Need heatercore help asap

jraftb · 10-19-2009

well i stayed late at work to put a new heater core in my car, and i ordered the non ac core, and when i finally got everything out, my car has the ac heater core, but my car didnt come with ac, is there any way to make this heater core work without cutting up the firewall?

jraftb · 10-19-2009

so no ideas? im about ready to go home, leave the car in the lift and get the right parts tommorow, i think that would be the best way.

**EagleAutosports** · 10-20-2009

If it'll physically go into place, it should work. Can't guarantee you won't have to mildly massage the firewall though.

jraftb · 10-20-2009

ya i looked ati ti and i woulda had to cut about an inch from the firewall, i got the right part in today and ill be heading back to the shop in a bit to put it all back together

TownCarTechi · 4 Weeks Ago

Hi, I have a heater core problem with a 92 Mustang LX and I wanted to post to this thread since it is recent. I've searched on the forum and found two posts that gave very detailed instructions for dismantling the dash. I've been successful in getting through all of those instructions (thank you so much, members), but now I can't go any further without some advice.

I have some pictures to show my problem. I can't pull the heater box out far enough to get to the last back screw because the AC dryer is hitting against the firewall.

The 1st picture is the heater box. The last screw is on the left side in the back underneath the dash.

The AC hasn't worked for awhile so I don't know if there is any refrigerant in the system, so I'm unsure about the hazards of removing the AC dryer completely. The 2nd picture shows the AC dryer against the firewall. I can remove the top nut if it is okay, but I've never removed the type of special connection on the bottom.

I did remove the bolt that held the metal frame up on the passenger side, but should I also remove the bolt that holds up the metal frame on the driver side? I'm concerned what else may come down if I do so, including any electrical connections or wires that may be stressed.

This 3rd picture is from the driver side and you can see the bolt in the far left of the picture that holds this part of the frame in place.

I'm happy I've come this far because this is my 1st experience with heater cores. But I'm also unhappy if I can't overcome this last hurdle.

Thanks in advance for your help.