Hi,

I'm planning on changing my ac compressor. I got a used one from a local junker, it has 54K on it. My question is, is it okay to keep the lines open to air since I'm planning on chaing the oil in the compressor anyway. Also, anyone know the exact amount of PAG oil needed in the compressor? Thanks. Also, I'm going to change the orifice and see if there are any metal shavings coming from the compressor, hoping not. If not, do I stil need to change the drier? I just changed this part last year. Thanks!

Oh one more thing: Has anyone here successfully changed the compressor by just removing the belt and lossening the hose and bolts of the compressor? Planning on taking it from below rather than the top.

85 850 NA

 

You need to keep the dryer capped when you open the systen or it needs to be replaced.
If you remove the dryer from under the front the compressor will slide out the hole the dryer was in.

 

How about the amount of PAG oil in the compressor? Do you the exact amount? Also, what size O-rings should I get?

 

My book says 200ML on the oil.
Not sure of the size of the o-rings best to match up.

 

Tech has answered the oil bit and FCP Groton stocks the 'O' rings.

 

Sounds like you have the problem covered!!

 

Okay another question. I see two a/c hoses that needs to be disconnected from the compressor. What type of tools do I need to get it disonnected. It looks like an Allen wrench would do the trick???

Ooops!! I just looked at the VADIS pixs and it looks like the pipe couplings disconnects rather than taking the entire pipe from the compressor via Allen wrench. How do I disconnect the pipe couplings???

 

The couplers you need a special tool.
The lines from the compressor are I believe either a 5mm or 6mm allen.

 

Is it the a/c quick disconnect tool?

 

Yes you have a set?
If you have the white set you have to see which one it is.
If you have the folding color ones it is a black one.

 

Thanks. I can't wait to do this project this weekend! Need ac soon, about to get humid here in Charleston, SC

 

So I tried the black quick disconnect tool to the part I'm pointing at on this pix but no luck. Vadis diagrams shows that this part can be disconnected but I even tried brute force and the darn thing still wouldn't budge. Am I missing something here?

http://i25.photobucket.com/albums/c1.../PICT00992.jpg

 

you dont need to remove that, just undo the lines that are bolted to the compressor, they will be pretty tight, best to spray some lube on em and get a 6mm allen head in a socket, i always use a air ratchet, you dont need to use the disconnect tools tho, just undo the bolts from the compressor. put some oil in the compressor and put it back on.. its a pretty simple job, if you dont have a rack, i would take the coolant fan off and pull it out the top, if you do have a rack, loosen the drier (you dont have to take it off) just loosen it (10mm bolt that holds it tight) and it will move enough to get the compressor out from the bottom..

 

Somehow I got a little misguided on the post.
The quick disconnect was for the dryer. That would remove the dryer from the pipe on the top.
You are pointing to the crimp that holds the rubber hose to the metal pipe.
Sorry for me being misguided.

 

It's kicking my ***!!! Started at 7:30 and now it's 10:30. Finally just got the mounting bolts loosen and for some reason I don't have the freaking metric Allen wrench. So I'm off to Autozone. Also, I disonnected the line going to the evaporator the BIG one and expecting to see the orifice tube inside but no luck. I tried to disonnect the smaller pipe but that sucker wouldn't budge. The tool wouldn't go all the way in. So, where the heck id this orifice tube. I got one in hand but can't find the one in the a/c line. thanks!!

 

The orifice tube is in the smaller line down where it runs along the inside of the frame rail.
You will need a 19mm and 22mm or 7/8 wrench to loosen it.

 

This may help you, I dont replace any components when doing a A/C compressor or Evap unless needed, sometimes i replace the drier but only if it looks bad, the driers over time will rust from the inside out due to the acid that is produced from the bag. other than that i only replace parts as needed, i also usally vaccum down the system for up to an hour while im putting the car back together (for an Evap) and will do the same for a compressor.

http://volvospeed.com/Repair/ac.php

 

Thanks..and I just got back from Autozone. Finally got the Allen wrench fitting to come loose. I'm taking a lunch break and will try to get this ac compressor out. Will keep this board updated!!

 

Done..time 4:55pm. Well not all done. I'll change the orifice tube tom. When I got the old one out the exit holes were all burnt, nasty stuff that's not suppose to be in a compressor. So, the orifice tube probably got a lot of junk in it too. DEAD TIRED. But I did it!!!

 

lol, how long did it take you 8hrs? I guess thats what its all about tho, doing it yourself, congrats, only takes me about 30minutes for the actual changed, but by time you add in the recovering/vaccumm its about a 2 1/2 job.

but then again, i have all the tools and air and a rack.. so i guess im cheating a bit eh?