Today at Atelier Kaz - ex-Honda R&D, F1, Indy/CART engineer

Just disconnecting the fitting to allow flushing the system section by section and replace all 22 years old o-rings.





The evaporator fins look so clean after I washed it and applied DIY cabin air filter many years ago so
it’s sad that I have to replace it….


I wish the crack is somewhere that can be welded so that another owner can use this.






The old drier/receiver.

Thank you for serving the last 22 years.


On modern cars, it’s much smaller or not even on the system that when charging the system,
it’s very important to measure the amount of refrigerant and never over fill.


This acts as accumulator as well as air separator as not all of the high pressure refrigerant can be converted into fluid
after passing through the condenser under really hot condition.


At the era of NSX, this receiver was still fairly large capacity compared to the modern cars
especially with the R12 system so you have some tolerance for adjusting the refrigerant amount.


It has long tube from its exit port and the other end sits just above the base of the receiver
allowing only the liquid to enter the evaporator.


When the refrigerant level drops, the surface level of the liquid refrigerant is not high enough that
it will allow the mixture of the liquid and gas refrigerant entering the evaporator.


This is what you will see at the sight glass as lots of bubbles when the refrigerant level drops.


When passing through the expansion valve, the state changes from liquid to the gas that
it absorbs the energy from the surrounding area and thus, cools down the evaporator.

If the gas enters the expansion valve, it doesn’t change the state and thus loss of efficiency
resulting in not so cold air into the cabin.







The blower motor fan.

The seal foam simply brok down in bits and pieces as soon as I touched it.


No wonder why I smelt exh fume even using the re-circ mode at the CCU.








I never paid much attention to the internal mechanism of the blower motor design but even here,
I liked the way the designer paid attention to the detail.








Another wash up time….