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Banned
2007 Outback XT Ltd
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You may be right that there is a leak at the evaporator, but I sure would NOT recommend that you remove it yet. Before you commit to that, you need to buy or rent a sniffer - I have one of these and they work great.

Electronic Freon and Halogen Leak Detector

You can download the manual and read up on the tool: ... http://manuals.harborfreight.com/manuals/92000-92999/92514.pdf

A total leak down in 36 hours is a major leak, and this thing will definitely pinpoint it. It has seven sensitivity settings, so you can adjust for ambient conditions and the leak rate.

If you have to, you can drill a small hole in the evaporator housing close to the coil and stick the probe inside. That way you will 100% know that there is a problem. Can you imagine how you would feel if you spent many hours sweating and swearing, and found that the coil was OK?

Since your filter was missing, you need to flush the coil with Frigi-Clean. It's a great product, but shop around since prices are wildly variable. Of course, if you have to replace it, then you won't have to buy the cleaner. The cleaner is an expanding foam that you inject into that little hole you drilled....

BTW, did you check for dye dripping out from the evaporator drain tube?

I can send you the blower motor and evaporator removal pages (pdf format) from a 2007 service manual if you like - I don't know if there are any differences, but I suspect there are not.

Good luck.

John Davies
Spokane WA USA
 

·
Banned
2007 Outback XT Ltd
Joined
·
847 Posts
John, I would definitely be up for the manual, since we have an extra car, there is no pressure to complete this in a timely manner.
I charged the system enough after I posted to get the compressor to cycle and set the AC to high/max recirc. No doubt its the evap coil. I could smell the refrigerant stronglyfrom the vents. That being the case, I will check the drain tube for dye and report back.
John if you are able, PM me for email - Thanks
I sent the HVAC section in its entirety to your email address. Lots of luck on this one. Be sure to add that air filter. NAPA sells them at a discount, and if you buy during their periodic filter sales you can save 50% or more off their already low price. Maybe buy one at the regular price, then stock up when they go on sale later....

John Davies
Spokane WA USA
 

·
Banned
2007 Outback XT Ltd
Joined
·
847 Posts
So this is the coil, in the red is where there was a buch of oil accumulated and much more debris was on the coil. I wanted to take a picture of it as it was, but the friend, who was letting me use his evac equip took it and wiped it down after I handed it to him.
So is there a crack in the housing where you circled it? I'm having a little trouble understanding where the oil came from... normally you would see a leak at a threaded connection, or a stress crack failure at a fitting or weld.

Have you tried pressurizing it with shop air and doing a bubble leak test?

John Davies
Spokane WA
 
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