AC line leak help (1 Viewer)

[Goose17]

The AC lines below my passenger door are showing signs of leaking. I took off the insulation and the brackets and could not find the source of the leak. I took it to a local shop to have the AC recharged after replacing the AC condenser and they also could not find a leak and said the system held vacuum. Is this normal? Is it just condensation? Thanks

 

[Goose17]

Disregard - I found the leak. It was in the small line, just like I told the shop I thought it would be.

 

[excessive]

that certainly looks like the UV leak-detecting dye used in refrigerant. That is not normal.
if the truck is new to you, see how long the AC charge lasts before it stops working again, maybe it's a slow leak.

 

[Escape Artist]

Was it a hole in the small line or the fitting up above? Today I found exactly the same thing happening on mine.

 

[HotSoup]

Same here, same place, same problem. Small leak that needs refrigerant in the spring then again in the fall. I'd like to fix it but it looks like a pita to change

 

[Escape Artist]

Another good thread about this exactly - 'replacing rear ac lines- 100 series suggestions and observations'
replacing rear ac lines- 100 series suggestions and observations - https://forum.ih8mud.com/threads/replacing-rear-ac-lines-100-series-suggestions-and-observations.812405/post-15121833

 

[Goose17]

I just fixed it the other day. It was a hole in the small line on the side facing towards the vehicle. It was not fun. The line runs under the muffler and under a heat shield. I was planning on replacing the muffler, so I removed it.