Orifice Tube Repair Kit
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RWD 19xx-1984 DeVille and Fleetwood,
1985-1996 Fleetwood and Brougham Forum Discussion, Orifice Tube Repair Kit in Past Cadillac Vehicle Discussion; So my A/C repair job went to hell in a hand basket. Like a good boy, I replaced both the ...
  1. #1
    turbojimmy's Avatar
    turbojimmy is offline Cadillac Owners Connoisseur
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    Orifice Tube Repair Kit

    So my A/C repair job went to hell in a hand basket.

    Like a good boy, I replaced both the stock and the aftermarket driers before installing the new a/c compressor. I also wanted to replace the orifice tube because I'm sure it's original and icky. Of course the orifice tube broke off inside the line. So I ordered a repair kit which consists of a short piece of tubing that splices in front of the stock line with a provision for a new orifice tube. Seems simple enough. But....how do I get the remnants of the old tube out? Drill? Other mechanical means? No matter what I do the line is going to be full of debris so I'm going to have to remove it, clean it and put it back on. I looked for new lines but couldn't find any.

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    jayoldschool's Avatar
    jayoldschool is offline GM RWD V8 addict
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    Re: Orifice Tube Repair Kit

    You get the old one out with needle nose pliers, and if that doesn't work, a wood screw will take it right out.

  4. #3
    turbojimmy's Avatar
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    Re: Orifice Tube Repair Kit

    Did I mention that the fitting was frozen to the line so I used vise grips to keep the line from twisting? That crushed the tube where the orifice is. So, my pain is self inflicted. I tried a variety of screws but it's not working. There's nothing left to grab onto anymore.

    The repair kit won't work unless that tube is clear. I ordered a new line for $30 from GMPARTSDIRECT. GMPartsGiant showed it as discontinued, but all the other GMwhatever sites would let me order it. We'll see if I get one. If not, I'll have to go the used route.

    It's complicated by the fact that the coach builder spliced in a "T" for the rear HVAC system. It's a few inches long so they did some custom bending on the stock tube to shorten it. I don't think adding the additional tubing from the repair kit would work anyway.

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    Re: Orifice Tube Repair Kit

    If I can help, LMK. I still have the parts car here. Haven't touched any AC components.

  6. #5
    turbojimmy's Avatar
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    Re: Orifice Tube Repair Kit

    Quote Originally Posted by jayoldschool View Post
    If I can help, LMK. I still have the parts car here. Haven't touched any AC components.
    Awesome! Thanks. I probably should have checked here first before blowing the $30, but I get impatient when things are broken.

    I haven't had one yet with decent A/C. Hopefully it's just the fact that I haven't done a decent overhaul like I'm doing now. I'd like to think that the stock compressor can handle the additional capacity of the rear system. I've never seen a limo built with a 2nd compressor, so it had to have worked with one compressor.

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    turbojimmy's Avatar
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    Re: Orifice Tube Repair Kit

    It turns out the orifice repair kit will work. I thought you jam it in-line with the existing line, which baffled me because how could you do that if the orifice is stuck in the original tube. But no, you cut the old tube out and the repair kit comes with a compression fitting. I'm going to try it and keep the new line around just in case it leaks.

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    jayoldschool's Avatar
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    Re: Orifice Tube Repair Kit

    It's only 70 bucks for a new set of lines, mine included the compressor o rings. You might want to replace the set. I did this on my Caprice when I got it. It won't have the T for the additional limo part, though.

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    Re: Orifice Tube Repair Kit

    Yep - RockAuto has the compressor lines for $40, but I needed the condenser line (the one from the evap core to the condenser). The limo has all sorts of extra plumbing, too. I don't want to mess with anything that isn't broken. It didn't leak before and with my luck it will after I "fixed" it.

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    Re: Orifice Tube Repair Kit

    So I was goofing around with that line today. The line gets smaller after the orifice tube part of it. Being a horrible judge of time, space and distance, I cut the line in the wrong place. I cut it where it was smaller, not where it was larger by the orifice tube. That renders both the line and the orifice tube repair kit useless. I could put compression fitting on it where I cut it, but I'm skeptical of that repair kit anyway. I'd have to install it where the line already has a good bend in it - I'm not sure it would have ever sealed anyway. I'll never know....

    The new line is still "on order" from GM Parts Direct. Hopefully they can get it. Otherwise I might hit you up for the one you have, Jay. It looks fairly easy to get out. May have to swing the PS reservoir and coolant tank out of the way. My car has a bunch of other limo-specific hoses and wires in the way, too.

