Hi, it's time the get the AC in my 92EXV up and running. Currently it's discharged.
I'd like to make sure the correct amount of oil is in the system after I flush it clean and dry.

How much oil should be in the AC system? I'm not sure the manual has this info. 120cc maybe?

Can I dump the total amount into the compressor?

thanks

 

You first may need to convert the system to R134a unless you have access to R12.

 

Now I see, the standards and service limits section, hey there's all sorts of info there!

THANKS!

So it's 205 - 225 cc AC compressor oil, cool, well cool soon perhaps.

As for refrigerant there is a third option, hydrocarbon refrigerants aka duracool & red tec etc.

 

My ac was also down when i got my car. I had to go to junk yard and get a pulley and then find a belt that would fit an underdrive pulley...after all that the compressor was so low that the clutch wasnt even engaging. It calls for 22oz of free-on. Well 2 cans make it 24 oz. I just put 2 cans in that had the oil mixed with it, and so far so good. Gauge reads right on the max fill line. I was also lucky enough that someone converted mine over to r134

 

It's 4 oz for the whole system. The oil amounts for each part are relevant only when replacing just that part.

You may want to replace condenser as it is very hard to get flushing solvent out of a parallel flow condenser. Also the design of the car leads to a lot of damage to the bottom part of the condenser from road debris. Even if it doesn't leak, when the fins are all munched up you lose performance.

Don't use HC. These cars convert well to R-134a, as the same parallel flow condenser used for the 94 and 95 was installed in the 92's and 93's running R-12. In other words you have exactly the same hardware that the factory R-134a ones do. The main issue is removing all the old oil which you've already done. It is also not hard to get R-12.

As far as initial oil distribution, put a bunch of it in the new receiver, the rest into the inlet of the compressor. Spin the compressor by hand after lines are attached to clear excess oil. Then it is important to have most of the refrigerant charge in before starting the system the first time so you get good refrigerant / oil flow back to the compressor. Charge as much as you can as liquid into the high side with the engine off.