I almost jumped on this one until I read Larry's post and then the others.

I read your question differently. I think you are asking if we think its reasonable to not replace the evap but instead to hit it with stop leak and use 134 since even if it leaks you will be a good guy.

If thats your question then I have a couple pieces of advice. First don't use it if you have long term plans for the car. it's possible that the stop leak can cause some serious problems. it works using a silica compound that in the presence of moisture turns to glass beads. My partner tried some in his old 140 body last summer after adding refrigerant every monthfor a while. I noticed that he had some added Friday for the first time since last summer. He had never let the system get empty and probably had no moisture in it. It seems to reason that a system with moisture in it could have some catastrophic problems it the stuff started turning to glass beads inside the system.

The second point is that R134a has smaller molecules and leaks faster than R12.

__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician