A/C compressor replacement

Tiny
ELVISJCRUZ
  • MEMBER
  • 2005 KIA SORENTO
  • 3.5L
  • V6
  • 2WD
  • AUTOMATIC
  • 148,000 MILES
I am replacing the air compressor and the condenser. The system still have freon. I have this 4CFM 1/3HP Air Vacuum Pump HVAC A/C Refrigeration Tool Kit AC with Leak Detector, Auto Repair Equipment, Manifold Gauge Set(R134A R22), 3 Hoses, Ideal for Food Packaging, Milking, Medical et kit from Amazon.

I have been reading and it seems that I can't use the vacuum pump to evacuate all the Freon.
This is my understanding of what I have to do.
1. Get the car to a mechanical shop to evacuate the system.
2. Remove and replace condenser and A/C compressor.
3. Vacuum the system with the vacuum pump to make remove all moisture at least for 30 minute then wait thirty minute to check that there is no leak in the system, then vacuum for 30 more minutes.
4. Put oil in the system throughout the yellow hose (qty. Per car specification).
5. Recharge the system with freon and a little bit of dye (qty. Per car specification).

Those are the main steps, there are some details in everyone of those steps that I am skipping. But my 2 questions are:

1. Can I do the first step with the vacuum?

2. Am I missing something?

3. What happens if after everything is done there is a leak, do I have to evacuate everything again?
Do you
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Tuesday, February 2nd, 2021 AT 8:06 AM

8 Replies

Tiny
ASEMASTER6371
  • EXPERT
Good afternoon,

No, you cannot use the vacuum pump to remove the Freon. You will damage it. It is only for evacuation prior to charging. Here is a guide to help you step by step with instructions in the diagrams below to show you how on your car.

https://www.2carpros.com/articles/replace-air-conditioner-compressor

and

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

You need to either have a shop recover the Freon or rent a recovery machine for the Freon.

Then you can continue on your repairs.

Roy

REMOVAL

1. If the compressor is marginally operable, run the engine at idle speed, and let the air conditioning work for a few minutes, then shut the engine off.
2. Disconnect the negative cable from the battery.
3. Recover the refrigerant with a recovery/charging station.
4. Loosen the drive belt.
5. Remove the discharge and suction hoses.

imageOpen In New TabZoom/Print

6. Disconnect the compressor clutch connector (A), and then remove 4 mounting bolts and the compressor.
Tightening torque :
20 - 25 Nm (2.0 - 2.5 kg-m, 14 - 18 lb-ft)

7. Install in the reverse order of removal, and note these items.

A. If you're installing a new compressor, drain all the refrigerant oil from the removed compressor, and measure its volume, Subtract the volume of drained oil from 200cc the result is the amount of oil you should drain from the new compressor (through the suction fitting).
B. Replace the O-rings with new ones at each fitting, and apply a thin coat of refrigerant oil before installing them. Be sure to use the right O-rings for R-134a to avoid leakage.
C. To avoid contamination, do not return the oil to the container once dispensed, and never mix it with other refrigerant oils.
D. Immediately after using the oil, replace the cap on the container and seal it to avoid moisture absorption.
E. Do not spill the refrigerant oil on the vehicle; it may damage the paint; if the refrigerant oil contacts the paint, wash it off immediately.
F. Adjust the drive belt.
G. Charge the system and test its performance.
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Tuesday, February 2nd, 2021 AT 1:38 PM
Tiny
ELVISJCRUZ
  • MEMBER
Thanks.

You are awesome!
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Monday, February 8th, 2021 AT 12:40 PM
Tiny
KEN L
  • ADMIN
ASEMASTER6371 is one of our best! Use 2CarPros anytime, we are here to help. Please tell a friend.
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Monday, February 8th, 2021 AT 12:40 PM
Tiny
FAMOUSROB
  • MEMBER
  • 2005 KIA SORENTO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 75,000 MILES
I would like to know how to properly change the A/C Compressor on the 2005 Kia Sorento. Any help you can give me would be greatly appreciated! Thank you!
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Tuesday, February 9th, 2021 AT 10:50 AM (Merged)
Tiny
MERLIN2021
  • EXPERT
Hello,

Here is a guide that will show you how to replace the compressor and the steps of vacuuming down and recharging the system.

Not vehicle specific, but charging the A/C system in all vehicles is similar

https://www.2carpros.com/articles/replace-air-conditioner-compressor

and

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

This can come out from the bottom or top but you will need to remove accessories.

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

Cheers
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Tuesday, February 9th, 2021 AT 10:50 AM (Merged)
Tiny
ELVISJCRUZ
  • MEMBER
I recharged but I forgot to stop at 21 ounces and I did put 24 ounces instead (2 little cans). What should I do since I went 3 ounces over? Thanks
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Sunday, February 28th, 2021 AT 4:23 PM
Tiny
ELVISJCRUZ
  • MEMBER
Also I used the artic frezee that says that it -stop leaks - it was the only that the had. Although when I vacuumed it didn’t have any leak.
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Sunday, February 28th, 2021 AT 4:26 PM
Tiny
ASEMASTER6371
  • EXPERT
Can you tell me the high and low side pressures so I can see if anything needs to be done?

Roy
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Monday, March 1st, 2021 AT 2:22 AM

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