R50/53 AC System Upgrade / Compressor Removal
AC System Upgrade / Compressor Removal
Hey NAM!
This all started when I was looking for the location to a split vacuum line! See my post (Need help identifying possible vacuum hose)
Anyway…
The car is in service mode, and everything has been removed. The SC / water pump, thermostat and old plastic housing soon, alternator, belt….You get the idea!
I’m so far in, that I’ve decided to tackle the AC system as well (compressor, condenser, the metal / rubber hose connections, etc)
With so much taken OFF the car already, what’s the easiest (and least costly way) to remove the refrigerant so I can disconnect everything? Obviously I can’t start the car to evacuate the system properly. Was looking for more of a DIY approach. The car has 150K on the clock, and I’m not afraid to get dirty as you can tell!
Give me some “old school” advice so I can get this all removed and make way for new parts!
Thx! You guys are the best!
This all started when I was looking for the location to a split vacuum line! See my post (Need help identifying possible vacuum hose)
Anyway…
The car is in service mode, and everything has been removed. The SC / water pump, thermostat and old plastic housing soon, alternator, belt….You get the idea!
I’m so far in, that I’ve decided to tackle the AC system as well (compressor, condenser, the metal / rubber hose connections, etc)
With so much taken OFF the car already, what’s the easiest (and least costly way) to remove the refrigerant so I can disconnect everything? Obviously I can’t start the car to evacuate the system properly. Was looking for more of a DIY approach. The car has 150K on the clock, and I’m not afraid to get dirty as you can tell!
Give me some “old school” advice so I can get this all removed and make way for new parts!
Thx! You guys are the best!
Yes, the AC works. Doesn’t blow as cold as I think it should LOL, but the hoses behind the radiator / fan / condenser assembly are showing considerable wear. They aren’t the nice looking rubber hoses as when new, and I don’t expect them to be. The compressor is probably original to the car (150k miles) and just like everything else right now, I may as well address these things. Does it need to be replaced? Maybe not. But like I said, I’m already here…It’s coming off one way or another LOL
Last edited by jcampbell6768; Mar 24, 2026 at 06:02 PM. Reason: Additional Information
um...the only EPA approved method would be to go to a service center and have it evacuated.
the wrong way that i am not recommending would be to release it to the atmosphere. but that's up to you and i am not responsible for you if you do it. lol
the wrong way that i am not recommending would be to release it to the atmosphere. but that's up to you and i am not responsible for you if you do it. lol
ok you might be going too far. however i know the feeling.
i would say you need to pull vacuum on the ac system. if it holds, run with it. if not, you can start replacing hoses, etc
note: this will not be the last time you are in service mode TRUST ME
i would say you need to pull vacuum on the ac system. if it holds, run with it. if not, you can start replacing hoses, etc
note: this will not be the last time you are in service mode TRUST ME
I’ve got most of the parts I need to complete the project (see my other posts)
I really just need to push pause and get this thing back on the road! HaHa
WTF!!!
He’s probably not someone I’d want working on my car! LOL
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If you have A/C gauges, first measure pressure in the system. You may not even have freon in the system. If so, just disconnect the hoses. Back in the day everyone just released it to the environment. If you decide to replace the suction line look for my most recent posts about the gigantic PITA it is to replace that hose. After doing it myself it was probably easier to just remove the engine first. As far as your compressor is concerned, if your A/C clutch engages I doubt you need a new compressor. Even then the A/C clutch (if it's not working) can be replaced without replacing the compressor. If you have no pressure your clutch will not engage (due to a low pressure switch that's part of the system). The clutch, to test it, can be jumped in the fuse box by removing the relay and fabbing a jump wire. More important is to go ahead and replace the condenser/dryer while you're at it.
Last edited by cooper48; Mar 27, 2026 at 05:57 PM.
As far as how well your car does or does not cool, my R53 cools pretty well up until outside temperatures go over 105 degrees. Where I live, that is basically June - September. So in the 105 - 115+ degree range that we see every summer, the A/C in my car is only good enough to barely stop me from sweating and be barely comfortable, not to mention the engine performance loss due to the additional drag on the little 1.6L engine with the compressor running. I've been through compressors and condensers and I've accepted that R53 will never cool as well as my other cars.
That's a huge EPA violation! A shop can be fined $35K if they get caught doing that.
As far as how well your car does or does not cool, my R53 cools pretty well up until outside temperatures go over 105 degrees. Where I live, that is basically June - September. So in the 105 - 115+ degree range that we see every summer, the A/C in my car is only good enough to barely stop me from sweating and be barely comfortable, not to mention the engine performance loss due to the additional drag on the little 1.6L engine with the compressor running. I've been through compressors and condensers and I've accepted that R53 will never cool as well as my other cars.
As far as how well your car does or does not cool, my R53 cools pretty well up until outside temperatures go over 105 degrees. Where I live, that is basically June - September. So in the 105 - 115+ degree range that we see every summer, the A/C in my car is only good enough to barely stop me from sweating and be barely comfortable, not to mention the engine performance loss due to the additional drag on the little 1.6L engine with the compressor running. I've been through compressors and condensers and I've accepted that R53 will never cool as well as my other cars.
And unfortunately, I don’t have a garage to park in, so the car sits out ALL THE TIME…I usually start the car and open the windows with the AC on high, while I go back inside the house for 5 minutes. HaHa!
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