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Discussion Starter · #1 ·
I have a leak somewhere on the '05 OBXT, and I cant find any trace of using Dye and UV in the engine compartment - I even removed the front grill to inspect the Condenser coil for damage and get a better look for leaks.
I charged the system using the highly controversial method of DIY and a R134 with dye, compressor was working once it had adequate pressure. In 36 hrs, system is back to 0.
Previously it took from ownership -Feb, until now to slowly leak down, So I thought it was an o-ring. but after that quick of a leak off there is zero sign of dye anywhere (I'm using a darkened garage and I can see the dye clear as day where the low pressure hook-up is).

My only other thought is that based on disassembling the glove box area and seeing no cabin filter, there must be a mess of debris in the evaporator and corroded a hole.

So does anyone have any ideas to DIY from here?
 

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Discussion Starter · #4 ·
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
 

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Discussion Starter · #6 ·
Thanks so much! I was actually at the point where I needed those instructions. I had the blower assembly out and was trying to figure out what to do next. Unfortunately while I was trying to figure out what's next, I spent about an hour disassembling the dash thinking it had to come out to get that huge box out :(
Tomorrow I will put the dash back together (at least I know how easy it comes apart now) and take the xt to my friends shop to have him evac all of the refrigerant, then I think I have about 10 min of pulling the evap coil to see if it is the culprit - it sure did smell like it - but I don't see any dye in the drain tube -meh-
 

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Discussion Starter · #7 ·
Evaporator out, and one side of it - the inward side was covered in debris... that was oily. Problem located - parts on the way!

Glad I did a system evac. The system holds about 14 oz of R134, my low pressure side had bled off due to the hole in the evap coil and the imbalance made the compressor not kick on. Based on that I figured the system was near empty - but we ended up recovering 10oz of the refigerant.
Parts get here Saturday, I will button it up - taking pictures along the way incase anyone else desires to DIY this or any related projects.
 

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Discussion Starter · #8 ·
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.
 

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Discussion Starter · #11 ·
Have you tried pressurizing it with shop air and doing a bubble leak test?

John Davies
Spokane WA
No, We didn't do any official tests to find the leak. I will once I get it back. I left if at my friends shop while waiting on parts. The area I circled was where the oil was, and it was enough oil that when the coil came out it was dripping off. That was what I wanted to photograph, but like I said, my friend wiped it off before I was able to get a picture.
I can only assume for now that there is a pinhole or a crack where one of the transfer tubes attaches to the body
 

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Discussion Starter · #13 ·
In case you don't have it yet, I will email what John sent me. I am a few days away from a detail photo/narrrative of the complete job which will also detail essentially dash console break down.
In the end it was my Evap coil, Suby is cooling very well now!
 
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