 3 oclock on the inside .

This one? On the engine side? This unit is back in the car but the a/c housing is still out on mine I can take a pic tomorrow PM maybe if you need one, let me know.

It seems to be in between the blower motor and the evaporator when looking at it on the inside.Its on the right side of the case. I dont think your whole picture is showing up on my computer

remove the blower resistor the nut is in the hole

Right,what about the one that goes in from the engine side at about the 3 oclock position. Thats the one im getting grief from.

I sent these to Ant & am posting here too as this job is a ROYAL PITA. (It's amost as bad posting about it!) Hope it at least makes sense & helps others too. There may be a slight difference in the 73 versus other years. (Ant can expand on that when he's done w/ the install). Mine is a 77 BU. Also- when removing the Evap housing, KEEP IN MIND ALL THE WEIGHT WILL EVENTUALLY BE ON THE BLOWER MOTOR. You may want to remove that before doing anything else to avoid breaking the 35 year old POS if clearance and or a good footing is an issue. See pics below.

#'s 1, 2 & 3- (Bolt Screws) Access from the engine side & hold Evap housing to firewall near Blower Motor.

#4 (Stud) Hard to see from the inside but see 2nd pic below. It's numbered & above the # 7 Bolt Screw.

#5 & 6 are heater box studs accessible on engine side (hard to get at). Housing also is held here along w/ 1,2 & 3 for support & to tighten the housing to firewall.

#7- Bolt Screw, (as thick as #1,2 & 3) Attaches from engine side through heater box at the bottom by the floor pans. See 3rd Pic interior view.







Heater Core & Heater Core Housing Engine Side


Heater Core & Housing back side to "Heater Box"


Heater Box




Note- This is a guide (this is only a guide). I am not responsible for the above content and neither is this website or anyone associated herein or herewith.

My '75 & '77 Elco heater/AC box is different than that, for some reason. Still have a few parts around for those. Mine fastens to the fire wall a bit different....

pila wrote:My '75 & '77 Elco heater/AC box is different than that, for some reason. Still have a few parts around for those. Mine fastens to the fire wall a bit different....

I wonder if it's because the passenger compartment is for 2? Mine has the "Four Seasons" A/C, which the only difference I can see is that the control panel has a "Bi-Level" (dash vents & floor vent operate together).

Ya know, I'm almost glad I had this problem in the first place. This is turning into a decent resource of info. At least 77mali has pictures, I still think back to when I was doing mine and only rehash feelings of rolling it into the driveway and lighting it on fire or covering it up and never looking at it again...rofl...