Does your Air Conditioning Work

[F.A.A.benny]

I've restored quite a few of these factory ac/heater parts. Haven't had any complaints yet, knock on wood. Went through pretty much everything on this 70 and it left the shop blowing 38° on 134a. But I'd like to mention that to get them working great with 134a a few things should be done including getting a nice size parallel flow condenser and a Poa valve that's calibrated for 134a.

[Malo83]

Nice!

[71CHEVYSHORTBED402]

I need to reinstall it. At least a new condenser is in order. It's been off quite a while. At this point I'm unsure what should be done with the install. Nice looking heater box up there.

[F.A.A.benny]

Thanks guys

[F.A.A.benny]

Originally Posted by 71CHEVYSHORTBED402

I need to reinstall it. At least a new condenser is in order. It's been off quite a while. At this point I'm unsure what should be done with the install. Nice looking heater box up there.

If you need some help on what should be done with the install, you can pm me if you'd like.

[71CHEVYSHORTBED402]

Originally Posted by F.A.A.benny

If you need some help on what should be done with the install, you can pm me if you'd like.

Book marked, thank you. I've browsed a few threads on R12 Vs R134........Not sure what I'm going to do. Found a can of R12 when I recently repacked the compressor and lines. I discovered duct tape IS NOT how to cap the lines (23 years ago, hard to believe). Just leaves a mess and corrosion......1/2" and 3/4" drip hose capped with duct tape are the ticket.

So you restore this stuff huh? Do you do anything for the Air/Defroster Selector Duct flapper? The rubber is a bit worn on the end, which is probably common. Few scratches on the finish of the box. Might be worth refinishing.

[F.A.A.benny]

I restore those also. Couldn't find any pics on my phone. I think they're on my pc

[71CHEVYSHORTBED402]

Originally Posted by F.A.A.benny

I restore those also. Couldn't find any pics on my phone. I think they're on my pc

I'd like to see that. Maybe a restore is in order.

[Andy4639]

Originally Posted by F.A.A.benny

I've restored quite a few of these factory ac/heater parts. Haven't had any complaints yet, knock on wood. Went through pretty much everything on this 70 and it left the shop blowing 38° on 134a. But I'd like to mention that to get them working great with 134a a few things should be done including getting a nice size parallel flow condenser and a Poa valve that's calibrated for 134a.

That is some nice work!

[F.A.A.benny]

Thanks, I appreciate it.

[F.A.A.benny]

Originally Posted by 71CHEVYSHORTBED402

I'd like to see that. Maybe a restore is in order.

I thought has another pic showing the door, rod and gasket before I installed them into the duct, but I can't seem to find it. The door and rod were replated though.

[71CHEVYSHORTBED402]

Nice. The boxes were brown I believe (I'm colored blind). Have you tried duplicating the color?

[F.A.A.benny]

Originally Posted by 71CHEVYSHORTBED402

Nice. The boxes were brown I believe (I'm colored blind). Have you tried duplicating the color?

Its a little hard to tell but they are a darker grey. Don't think I have ever seen one that was brown. I will be getting a darker grey to match tem better. Now the distribution duct, I have seen in brown and black

[4 Wheelin Fudpucker]

Got a Harley for the summer, and a Burb for winter
The factory A/C is getting torn out this summer

[71CHEVYSHORTBED402]

I think you're right, gray-brown-green (ha).....Here's an original. Little dirty. I haven't cleaned the interior in decades.

[F.A.A.benny]

Yea that's the look of the majority of the parts I have on the shelf

[zeldman]

I live in the high desert. 6500 feet. Very little to no humidity. Who needs an air conditioner?

Ok, there is like 14 days in the summer that it would be nice to have A/C after being parked in the sun all day. But other than that the heater is more important.

[davepl]

How can you find a leak once the freon is gone? I can -detect- a leak by vacuuming it down and seeing that it can't hold vacuum, but how do you (or I) sort out where that's coming from?

You could pressurize it and use soapy water, but compressed air might be too "wet" for the system, I'd hate to find that out the hard way.

Just FYI, mine was a brown-grey and this was a reasonable facsimile to it:

[F.A.A.benny]

you pressurize it with nitrogen. Happened to me on the 70 that I recently restored the ac system. Vacuum wouldn't hold and everything had been gone through. pressurized it with nitrogen and the problem was I had bad orings on the couplers to the machine.

[davepl]

How do you do that? Go to a welding shop, would they have tanks of it? Then you need adapaters and hoses I imagine to connect the tank, but you'd want a regulator of some kind because I'm sure the system wouldn't tolerate tank pressure, would it?

[F.A.A.benny]

Yea just need a regulator on the cylinder and hose the proper fittings. I do a lot of pressure checking with nitrogen on my welds so I already have all these things. not sure about welding shops but I would imagine a shop that deals primarily with ac(not just a regular automotive repair shop) has these tools also. I would look for one of them.

[AirSpeed]

Mine doesn't because the PO ripped it all out and even welded the vents closed in the dash. Had no idea it was an AC cab until I stripped all the paint and found the vent holes under 1/2" of bondo. I went ahead and ground out the bondo and tack welds and installed new vents after I painted my truck. One day I'll put the rest of the AC system back in. Can't understand why someone would rip it all out even if it didn't work! It's always been in Ca and it gets hot here!

[davischevy]

Originally Posted by tk1251k

My 1972 GMC Sierra Grande works just fine. It has 385,000 miles on it with all original hoses in place and 2nd a/c compressor but other that it works like a charm with no leaks.

Don't forget to change the break in oil in the engine.

[Billyburban]

My factory original AC still works

[davepl]

We're at 40-38 for a "works-doesn't" split, just about a perfect 50/50.