Hello,

My air conditioning in my Volvo 240 has a leak somewhere, I was going to replace the seals, etc. However, is it possible for me to just add PAG oil and R134a to my current system?

Anyone have any tips on how to convert to R134a?

Thank you!

 

Years ago when these cars were newer, we retrofit a lot of them prior to sale.

Our process was to flush the evaporator, condenser and line sets using 93% alcohol. I must warn you that this stuff is flammable but also evaporates quickly. So, if you are going to use it, you will need a flush gun, safety equipment and enough common sense to not catch yourself on fire.

For the compressor, we poured in the PAG oil and expelled the other oil out the other end.

When all done, we blew everything out with compressed air, replaced the drier and then all of the O-rings. Then, we pulled a vacuum for 45 minutes or so, checked for leaks, then recharged with oil and refrigerant.

It is a long process.

 

I've attached a picture. Has this already been retrofitted?

I know nothing about AC systems.

 

What year is your 240?

 

It's a 1992

 

Yours is the updated GM styled system that produces about 40% more cooling than the 1990 and earlier car. Congratulations on that.

Yours was R12 originally. 1993 and up were R134a but you can do a retrofit pretty easily.

Yours also has a CCOT system or "orifice tube" rather than an expansion valve, so you would need a few specialty tools to do this right. One that old needs a new orifice tube installed.