I'm replacing the A/C compressor. Do I really need to get the system evacuated? I bought it used and it never worked in the first place, so do I have to evacuate the old A/C system?

 

Before removing the compressor you must evacuate the system. After replacing the compressor you have to pull a vaccumm in the system and refill.

 

Thanks, I called around and will do it later this week.
Do you know how much oil goes in the replacement compressor?

 

Some of them come pre oiled. Read the instrutions that come with the comp. I'm guessing you got a rebuilt not a used one. If not I usually put about an ounce in the system.

 

Wow, your own shop? (I read your post about Maximus Tuning, and just saw your signiature) I was wondering how you made your car look soooo tight! Mad props!
On the original subject, a Max Forum friend of mine said that the replacement is an easy fix and I hope he is right. Do I really have to replace the Accumulator and O-rings?
Thanks,
-Walt

 

Thanks man. You should replace the reciever/dryer or accumulator whenever the system is exposed to the atmosphere. Replace any O-rings you remove (there cheap) and make sure you coat them with A/C oil. It really isn't that hard on a max but youll be one your back for a while.

Good luck

 

Thanks for the help, I already have the compressor all the way out but the stupid parts store gave me the wrong compressor. I'm sittin in agony waiting for the thing. BTW why do I have to replace the accumulator after exposing it to the atmosphere? And where do I put the orifice tube?

 

The rec/dryer may absorb moister from the air which will restrict flow of the refrigerant. You should also replace it if the compressor failes internally which could cause metal flakes to collect in the rec/dryer. As for the orifice tube, I don't believe there is one in our system. The older GM A/C systems used to utilize them however I don't think there found any new systems.

 

Gravy! Now I get an extra $60 back for a refund! They said I had to replace it for a stupid 1yr waranty, hmmm.
Thanks maximus!

 

Hey guys, I'm going to be replacing my compressor soon also and had a couple of questions.

What type of expansion valve does our car have? Shouldn't the system be flushed before pulling the vacuum and recharging?

 

I have a compressor for sale, check my homepage for details and pics.




no need to flush unless it is a conversion from R-12 or your car is really old and contaminated.

 

Yes the system should be flushed. From what I've learned you need to flush the system for two reasons 1) the most important, if your system is old the old compressor could leave metal flakes in there that will destroy your new compressor. 2) if you're near the car, and you release the R-134, it will replace the oxygen around you making it hard to breath (very bad).
What year Max do you have? If you have a '96 like me, make sure you get the right compressor. The Advance Auto morons had two listed for my year. The asses sold me the wrong one and I have to wait now.

 

I also think you need to flush to remove the old oil, so that you can replace with the proper amount of new oil. If you don't fulsh you don't know if you have to much/little oil in the system.

From what I've read on mobile air conditioning forums you should avoid "Four Seasons" compressors. "Four Seasons" is the largest aftermarket A/C company, but they have a bad record with the pro's. Their other (non-moving) parts seem to be OK. This is just based on what I've read and not from my own experience.

Still trying to find out what type of expansion valve we have in our cars... anyone?