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A/C for '73, factory or dealer installed?


gogriz91

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The A/C setup in my Z looks like it was "meant" to be there. There's a metal mount for some little black canister on the wheeelwell between the cooling radiator and the passenger footwell how-ya-doin'. I always thought it was a dealer installed option but it looks like things were put in the engine compartment for the purpose of mounting the A/C hardware.

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My understanding is that optional factory installed A/C was only available on the 1974 260Z and later models.

Where is the on/off/temperature knob located? Is it under the dash next to the trip meter reset knob or mounted on the console next to your right leg?

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It's next to the trip meter.

I'm pulling the stuff out of the car. There are two hoses running through the firewall into ??? in the passenger footwell. Will I have to seal up the places where those hoses mate with the rest of the heating system?

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You won't have to seal up anything since those hoses run into the a/c evaporator. I'd like to see some pictures of the system but it sounds like you're removing it. The 'little black cannister' is the reciever/drier and what I think you refer to as the 'cooling radiator' is the condenser. If it is indeed a factory system, why don't you repair it? I had actually read somewhere where some factory systems did appear on some late 73's.

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no factory A/C in 73 model 240's sold in the USA.

"black canister" could be part of the emissions (evap) system on a 73 model 240z.

as for the holes (since you say you are removing the a/c), if you don't seal them you will have massive air leaks in the heater system and air will not flow as the system was intended.

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I'll try to post some pictures of it and the rest of the system tomorrow. I'm removing it mainly because I want to eliminate the weight. I'm going to hang on to the stuff in case I want to put it back in and after one summer in Middle GA, it may go in quicker than I think.

The little canister I'm talking about is about the size of a Coke can and has a small round glass "window" on top of it. The how-ya-doin' in the footwell is on the right of the heater blower motor and looks to be at least two large pieces of plastic held together by a row of phillips head screws. Will this thing come out with the rest of the stuff or is it a part of the heating system?

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You have just described a factory system, regardless of what Garth says. (No offense) The 'coke can' is the receiver/drier and the 'how-ya-doin' is the evaporator box. It will come out but you'll have to seal the opening where it sends the cold air into the heater box. I'll post a picture in a couple of minutes. BTW, and I know I've mentioned it here on this site before, I'm a EPA certified MVAC tech.

EDIT: After checking my research materials, if your evaporator box is in the passenger footwell then sombody did a really nice install because that is the later 810-Maxima-ZX system. The early cars had the evap box behind the heater control panel in the middle of the dash. Now I'd really like to see some pictures!

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You have just described a factory system, regardless of what Garth says. (No offense) The 'coke can' is the receiver/drier and the 'how-ya-doin' is the evaporator box. It will come out but you'll have to seal the opening where it sends the cold air into the heater box. I'll post a picture in a couple of minutes. BTW, and I know I've mentioned it here on this site before, I'm a EPA certified MVAC tech.

Not trying to wizz on you Stephen, but WHERE have you heard of factory systems appearing in 73 240Z's. I've never heard of that before. I'm also interested in how his description describes a "factory" system and not an aftermarket (dealer installed) system?

as for the holes you're mentioning that would send cold air to the heater box, that is what I was refering to in my first post when I said they'd need to be sealed.

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Garth I apologize. Everything I've ever read says no ac until the advent of the 260z but I had heard somewhere that a small number were put on late 73 toward the end of that model run. I'd never actually seen one but I thought his could possibly be one of the rumoured 73s with factor air. Further research tell me that it could be a clever aftermarket install using factory parts becuse his evaporator box in the wrong place for a factory S30 system from any year (74-78). On the other point, we just had different concepts of what holes he was talking about sealing.

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As for your other question, Garth, the only thing that made me think that it could be factory was the location of his evaporator box. But then when I thought about it, it's the 810s and the Maximas that have the box in the passenger footwell. Good call Moonpup, I guess we both missed that. I'm going to be quiet now until I see some pictures.:stupid:

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Here's some pics of what I believe to be a Nissan Distributor(not a dealer) installed AC system in my '73 240Z. Also, I have a '73 owner's manual which references 240Zs w/AC in tables for vehicle stopping distance, recommended tire size/inflation, and aceleration and passing ability.

AC Controls

028.JPG

Receiver/Dryer

You can see this on the passenger side firewall.

http://jaderunner.com/Auto/240Z/images/Purchase/034.JPG

Evaporator

http://jaderunner.com/Auto/240Z/images/Evaluation/IMG_3574.JPG

http://jaderunner.com/Auto/240Z/images/Evaluation/IMG_3576.JPG

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That's aftermarket. The main giveaway is the barrier hoses with clamps rather than machined hoses for the high and low side lines. Also the Sankyo compressor is aftermarket and they are still available today under the name Sanden. They bought out Sankyo some time back. That's a nice install compared to the usual York system that was so commonly used back then. The evaporator box does look almost 'factory'. The best way to take care of the hole that will be left when you remove the evaporator box would be to go the junkyard and get another blower motor housing. Thanks for the pictures Pete and Adam. I have added them to my early Z a/c research folder. Pete, can you post a picture of the control on your dash?

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BTW, the A/C system in my car is non-functional and missing the compressor and condenser. I don't need it where I live anyway so I have removed the rec/dryer and will probably remove the evap at some point in the future to give the passenger some more leg room.

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Just to add to this. (I love a good troll and the flames). I've got a 73 that I've had since 76. The evaporator core is just above and to the right of where the passengers feet are. The thermostat that cycles the compressor is on a little black box right in front of the choke lever. It was definitely after market because I have some of the info that was included when it was installed in San Marcos texas. It is very well integrated and to the casual view you might conclude that it is factory air. As a matter of fact the brand name on the little box with the thermostat say "Factory Air". I've since replaced the 2 lung tecumseh with a nice rotorary.

Now what I need to do is go buy some of that insulation sound deadning foil foam to line the inside and make the ac a bit more tolerable in the summer. Its ok now, but sometimes it gets to 110 degrees here.

Don

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