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Everything posted by adamderosa

  1. I have experienced this in my Avanti as well when it's really cold. I believe what may be happening is that the diaphragm and seals inside the brake booster become stiff at cold temps and cannot function properly until it warms up a bit.
  2. Javier, The expansion valve will be connected to one of the hoses going to the evaporator. You'll need to peel back the black insulation to get to it. The capillary tube goes between the expansion valve and the evaporator, and is used to cycle the compressor on/off to maintain the temperature set with the control knob.
  3. Kodjo, Is the diagram you provided for an Avanti? I did not change the position of the expansion valve; it is mounted on the supply side to the evaporator. If it were on the outlet side the system would not work.
  4. As Kodjo stated, you should be able to get to the expansion valve through the opening above the right ( passenger side) console panel.
  5. 4 small questions: 1) is there a typo in your expansion valve number? I found a 33076-VUI. Yes, you're correct - I made a typo; sorry! 2) *where* is the Drier located? On mine, the receiver/drier is located on the passenger side inner fender. I'll try to post a pic. 3) *IF* I wanted to go ahead and replace the evaporator, did yours have any identifying size/type/model that would allow me to hunt for replacement? I can maybe save that for last and see if the current one works, but if I'm going to replace the expansion valve, maybe it could all just happen at once. I'm not aware of any numbers on the evaporator; perhaps I just didn't notice at the time. If you wanted to replace it you could see what aftermarket one had similar dimensions or contact Dan Booth at Nostalgic Motors, or another Avanti parts vendor and see if they have one. 4) are you happy with the results and the parts? anything you would do different? I measured and will go for the larger 22" wide condenser (23" would be perfect but thats not an option I can see). Yes I'm very happy with the results and would not do anything differently. I live in AZ now and it will cool quite well even when its 110 outside. The only problems I've had were a couple of leaks from the crimps of the hose fittings (and this didn't occur until years later), which required me to have one of the hoses re-made a couple of years ago. For this project to be successful make sure you're not letting in hot air from the outside through missing firewall grommets, worn or missing seals at the footwell vents, etc. thanks so much for all that help! I feel I am well on the way now. You're welcome! And by the way, since all Avantis are a little different your installation will probably differ slightly, and since this is not a "bolt-in" kit be prepared to do a little fabricating for things like mounting brackets. The Vintage Air catalog is a great source for information too. There are other old car air-conditioning vendors out there that are probably helpful as well.
  6. Javier, I converted my "72 to R134a back in 2004, using components from Vintage Air. The only piece I kept from the original system was the evaporator, which I first removed to have flushed and tested for leaks. Since you asked for part numbers here's what I installed: Expansion Valve Kit P/N 3306-VUI (The expansion valve is located in the console, attached to one of the fittings on the evaporator. You should be able to see it on the passenger's side, It may be sealed up and covered in insulation) Thermostat P/N 11013-VUE Receiver/Direr w/ binary switch P/N 07322-VUC 14x20" Condenser P/N 03261-VUC (the next size larger probably would've fit too and worked even better) I used a Sanden compressor, but the one you're looking at should work ok too. I purchased my components through a Vintage Air dealer and installed them myself. Then, I bought the hoses and fittings and figured out how they needed to be routed, at what length and with which fittings. I brought the hoses back to the Vintage Air dealer and had them crimp the fittings on. Finally I installed the hoses and brought the car to them to have the system charged. The evaporator is a pain to remove, but not impossible. There was a recent article on this in issue #194 Spring/Summer 2021 of Avanti magazine. You should be able to remove the condenser through the grill opening without removing the radiator. I'd be happy to answer any questions. Good luck!
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