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    jamespowers is offline Cadillac Owners Enthusiast
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    Re: Orifice Tube Repair Kit

    Quote Originally Posted by turbojimmy View Post
    So I was goofing around with that line today. The line gets smaller after the orifice tube part of it. Being a horrible judge of time, space and distance, I cut the line in the wrong place. I cut it where it was smaller, not where it was larger by the orifice tube. That renders both the line and the orifice tube repair kit useless. I could put compression fitting on it where I cut it, but I'm skeptical of that repair kit anyway. I'd have to install it where the line already has a good bend in it - I'm not sure it would have ever sealed anyway. I'll never know....

    The new line is still "on order" from GM Parts Direct. Hopefully they can get it. Otherwise I might hit you up for the one you have, Jay. It looks fairly easy to get out. May have to swing the PS reservoir and coolant tank out of the way. My car has a bunch of other limo-specific hoses and wires in the way, too.
    And to think, I was going to buy a limo.

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    Re: Orifice Tube Repair Kit

    Quote Originally Posted by jamespowers View Post
    And to think, I was going to buy a limo.
    Yes, it does get complicated sometimes. Particularly on the already-crowded right side of the engine bay. They splice into the heater hoses and a/c lines over there and add hoses for the rear HVAC system. I added some 0-gauge and 4-gauge wiring too, which is tough to navigate around. I'll get it sorted out eventually

  13. #12
    jamespowers is offline Cadillac Owners Enthusiast
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    Re: Orifice Tube Repair Kit

    Quote Originally Posted by turbojimmy View Post
    Yes, it does get complicated sometimes. Particularly on the already-crowded right side of the engine bay. They splice into the heater hoses and a/c lines over there and add hoses for the rear HVAC system. I added some 0-gauge and 4-gauge wiring too, which is tough to navigate around. I'll get it sorted out eventually
    I suppose it depends on what coach builder makes the vehicle. I have seen some real disasters---stretched with no frame reinforcements between the cut sections and all kinds of Rube Goldberg designs. I settle for a Brougham that I could understand.
    I am sure you will get it sorted out. Good luck.

  14. #13
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    Re: Orifice Tube Repair Kit

    Quote Originally Posted by jamespowers View Post
    I suppose it depends on what coach builder makes the vehicle. I have seen some real disasters---stretched with no frame reinforcements between the cut sections and all kinds of Rube Goldberg designs. I settle for a Brougham that I could understand.
    I am sure you will get it sorted out. Good luck.
    Thanks.

    This one is a Federal. My last one was a Superior. Both are examples of the more mass-produced limos. Most of the wiring and HVAC stuff is done almost identically on the two. The middle seat on the Superior was nicer - it was made to look like the rear seat and had the crest stitched into it like the stock seat. The Federal seat is more squared off and has less cushion.

    Back to the topic at hand, because the Superior was a smaller stretch the HVAC module was in the trunk. The A/C and heater hoses ran the length of the car. Nevertheless, it seemed to work fine with the only problem being that the air output was through the package shelf only. On this bigger Federal stretch, the HVAC module is behind the passenger seat. It doesn't heat or cool as well as the Superior did, despite having the outputs more strategically placed in the rear - one on each side in the middle and another pair in the back. It takes forever for the air to get hot or cold.

  15. #14
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    Re: Orifice Tube Repair Kit

    Predictably, GMPARTSDIRECT canceled my order because the orifice tube has been discontinued by GM. But I found this guy that has lots of NOS GM parts. He claimed to have 20 of the lines in stock so I ordered one:

    http://www.whiteracingproducts.com/search_custom.php

    I followed up with an e-mail to make sure and he said that he doesn't list things he doesn't have, he indeed had it and it will ship Monday.

  16. #15
    jamespowers is offline Cadillac Owners Enthusiast
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    Re: Orifice Tube Repair Kit

    Quote Originally Posted by turbojimmy View Post
    Predictably, GMPARTSDIRECT canceled my order because the orifice tube has been discontinued by GM. But I found this guy that has lots of NOS GM parts. He claimed to have 20 of the lines in stock so I ordered one:

    http://www.whiteracingproducts.com/search_custom.php

    I followed up with an e-mail to make sure and he said that he doesn't list things he doesn't have, he indeed had it and it will ship Monday.
    I hope you get what you need this time. You can get the limo on the road again soon.
    Cadillacboy and Cadillacboy like this.

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