Help Airco Removal

[MallorcaC10]

Hi there,

I am rebuilding my 1070 c20. I'm sure this has been answered/explained before but cant seem to find it. Now that I have my truck without fenders, hood, etc., so with fully acces to airco unit I'd like to know:

a) Is is possible to remove the whole airco unit without messing with any heating parts?

b) Is is just a matter of pulling it out?

I don't know if airco/heating both share the same fan unit or if they have an independent one.

Any info is welcome.

I love this forum. Without it, it would have been totally impossible figure out parts and procedures from a little island in the Mediterranean.

[CarlsLQ9SS]

If you have a factory air conditioned truck, the air conditioning parts of the box are mostly located on the outside of the firewall. Most of the heating components are located on the inside, with the exception of all the duct work and some relays as well as the controls. The unit shares the same fan with the heater core mounted inside the box that mounts under the dash. If this is a non air truck the heater core is mounted inside the box that bolts to the outside of the firewall. I hope this helps you out.

Carl

[MallorcaC10]

It is factory airco, yes, according to the plate.
So, if I got it right -excuse my illiteracy- I can pull the whole unit that's outside the firewall out and still the heating will be operational without having to reinstall anything? Is there a thread illustrating any airco-to-non-airco conversion?

Thx

[dmjlambert]

The factory air conditioning unit in the engine compartment is the evaporator housing.
It has the hot/cold air blend door and the blower. You will need it for your heater to work properly. You can remove the evaporator core from that box and plug the tubing holes if you want less clutter left over in the engine compartment after removing the other air conditioning components (compressor, dryer, condenser, hoses, etc.)

[MallorcaC10]

Ok, thanks a lot for the help, I'll work on it then and see how it goes.
Is there a thread on it anywhere?

[Andy4639]

Just pull the motor side out of the AC stuff and find some one selling the heater box stuff. Then it's direct fit. You may find someone willing to swap with you. Most people go the other way and have the heater only stuff every where.

[MallorcaC10]

Yes, well, not that easy, exchanging parts from Europe to USA and back, but any info is very valuable for me. Besides no used/swap parts at all here.
Will try to open it this weekend following all these tips.

[Andy4639]

Originally Posted by MallorcaC10

Yes, well, not that easy, exchanging parts from Europe to USA and back, but any info is very valuable for me. Besides no used/swap parts at all here.
Will try to open it this weekend following all these tips.

I didn't even get that part! Yea it maybe a little harder than that then sir!
Good luck with it.

[dmjlambert]

If I were determined to never have air conditioning again on a truck like mine, AND for some reason didn't like the evaporator housing sticking out far into the engine bay, AND did not want to spend money on a Firewall A/C Delete Cover, then I would cut the housing down only leaving about 6 inches of the unit sticking out from the firewall, and screw or glue a flat cover over what was left. Perhaps a piece of sheet metal, plexiglass, or plywood to cover the opening that was left after sawing the box.

A Firewall A/C Delete Cover is something like this
https://www.classicindustries.com/pr...rts/14445.html

I don't know if I would go for that. I probably wouldn't. The delete cover does not appear to have a blend door lever. So it probably doesn't have a hot/cool blend door at all. That would mean one of the levers on the dash controller would connect to nothing and it would just flop around. You won't be able to control how hot the heater gets, only the fan speed. To me, that is not enough control. I would probably just cut the stock housing to be shorter, or leave the stock housing alone and just remove the evaporator and plug the 2 holes where the pipes from the evaporator used to come out.

You can take the evaporator housing off the firewall of the engine bay, and take the heater core box off the firewall inside the cab, and put them on a workbench and bolt them together and observe how they work and see how the air flows through the system. Then decide what to do. That's what I did. I restored the evaporator box and the heater core box. I am going to get my air conditioning going again.

There are other boxes in the cab downstream from the heater core box, and they also have diverter doors in them that let you choose between air vents in the dash or blowing on my feet, or blowing at the windshield (defogging). The boxes in my truck had bad diverter doors and didn't work at all any more. So I bought good condition used ones from another forum member here. If you need those in-cab diverter boxes, they are quite a bit smaller than the evaporator core box so they may be reasonable buy and have shipped to you.

[MallorcaC10]

Wow, cool solution, thank you all.