sblake01

Doubtful since factory a/c didn't appear until 1974

As an HVAC tech, I've been trying to find info on S30 ac systems. This is great! The interior switch is another indication that it is not factory air. That function would be controlled by the air lever on the heater/ventilator control panel in a car w/factory air. There would also be a position marked 'AC' on that panel. Typically the switch will have a thermostat with a capillary tupe that runs from the rear of the swithch to an area between the fins of the evaporator. I'ts function is to disengage the compressor clutch if the evaporator temp gets too low. It seems that the Yorx unit was the compressor of choice for the non factory systems until 74 when the factory systems appeared. Nissan must have specified that particular system for the early cars (70-73). Everyone I have seen has had the Yorx compressor with slight variations on the other components dependending on the company that actually did the install. Some were sent out to have the systems installed, some were installed by the Datsun dealership technicians as bg240 attests to. I have been unable to find any technical information on the systems used in the 70-73 cars. From 74 up the factory systems are described in the various service manuals. Datsun also seems to have continued to have non factory installs done on the 74-78 cars that didn't come with factory air, although they used a different system with a Sankyo compressor mounted on the drivers side of the engine. My 78 has that system. Although Sankyo has since been taken over by Sanden, that compressor is still available to this day. I would be curious to see pictures of the system on theianmonster's 73 parts car to see if my info is correct that the factory systems began in 74 with the 260 or did they actually sneak a few of them out in 73.

I figure if I ingore him I won't get the urge to bash him. :cross-eye

I only mentioned that because my car once was diagnosed with a bad FPR and when I put a new one on it, the problem I was having still existed though it was a different problem than clutch 07182 is experiencing. I took it to my friend's shop and it turned out to be a bad relay. Now he has had his shop (Z Car Speciality-Upland, Calif.) since the mid 80s and he is the one who told me that FPR's seldom, if ever, go bad. Of course, the Nissan dealer wouldn't refund my money for the part.

I've never heard of that before. Is that on your 240 or the Fairlady?

Can't see his posts anymore (ignore list). Dude's got issues!

The look would depend on the shop that installed them. Do they have the upright type "Yorx" compressor? (Chris and Ian)

How did they arrive at the diagnosis that the FPR was bad? Did they run a pressure test? I only ask because I've been around these cars for a while now and haven't ever seen a FPR go bad. It's a fairly simple device with no electronics. For flooding, I'd first check the thermotime swich and cold start valve. Then I'd look into a possible leaky injector or two.

Does your 73 have an add on type system (with barrier type hoses over barbs with clamps) or a factory type system with finished type hoses with fittings with machine crimped ends and hard lines to the evap, rec/drier, condedser etc.?

It's a great feeling to be right. (It would have been an even better feeling had I known that I was!) :surprised

Tomo, I just checked my 78 with a flashlight and there are no areas behind the wheel wells that are 'open to the air'. There is a rubber grommet on one side where the antenna drain comes through and two rubber grommets on the other side where the gas filler and the hose to the expansion tank go. They all seal well as I replaced the two smaller ones in 1999. I checked underneath and inside, no areas that are open to the air.

As Ed indicates, more info is needed, especially with a fuel injected cars. Black smoke can also be a fuel rich condition. Does it start easily when cold? Does it start easily when warm? How does it run/idle?

Tough question. You said 'factory dealer installed'. 70-73 Zs never came with factory installed AC. Factory air began in 74 with the advent of the 260Z. Dealer installed air was available on the earlier cars. Since it was 'dealer installed' which actually meant that it was sent out to a local AC shop, it would be hard to place a number on how many cars had this done since it was a random kind of thing. I'm going to add this edit here: My information is based on what I have learned about the USA market cars. If someone knows different about the non-USA cars please chime in.

I meant to pose this statement as a question. And thanks to Ron and Brian it has been answered.

Do you mean HS30-H?

Thanks, Ricklandia, I was going to answer xray until I read your post. I forgot to mention the garage thing. I guess I kind of took that for granted. I believe that is was Sleepy-Z who mentioned a 12 mile commute? I don't know which company he has his collector insurance through but with Hagerty, you can't use your car to commute.

I know what I said and it still wasn't directed at the author of this thread. You say one should ignore threads or subjects that you don't like that should also apply to opinions. I wasn't apologizing for the content of my post. Just for the fact that he may have taken it personally, which was not my intent.

That's what I used to change my clutch. I have two sets of 3 ton stands. Have had them for years and never had a problem.

The BRE cars used the 432R spoiler, so, in reality there really is no such thing as a BRE spoiler.

He did ask for opinions. Well actually he stated his preference and I stated mine. As did others, pro and con. I don't see anything wrong or personal with that.

As you can probably tell, so am I. But for different reasons evidentally.

Again, I apologize to you. My response wasn't directed a you specifically. Just the topic in general. I guess I need to realize that I was once new to all of this myself.

Hagerty is a specialty provider. I have their insurance on my Z and my 320. There are certain restrictions on how the car can be used. You can't drive to work or to school on a regular basis, etc. You must have a non collector car also on a regular policy with a regular insurance company in order to have their in order to have Hagerty's insurance on your collector car or cars. It's bascally for pleasure driving, shows, etc. Some of the major companies offer collector car insurance but it is usually through some subsidiary of theirs and after comparison, I came to the conlcusion that Hagerty is the best of it's type at least for me.

He got his help though the search function might have more helpful. But he also got opinions. It gets rather tedious seeing new threads that have been covered ad nauseum. When opinions cease to be accepted for whatever thery're worth here, I'm gone. We'd be left with theories about accleration vs time, photoshop crap, needless "what if" type questions, etc. Think of how many knowlegable people have already left this site because of those types of things.

Vicky, it's too bad your post wasn't before mine. It would have put me in better humour and I probably would have eased up a bit. Sorry guys and gals.