Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

Results 1 to 8 of 8

Thread: Orifice tube orientation, 1999 STS

  1. #1
    knon2000 is offline Cadillac Owners Member
    Automobile(s): 2005 STS 2009 CTS
    Join Date
    Sep 2009
    Age
    49
    Posts
    48

    Orifice tube orientation, 1999 STS

    When we removed the orifice tube, stupid me didn't note the orientation. The posts that I found while searching referenced the brake booster, which in the 99 STS, it is not in line with the AC line containing the orifice tube. Can anybody remember which end faces the radiator?
    Right now, I have it installed with the arrow pointing away from the radiator. Long end towards the firewall. Is that correct? Seems like it isn't cooling like it should and we flushed it thoroughly.
    The compressor puts a load on the motor that seems excessive, and the cooling lines shake abit. When we originally put in the Freon, it was quiet, didn't have what I thought was an excessive load. Right now it seems to "tick" when running, and I know it isn't the belt, and it didn't do that when we put the compressor in on Friday.
    I was just thinking maybe I had the orifice tube in wrong, or that maybe it got clogged up with debris that we missed, although I rather doubt that.


  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Location
    Woodstock Ill.
    Age
    69
    Posts
    82,278

    Re: Orifice tube Orientation, 1999 Cadillac STS

    I assume the arrow points in the direction of refrigerant flow. If so, this should help.
    http://autoacrepairs.com/OTSFlow.html

  4. #3
    knon2000 is offline Cadillac Owners Member
    Automobile(s): 2005 STS 2009 CTS
    Join Date
    Sep 2009
    Age
    49
    Posts
    48

    Re: Orifice tube Orientation, 1999 Cadillac STS

    Thanks for that
    It would appear that I have it in correct
    Guess I need to look at it to make sure that it isn't covered with debris.

  5. #4
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Location
    Woodstock Ill.
    Age
    69
    Posts
    82,278

    Re: Orifice tube Orientation, 1999 Cadillac STS

    Was there any debris on the old one when you removed it? If not, then this one should be fine.

  6. #5
    grkid89 is offline Cadillac Owners Member
    Automobile(s): 1999 Seville STS Northstar 32 Valve V8
    Join Date
    Oct 2009
    Location
    Florida
    Posts
    78

    Re: Orifice tube Orientation, 1999 Cadillac STS

    I have the same question. I put the short side (with the arrow) into the low pressure side. Did I install it in right?

    However, when I took the old orifice tube to replace, the new one I bought doesn't fit. So I just used the old one.

  7. #6
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Location
    Woodstock Ill.
    Age
    69
    Posts
    82,278

    Re: Orifice tube orientation, 1999 STS

    I assume you viewed the link in post #2?

  8. #7
    grkid89 is offline Cadillac Owners Member
    Automobile(s): 1999 Seville STS Northstar 32 Valve V8
    Join Date
    Oct 2009
    Location
    Florida
    Posts
    78

    Re: Orifice tube orientation, 1999 STS

    Yes, I did, but not completely understanding it.

    I'm assuming the side with the arrow goes into the low pressure side, and the filter facing into the high pressure side.

    In any case, I think I put it in the right way according to the link in post #2.

  9. #8
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Location
    Woodstock Ill.
    Age
    69
    Posts
    82,278

    Re: Orifice tube orientation, 1999 STS

    Quote Originally Posted by grkid89 View Post
    I'm assuming the side with the arrow goes into the low pressure side, and the filter facing into the high pressure side.
    Correct.
    The orifice tube is where it changes from high pressure to low pressure so the arrow would point in the direction of the low pressure side which is also the direction of refrigerant flow.


Bookmarks

Cadillac Posting Rules

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Read about Lincoln | Buick | Kia Forte Forum