Is my evaporator leaking?

[gkurey]

Hey guys...I'm replacing all my o-rings and a few AC system components for a R-134 conversion. I decided to pull out the evaporator to have a look at it and just check it over. I noticed some green stuff and general nastiness on the copper lines going into the core. I feel like that's probably indicative of a leak, but I want to be sure it isn't something else/normal. What do you guys think?



Thanks for looking!

[jlevie]

I don't know it that is a leak or not. Clean the crud off and pressure test the evaporator.

[gkurey]

Can most AC shops pressure test components?

[Chuck C]

That looks like AC leak-detector dye residue--whick means a leak.

[gkurey]

^^^ That's what I was thinking...probably not even worth the money to check. A friend of mine shot me a link from somewhere stating that compound material evaporators (like mine, aluminum and copper) commonly leak because each material has a different expansion/contraction rate and range so leaks form over time from cyclic wear. Makes sense...especially on a 23 y/o car.

[gkurey]

This replacement looks to be all aluminum...I may give it a try...I mean for 70 bucks?! Can't hurt. Hopefully it isn't of crappy construction though, haha!

http://www.ebay.com/itm/UAC-NEW-AC-EVAPORATOR-EV-5318ATC-/290540901597?pt=Motors_Car_Truck_Parts_Accessories&fits=Make%3ABMW|Year%3A1984&hash=item43a59654dd&vxp=mtr