Heater assembly rebuild

This will be a simple task as far as the fixing part. Getting it out will be a bit harder.

I suggest a a new heater core for sure!

Maybe the cables if they are not moving well

The rest is going to be replacing the thin foam that seals the doors, you will see what I mean when you get in.

Somewhere over the years that have passed, someone decided to engineer a different blower motor into the equation. The replacement motor has a larger body diameter. The original motor protrudes through the firewall through a hole about the same size. In order to install the new style one, you must make the firewall hole bigger.

While the heater is out, this would be a good time to get a new blower motor and make the modification.

My daily driver (1977) had the crappy heater box in it.

I found an 1982 in the salvage yard, I snagged the newer heater out of it (same heater from 1979-1986). Cool thing is that while I was swapping/ upgrading my 1977 I did some measuring off of CJ body/ firewall. I was able to cut my heater box and firewall so that my heater core could be accessed through the firewall. I also chopped my firewall so that the whole blower motor could be removed the same way.

So now, If I remove my battery tray and two homemade covers. The core and blower will come out in minutes, without removing the whole heater. (I have measurements)

I'm going to send my mod pics now. There's a few more, I'm sure you get the idea and other heater pictures on the next answer block.

The Medic

When I did my mod, I did not keep my info. Later someone else wanted the measurements, so I tore back into the firewall and remeasured. There are more pics of my mod. That's why you see some of where I painted things the second go round.

Below are pics I grabbed and labeled from the net, as I am contemplating another mod. Just ain't got that far yet.

Let me know if you need anything.

The Medic

I'm here when you get caught up.

Your plate looks good.

As long as we are discussing heater.

Scope this out too.

Picture 1) Traditional heater hose routing
Feeding intake "full, hottest" coolant (red)
Cooled somewhat and now enters heater core (red/ blue dotted line)
Returns to water pump cool (blue)

Picture 2) Set up similar to a steam system is. Hottest water feeds intake and heater core at the same time, then returns cooler to the water pump. Hence more/ hotter heat from the heater core.

Picture 3) parts explanation

Picture 4) parts

Picture 5) This is my CJ-5 (Mr. Jeep) A little more involved, I made a heater to go in the rear. ("The Sahara Breeze") I have a little more piping, but still plumbed in like a steam system (everything gets fed from the thermostat housing-then returns to the water pump).

Picture 6) Explanation.

The Medic

Thanks for the compliments!

Keep us posted with progression.

The Medic