AC Failure & Restoration questions

[t_g_farrell]

Pete, we should talk at DGGR unless you are fixing it before.

You need a new dryer, expansion valve, green orings (forget the name for the compound,
compressor and hoses. The old hoses will leak anything with smaller molecules than R12
(which is 134A and R152A).

I was going to mention the R152A, its almost the same temp curves as R12, so no need
for a larger condensor. Its cheap, just go to Staples and and get a 3 pack of the Dustoff
spray, just make sure it says it has R152A. You can buy a vampire tapping tool to use
when feed the duster into the system. HF carries them and you can get them on ebay.
I use the HF vacuum device thats driven by my compressor to evacuate and it works
just fine and its cheap.


You want to use ester oil for the new oil too ( I think, I'll have to verify).

The link to the 152 post on the other forum is:https://www.rx7club.com/1st-gen-arch...gerant-997918/

If you want blow by blow instructions let me know and I can post em up here.
I've done this to 3 vehicles so far and all 3 have been working well for years.

[Pete_89T2]

Originally Posted by t_g_farrell

Pete, we should talk at DGGR unless you are fixing it before.

Oh, we'll be talking about this at DGRR, since there's no way in hell I'm going to find the time to get this job done before DGRR

Originally Posted by t_g_farrell

You need a new dryer, expansion valve, green orings (forget the name for the compound,
compressor and hoses. The old hoses will leak anything with smaller molecules than R12
(which is 134A and R152A).

Tracking on all of the above.

Originally Posted by t_g_farrell

I was going to mention the R152A, its almost the same temp curves as R12, so no need
for a larger condensor. Its cheap, just go to Staples and and get a 3 pack of the Dustoff
spray, just make sure it says it has R152A. You can buy a vampire tapping tool to use
when feed the duster into the system. HF carries them and you can get them on ebay.
I use the HF vacuum device thats driven by my compressor to evacuate and it works
just fine and its cheap.


You want to use ester oil for the new oil too ( I think, I'll have to verify).

The link to the 152 post on the other forum is:https://www.rx7club.com/1st-gen-arch...gerant-997918/

If you want blow by blow instructions let me know and I can post em up here.
I've done this to 3 vehicles so far and all 3 have been working well for years.

That R152A link was very informative; presuming all my reused parts (especially the condenser) can be flushed/cleaned out adequately, switching to R152A gets me the performance of R12 without having to get a new condenser.