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240Z Air Conditioning

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  • 240Z Air Conditioning

    This is a subset of my 72 240 rebuild. I'm breaking this out because it really is a separate project. As always i'm looking forward to comments and hints. This will be my first AC project and I'm hoping it won't be painful. I'm buying components as I go, hoping to minimize the usual unused parts at the end of a project. I intend to list the full parts list at the end c/w prices. The heart of the system will be a Vintage Air Gen II mini. My searches indicate that it will fit and I'm impressed that it is servo controlled. No cables and I can integrate the controls into my OEM panel. My main suppliers will be Horton's in Milton for the Vintage Air bits and of course Rock Auto for compressor & condenser. I'm frugal. So let's begin....

  • #2
    I bought a Sanden SD 508 compress and now I have to hang it on the engine. Vintage Air U Weld brackets were the easy option. I could have fab's these, but Covid has limited my machine shop access. I mocked the entire assy in 1/4 plywood: 5 15 AC brkt 1.jpg There are 4 convenient 10M x 1.5 holes on the block - memories of an air pump that somehow dropped off decades ago.

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    • #3
      Then I traced the U Weld brackets and did a trial fit:
      5 15 AC brkt 3.jpg

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      • #4
        The straight edge clamped on the damper made sure that the compressor pulley was aligned

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        • #5
          The base plate is 1/4" 6" high, 7" long steel. From an off cut at the metal store - tell them what you're doing and you get a great price. The holes are 11mm on 96mm cntres, 20mm off the edges. I cut the U Weld brackets to match the plywood mock up, then welded them to the base.
          5 16 AC brkt stl 1.jpg
          A little paint makes anything look good.

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          • #6
            I'm happy with the alignment (whew!), looks like it should be there. I welded the brackets so that the compressor enters from the top. The AC hoses must be oriented "up" so if the brackets are on top the hose fittings must be long to allow the hoses to clear. This orientation avoids that.
            5 16 AC brkt stl 5.jpg

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            • #7
              I've been ripping out the existing heating / vent system - satisfying but nothing to really see.
              I intend to install the VA switches in my existing dash, even using the Datsun knobs. Could be a bit tricky. I bought the VA control panel because it's supposedly cheaper than buyings the individual component. The Datsun knobs are held on by small philips screws. Easily removed as is the dash panel once the cables are disconnected. I'm still working on removing the heater core etc. but it should be on the bench tomorrow. My intention is to leave the dash in place. Not sure if this is the best decision but will find out. I took apart the VA panel - getting the knobs off is tricky - used a thin screwdriver to pry between the clip and the knob. Worked.. 5 17 AC console 5.jpg

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              • #8
                The Datsun knobs are held on with M3 screws. I intend to drill and tap the VA switch arms - but first i have to fab some mounts for the back of the Datsun console. I'd like to have all the knobs protruding roughly the same distance - gonna be a challenge.
                5 17 AC console 1.jpg 70's technology. Ugh.
                Last edited by DAT240; 05-17-2021, 09:23 PM.

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                • #9
                  VA components: 5 17 AC console 6.jpg

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                  • #10
                    BTW - I'm going to use a rotary switch for the fan to mimic the Datsun control. I haven't figured out an elegant way to label the slides - any suggestions?

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                    • #11
                      You can get black tapes for label makers, that print with white (or other colour) text. I would likely take some trial and error to get the spacing, text size and font right, but you can use that, trim it down and stick into the grooves where the existing labeling is.
                      Last edited by Six_Shooter; 05-22-2021, 11:45 PM.

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                      • #12
                        Good suggestion - I searched a bit after Six Shooters post - lots of tape options for label makers available. That could work really well.

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                        • #13
                          Sorry for the delayed updates - but there has been progress:
                          Here's old heater core / fan - it weighs a ton.
                          AC 6 2 old 2.jpg

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                          • #14
                            I discovered the source of fresh air to the blower - the intake to the blower is mounted to this opening which gets air from the vents on the cowl. There's a cable controlled flap that closes this off. I'd like to retain this source of air but there's the question of how to close it off when I don't want cold air. I could modify the old flap control but it would definitely not be an elegant solution. I haven't seen any mention of this on other AC installations on various sites.
                            AC 6 2 vent.jpg

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                            • #15
                              I'm happy with the fit of the exap unit and surprised that the dash hoses will match up. There's an issue with the passenger defrost, but I'll deal with that later. Here's a shot of the evap unit in place. I'm now fabbing mounting brackets. I'm happy with the decision to leave the dash in place for the installation. Yes it's a tight fit and I'm now qualified as a contortionist, but it lets me see where everything will finally fit. I'm not sure how I would do that with the dash out.
                              AC 6 2 hoses.jpg

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