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Today at Atelier Kaz - Private NSX Enthusiast, ex-Honda R&D engineer with F1, Indy/CART background

AC Refresh 10

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Bench tested each motors on the bench.






This is what’s happening when you change the temperature setting.

The CCU sends the command to the air mix motor to adjust the amount of hot coolant passing through the heater core by changing the position of the water valve.
The motor is also directly connected to the air mix door and not only it adjusts the amount of coolant but also the air passing through the heater core.

It's bit too dark but you can see the heater core fins in the background.
I just applied 12V for open/close testing but in the real world, depending on the temperature setup and sensor input,
the doors will be fully opened, closed or partially opened.






Ready to install the new evavo.







Applied small amount of sealant around the area that needs good sealing and the heater unit is now ready to go back into the cabin.






Installed the CL/pulley/field coil assy onto the new P9K compressor.
The original shim was about 1.6mm thickness but with the CL worn, the gap was well over the limit so
used 2 set of OEM shim parts to create about 1.3mm shim.
The gap is now about 0.45mm.







This will be the last time I’ll see this label.
It will be covered by the ceramic heatshield tape.


Keep flushing the a/c pipes…..


There are several things to be done and not to be done with the new compressor so I hope I can finish them soon.




Kaz






Updated 28-08-2016 at 10:52 AM by Kaz-kzukNA1 (title a/c to ac)

Categories
My NSX , Heater, A/C

Comments

  1. flyingsniffer's Avatar
    Even with the pressure released those 10mm bolts holding the blanking plate on the new compressor are REALLY tight (or at least, they were on my new compressor).
  2. Kaz-kzukNA1's Avatar
    Hi, flyingsniffer.
    The hex allen socket bolt at the service valve on the original compressor is using only 25Nm torque.
    The OEM P9K compressor came with 8mm bolt at the shipping plate so should be lower torque.
    Haven’t tried it yet as the compressor and the receiver would be the last ones to be installed on the a/c system just before attaching the vacuum pump for removing the moisture.

    By the way, I'm glad I borrowed your flushing kit.
    The spray gun that came with my kit broke down after just 5min of usage......

    And I'm glad that I bought 2 cans of different flushing chemical than the one included in the kit.
    The one came with the kit must be of really strong chemical.
    As soon as it got on my glove, it melted it.
    I was worried about the effect on the o-rings that I won't be able to replace at the seized condenser fitting that I decided not to use it for flushing the system.

    Instead, I used the left over from your kit for cleaning the outside of 2 x compressor hoses covered in chassis black undercoat. Amazed how it can remove that sticky coating....


    Kaz