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Old 04-22-2013, 11:31 AM   #1
MgMidget72
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Member#: 57926
Join Date: Mar 2004
Chapter/Region: NESIC
Location: Connecticut
Vehicle:
2003 WRX Wagon
Sonic Yellow

Default A/C Leak Found - How to Fix?

I found out yesterday that I have a leak in the a/c system where the discharge pipe attaches to the compressor (part 10 http://www.subarupartsforyou.com/cp_...hp?partid=7314). Whatís involved in fixing this? Is it just a matter of getting the correct o-ring and replacing it, or is there more? Anything else I should do while the systems open? Whereís the best place locally to buy the o-ring. I have a long trip on Thursday and itís supposed to be warm here, so Iím hoping to do this quickly.

Background:
2003 WRX, 145,000 miles
For the past few years, this has just been a slow leak that Iíve been topping up or occasionally pumping the system down with a vacuum pump and doing a full recharge. Even when pumping it down, it held the vacuum after shutting off the pump. Yesterday, it was slowly loosing vacuum, but I thought Iíd try filling it anyway before it sucked in more air. Once I opened the knob on the gauges and the coolant started filling the system, I started to hear a hissing noise and turned off the knobs on the gauges and the bottle. The hiss was coming from the compressor, where the pipe to the condenser attaches.

Thanks,
Scott
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Old 04-22-2013, 03:22 PM   #2
Bacon117
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Just take it to a shop. You still have to pay them to draw a vacuum and fill the system.
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Old 04-22-2013, 03:48 PM   #3
MgMidget72
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Sonic Yellow

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Really?? For an o-ring??

Because of the leak, the system is empty already. I can draw the vacuum and fill the system myself. I just wanted to make sure that there isn't anything more to it than the o-ring, or if other things should be done at the same time.

Thanks,
Scott
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Old 04-22-2013, 06:52 PM   #4
yarrgh
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Black Diamond Pearl

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he mentioned a shop since most people don't have their own A/C equipment. If the system has been empty for a while, you might consider a new...drier. whatever the unit is called to remove moisture from the system.
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Old 04-22-2013, 10:39 PM   #5
Bacon117
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Quote:
Originally Posted by MgMidget72 View Post
Really?? For an o-ring??

Because of the leak, the system is empty already. I can draw the vacuum and fill the system myself. I just wanted to make sure that there isn't anything more to it than the o-ring, or if other things should be done at the same time.

Thanks,
Scott
As mentioned, most people don't invest in a/c equipment to be able to draw a vacuum. I assumed you would be taking it to a shop for this. Just to be clear, you are not just hooking up an R-134a canister from autozone, right? Please take no offense, I just want to be sure.
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Old 04-23-2013, 08:35 AM   #6
MgMidget72
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2003 WRX Wagon
Sonic Yellow

Default

Yes, I have the vacuum pump and correct gauge set to draw a vacuum down to what is required. Sorry I wasn't clear about that in my first post. Following the shop manual, what I've done before is draw the vacuum with the pump for 15 minutes, let it sit for a while, and then start charging the high side with the engine off. Once the can is empty or it won't take any more, I shut off the high side and charge through the low side with the engine & a/c running until I get the right amount of 134a into the system.

I was able to find an o-ring set for my car at A-Z yesterday. I got some PAG 100 oil in a bottle also to lube the o-rings.

At this point, I think I'll just replace the o-rings on each side of the compressor discharge pipe. yarrgh - thanks for the suggestion about the dryer, unfortunately I'm running low on time and need this to be a quick job. Anything else I should quickly check though? Should I add more oil to the compressor? The shop manual only says to add oil when replacing components, but I wasn't sure if the oil can get lost through a bad o-ring.

Thanks,
Scott
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