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Registered
Join Date: Dec 2002
Location: Dahlonega , Georgia
Posts: 14,606
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more AC upgrade questions
I finished installing my new expansion valve on to the evaporator and I am now ready to replace the tar like substance that was on the original,I am assuming this is to insulate the expansion valve? Where does one purchase this stuff and what is it called?Is there something that can be purchased locally(Home Depot,Lowes) that can be substituted?Also the expansion valve I installed had longer copper lines than the original,I have them neatly coiled,do the copper lines have to be coated with the tar like substance?Another question I am either going to go with HC12A or Freeze 12 for refrigerant,I did not drain the existing oil out of the compressor but have flushed all the condensors and am installing a new receiver drier,I know I have to add about 4 ozs. of oil,should I go with mineral oil or Ester?Last question has anyone come up with a better way to attach the top cover of the evaporator/fan housing to the botttom besides those stupid clips?I managed to break one of the tabs and it looks like previous mechanics broke one also.Sorry for the long post but my project is coming along and I have to work out these details.Thanks
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01-23-2005, 03:07 AM
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Who is John Galt?
Join Date: Jun 2003
Location: Knoxville, TN
Posts: 638
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It's called prestite tape, and you can order it online. You're correct about its purpose, and if you don't have it then the expansion valve will never close like it should, causing the evaporator to ice up. The excess capillary tube should be coiled up, with a layer of presite between it and the expansion valve. Remember the capillary it there to sense the evaporator OUTLET, while the expansion valve is on the evaporator INLET, so there needs to be some insulation between the excess capillary and the valve. I can't help you with your oil question. Good luck,
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'79 911sc Targa '02 slk230 kompressor '84 Tamiya Falcon A democracy cannot exist as a permanent form of government. It can only exist until the voters discover that they can vote themselves largesse from the public treasury. From that moment on, the majority always votes for the candidates promising the most benefits from the public treasury with the result that a democracy always collapses over loose fiscal policy, always followed by a dictatorship. The average age of the world's greatest civilizations has been 200 years. |
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01-23-2005, 06:56 AM
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Join Date: Jul 2002
Location: Southern California
Posts: 5,067
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I'm sure your local auto a/c shop can sell you some of the tape.
On the evaporator housing, I drilled holes through the top and bottom where the clips would otherwise attach, and used sheet metal screws to close up the box. I think i drilled a slightly larger hole in the top of the box so that the screw could pass cleanly through, and then bite into the bottom half.
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1984 Targa |
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01-23-2005, 07:06 AM
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Im sure you have spoken with Diane at Performance Aire. She helped me greatly with all of the tricks and components. I got my whole system refurbished with new lines and their compressor.
You can probably match the tar tape at an hvac shop. I run R12 and haven't had a recharge since the refurbishment. That was five years ago. I live in the Dallas Texas area.
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78SC coupe, Silver Metallic |
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01-23-2005, 07:08 AM
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Registered
Join Date: Dec 2002
Location: Dahlonega , Georgia
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Thanks guys this board is great!!
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2002 Boxster S . Arctic silver + black top/int. Jake Raby 3.6 SS engine " the beast ". GT3 front bumper, GT3 side skirts and GT3 TEK rear diffuser. 1999 996 C4 coupe black/grey with FSI 3.8 engine . Rear diffuser , front spoiler lip with ducktail spoiler . |
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01-23-2005, 07:17 AM
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Silver 911SC
