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The steel 3/8" A/C nut on the liquid refrigerant pipe on the condenser side is corroded and stripped. I plan on cutting off the nut,putting a new one on, with a "Splice-loc" line repair coupling. A new line is available, but it looks much easier and safer than running into another cranky fitting, and possibly having to replace the evaporator also. Where can i find another nut! Anybody got an extra !!!
If the line measure 3/8" (0.375") O.D., you can use a 3/8" flare nut and backing sleeve (AN/MS #6). The threads should be the same. They are available in steel, aluminum and stainless steel. Use anti-seize compound or dielectric grease (tune-up or silicone) on the threads only, to prevent corrosion and future seizing.
Be careful! Aviation flares are 37 degrees whereas most automotive stuff is 45 degrees.Quote:
Originally Posted by DmaxMaverick
Correct, but it doesn't matter. The A/C fittings are O-ring sealed. All that's required is to hold it squarely in place with modest clamping force. A greater concern is using compression type fittings on the typically very soft and not-so-round A/C tubing. They are usually OK near straight ends if they haven't been damaged or bent. If the sleeve slides on, it should be fine. I don't know what aluminum is used, but it's significantly softer than aviation 5056 aluminum, and at the relatively low pressures, it doesn't present an issue.Quote:
Originally Posted by JohnC
An alternative is to replace the entire line set.