Pinhole in a/c line - Nissan Armada Forum: Armada & Infiniti QX56 Forums
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post #1 of 11 (permalink) Old 02-01-2016, 01:13 PM Thread Starter
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Pinhole in a/c line

After this "snow event" we just had in VA I saw a few drops of green in my driveway. I traced it down to a tiny Pinhole under the plastic bracket where the high-pressure line runs through it.
The dealer has the parts in stock to do the TSB compression fitting fix but I refuse to spend $800 for something I can do myself. I cutout the bad line and used two 5/16 compression fittings and a length of brake line to repair it. I pressurized the system with a can of freon I had laying around to make sure it held pressure before spending the money to have it vacuumed and charged. Pics below...

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post #2 of 11 (permalink) Old 02-01-2016, 01:51 PM Thread Starter
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Where the hole was found.
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post #3 of 11 (permalink) Old 02-01-2016, 01:52 PM Thread Starter
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Cut out bad section.
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post #4 of 11 (permalink) Old 02-01-2016, 01:53 PM Thread Starter
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New piece of line installed with compression fittings.
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post #5 of 11 (permalink) Old 02-04-2016, 09:34 AM
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Nice Job!

Can you post the parts and size of all fittings used? This may be helpful to others that may experience this.

2005 SE Off Road: JBA LT Silver ceramic coated headers, Cajun B-Pipes with Heavy Metal Cats, Borla Dual SS Cat Back, Uprev Tuned, K&N Air Charger, CSF 3328 Aluminum Radiator, Grille Craft Upper and Lower Grill, Burtman Rear Air Reflector, Manik SS Nerf Bars, Nissan Tow Mirrors, Bilstein HD's, Moog 81085 Rear Coils, AirLift 1000 Rear Springs.
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post #6 of 11 (permalink) Old 02-04-2016, 10:17 PM Thread Starter
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No problem. I used two brass 5/16 compression fittings and a length of 5/16 brake line. I got the fittings from Lowe's, and the brake line from Advance Auto Parts. I pressurized the system to test for leaks with a can of freon from Advance Auto Parts. It will build pressure QUICKLY so press the button in short bursts checking pressure periodicity.
***NOTE*** pressurizing the system in this case is simply to test/check your repair. The system will have to be vacuumed and pressurized by qualified personnel before normal operation.

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post #7 of 11 (permalink) Old 02-04-2016, 10:22 PM Thread Starter
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Here are the pieces used before they were installed...
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post #8 of 11 (permalink) Old 02-04-2016, 10:26 PM Thread Starter
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It's been 4 days since the repair and its held pressure perfectly. My friend who owns a shop will vacuum and charge the system for me, so all in all this repair will total out at less than $100 to include the freon.
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post #9 of 11 (permalink) Old 02-05-2016, 02:07 PM
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Thanks. Moderator should pin this.

2005 SE Off Road: JBA LT Silver ceramic coated headers, Cajun B-Pipes with Heavy Metal Cats, Borla Dual SS Cat Back, Uprev Tuned, K&N Air Charger, CSF 3328 Aluminum Radiator, Grille Craft Upper and Lower Grill, Burtman Rear Air Reflector, Manik SS Nerf Bars, Nissan Tow Mirrors, Bilstein HD's, Moog 81085 Rear Coils, AirLift 1000 Rear Springs.
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post #10 of 11 (permalink) Old 02-10-2016, 06:55 PM Thread Starter
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Quick update. The system has been vacuumed and recharged for a few days now with ZERO issues. Working like a champ.
My local dealer has the parts in to do the TSB repair that Nissan put out to address this issue but as I stated earlier, I am NOT spending $800 to have them do something that I can do by myself.
Yes. The rear A/C line corrosion is an issue that is known by Nissan. It seemingly occurs mainly to vehicles in the "salt" regions where chemicals are used on the roads in winter.
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