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Discussion Starter #1
I am going to change the A/C Compressor and Receiver/Dryer by myself. I am very mechanically inclined, but I have never done this before. Will this be easy? I just have a few questions:
- I know I have to put 4.8 oz of oil into the new compressor and dryer. But I don't know where. Does it matter if I put it in the high side or the low side?
- Does it matter which tube I put the 1 oz of oil in the dryer/receiver?
- How many o-rings or gaskets to I need to change?, If you have part#'s that would help.
- do you think I can have a shop evacuate the system for me, then I can bring it home and fill w/134a?
- How much do you think the shop will charge for an evacuation?
Any other tips or tricks would be greatly appreciated!!
Thanks,
Chris
 

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The compressor itself is easy to change. a few bolts and its done. The refilling is not too bad if you by a refill kit which incluses the high/low lines.
 

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up4speed said:
I am going to change the A/C Compressor and Receiver/Dryer by myself. I am very mechanically inclined, but I have never done this before. Will this be easy? I just have a few questions:
- I know I have to put 4.8 oz of oil into the new compressor and dryer. But I don't know where. Does it matter if I put it in the high side or the low side?
- Does it matter which tube I put the 1 oz of oil in the dryer/receiver?
- How many o-rings or gaskets to I need to change?, If you have part#'s that would help.
- do you think I can have a shop evacuate the system for me, then I can bring it home and fill w/134a?
- How much do you think the shop will charge for an evacuation?
Any other tips or tricks would be greatly appreciated!!
Thanks,
Chris
does the compressor still function?
also is there anything left in the system, i assume the reason for the line change is a hole..

if theres a hole, then you don't need to go to shop *obvious reasons* r134a is not harmful to the environment like r-12 was..

i would have a shop preform a leak test on the system, it will show u where u need to get new seals..

the system will need to be pressurized for that thou..

just a few thoughts..
 

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Discussion Starter #4
I have to change the compressor, it is seized!!
Don't I have to evacuate all of the moisture before I fill it with 134a? Can I just install the components, then fill with 134a? Has anyone had good long term luck just filling w/o evacuating?
 

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you cant fill the system without evacuating it. if you open the lines you have to get it done before filling back up with 134A. sorry there is no other way
 

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ottowrkr said:
you cant fill the system without evacuating it. if you open the lines you have to get it done before filling back up with 134A. sorry there is no other way
which would be done after he changes teh compressor of course..

pointless to evacuate the system and THEN take the compressor out.. heh
 

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once you crack the lines to remove the old compressor then its no loner pressurized or have any thing left to evac. if the compressor had siezed then i doubt that its still pressurized. but on the off chance i would get it tested so you would only have to replace as little as you need to most times its little "O" ringsa that just dry out fomr time and age and then make the A/C system leak out in to the vast open space of the world.
 

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Be careful how much oil you put in the system if you are not going to flush it . if you overfill it it will impair the cooling capabilities of the system. i don't know the specifics but the system requires 4.8oz of oil, however when you discharge the system oil will remain in the evaparator , condensor, compressor and reciever/dryer. most of the time when you replace the compressor they recommend draining all of the oil into a measuring cup and adding the same amount + .5 oz. same goes for the reciever/dryer. but, if your compressor siezed it may be in your best interest to flush the entire system, to get out pieces of the failed compressor. also on the Chrysler system it is always a good idea to replace the expansion valve(it is mounted on the cowl where the A/C lines attach)they are prone to fail and it's pretty easy to change when the system is discharged. I replaced the condenser and reciever/dryer on my '93 and ran into some of this..
 

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Veeb0rg said
.which would be done after he changes teh compressor of course..

pointless to evacuate the system and THEN take the compressor out.. heh.
If you look at up4speeds post he asked
Can I just install the components, then fill with 134a ? Has anyone had good long term luck just filling w/o evacuating?
I said no you cant just fill it with 134A after you change the compressor you must get the system evacuated , whats wrong with that ??:confused: :confused:
 

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Discussion Starter #10
The other people apparently thought that I meant to evacuate the old 134a out of the system. What I meant was to evacuate moisture and impurities out of an "empty" system. Oh well, it looks like I'm going to have a mechanic friend do the job anyway. I just discovered that I need a new radiator, so I will just get both things done at once.
 
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