RX7Club.com - Mazda RX7 Forum - Re-installing A/C

RX7Club.com - Mazda RX7 Forum (https://www.rx7club.com/)

- 2nd Generation Specific (1986-1992) (https://www.rx7club.com/2nd-generation-specific-1986-1992-17/)

- - Re-installing A/C (https://www.rx7club.com/2nd-generation-specific-1986-1992-17/re-installing-c-520986/)

Quote:

Originally Posted by spot_skater

What's wrong with 134A?

It's got a slightly higher boiling point, that's about it... And it's cleaner.

R-134a is a shitty substitute for freon-it's made of a smaller molecule that can leak out of a system more easily and it's also less efficient as was already pointed out. It will be replaced by another shitty substitute by car manufacturers soon.

R-12 may contain CFCs, but it's certainly not illegal to use it in a car that was designed for it. If your system integrity is good there's no reason other than cost to use anything else.

You should NEVER use any other type of PAG oil than the one the compressor manufacturer specifies, there are lots of different blends out there for different systems. Using "any" oil will get you a torn up compressor in no time because "any" oil doesn't mix with refrigerants correctly...

Quote:

Originally Posted by Mills

exactly

Quote:

Originally Posted by geetarstar

I appologize for hijacking the thread but I have a question. I am also re-installing my a/c system for the first time. In the FSM, it says to uses "compressor oil" to lube the o-rings. Is there any other oil I can use to lube them as an alternative? also what can I use to clean the aluminum pipes safely?

Thanks.

Basically flush the compressor (I used mineral spirits) and then:
If using R134a you use either PAG or POE oil, and
if using R12 mineral oil 525 SUS viscoisty.

once done, mount it back and connect the a/c lines and charge up with freon. enjoy the cold air :D