My A/C compressor seized and I thought it would be a good time to
do the conversion to 134. I bought the conversion kit from groton,
and I went to the junk yard and pulled a nice looking seltec
compressor from a newer model 240.

I thought that I could empty the R12 oil from the compressor by
pouring it out, (some came out through the suction & discharge
ports and some through a port in the back) when I tried to add the
new oil from the kit, I could barely get 1/3 of it in.

It says on the Seltec compressor that it takes 200cc oil?
How can I make sure I get all the old oil out so that I can fill
the right amount of the new 134 oil?

The Seltec compressor is not yet installed in the car...
I am trying to do this without having to take it in to a shop...

appreciate any help/advice
Thanks,
JJ

Thanks for the replies and advice. I took another look at the Seltec compressor after work today and found that there was another port/plug on the back. I was able to drain more oil trough it and add all of the 200cc's of new oil. The original plug that I tried using looks like a pressure relief valve...

I forgot to mention that I had also pulled a nice looking condenser from the junk yard and it is already installed. In addition to the conversion kit, I also bought a seal kit with a nice assortment of o-rings for a 134 conversion.

The Volvo conversion kit does include a new drier/receiver, the metal can looking thing by the passenger side firewall.

I installed the Seltec compressor tonight, and tomorrow I will install the new metal can and valve adapter. I'll have to either buy a vacuum pump and some cans of 134 refrig. or take the car in some place to have the system vacumed and charged....

Thanks again!

JJ 87 745T - 271K

I hope I don't make this sound too daunting, but if your compressor seized, there will be contamination in the system. Possibly not much but there is some and it merits some attention. First I'm not sure if your system has the older variable orifice expansion valve with the receiver-dryer before the expansion valve or the fixed orifice with the accumulator(dryer) on the low side after the evaporator. If the dryer is on the high press. side it will have the contamination in it. If it is on the low side then possibly the contamination was caught in the screen before the expansion valve or the screen attached to the orifice. Did the kit come with a new dryer. If so you really just need to clean out the condensor and the screen(s) in the system. There are flushes(with all sorts of arguments pro and con) or you could just use compressed air and hope for the best. I would have thought that the compressor had a drain and a fill plug to add the oil. You should never put oil in through the suction and discharge ports. If you can't get it all in then put it in the dryer. Meanwhile if you have the system open all this while then there are other problems being created also. Esther oils are not as bad as PAG but it is hydroscopic and will absorb moisture rapidly if left open. One of the best oils to use (but expensive) is BG Products Frigi-Quiet. Someone mentioned pressures. Supposedly Freeze-12 has lower pressure but even thought it's moistly R-134, It requires certification to buy it. Have Fun

Hi JJ
In my experience, this stuff isn't exactly rocket science. Most likely, you have gotten most of the oil out of the comprssor. Most of the oil winds up in other places, like the hoses, the receiver-drier, condenser, etc. Put in what oil you can, rotate the compressor, put in a bit more, then install and hook up the lines. But be clean, clean, clean. Take the remainder of the 200 cc of oil and pour it somewhere in the system through any of the lines you remove to change o-rings. In my experience, some of the old oil hides in the evaporator--a little dried compressed air will blow it out (and all over the engine, but that's life.) The refrigerant will carry the oil throughout the system once the compressor starts. In general, you want to remove all of the old oil, but that's not possible, so do what you can. I have converted several systems and have had no problems. In my experience, the 88-up 760s have systems that handle the conversion better--but even mu old '84 670--with the ancient York one-lung compressor (looks like a stripped lawnmower engine) worked OK with the R-134a refrigerant. The condenser pressures are quite a bit higher than with the overall better R-12, but the Volvo condensers can handle it. Good luck.
-Steve