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2002 Mazda 626 4cyl Orifice Tube

housefull7 on Thu August 14, 2008 10:15 PM User is offline

Year: 2002
Make: Mazda
Model: 626
Engine Size: 4cyl
Refrigerant Type: r134
Pressure High: 450

I have a 2002 Mazda 626 that I have replaced the drier, orifice tube, and compressor. Once the system has been sealed, vacuumed, and charged it runs fine for a few minutes then all of a sudden the high pressure jumps to 400. After opening up to check the orifice tube I find that it has been sucked down into the line to the first bend crimping and actually forming a blockage. Once again, replace the orifice tube with a second from Napa only to have the same thing happen. Any suggestions?

neilh on Fri August 15, 2008 1:50 AM User is offline

i assume you installed the tube in the same place in the line where the old one was. there should be a retainer in the line that holds the tube in place. you just push down the tube and check its locked in position..if you did all that and it still moved get a universal filter kit..comes with a short length of tube, different sized ferrules, nuts and a filter.. the orice tube fits inside..you cutout a piece of the line and install that

TRB on Fri August 15, 2008 11:26 AM User is offlineView users profile

Two things here make sure your getting a green/white orifice tube with two o-rings. Second did you replaced that short section of line which holds the OT? Also are you sure you are inserting it in correctly? On this system the white end would be inserted first!

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