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A/C compressor engage with no freon?

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Old Jul 23, 2009 | 06:29 PM
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From: Eastern NC, USA
Default A/C compressor engage with no freon?

Trying to install A/c on my 93 Si with b16 swap. When i got the car everything was there but the compressor. Got one off a 94 delsol vtec that was told worked and trying to make sure all is well before i pay to have freon put in.
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Old Jul 23, 2009 | 09:14 PM
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Default Re: A/C compressor engage with no freon?

There is a saftey switch in the system, it wont start if theres no pressure..
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Old Jul 23, 2009 | 09:39 PM
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Default Re: A/C compressor engage with no freon?

jump the relay and engage the clutch, to make sure the clutch works. then you can try to spin the center of the pulley (not the outside of the pulley where the belt rides) to make sure it is not locked up.

Make sure whatever shop charges it adds some oil to the system. Also, its hard on a compressor sitting around unsealed. Dont be surprised if that thing locks up on ya soon.
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Old Jul 24, 2009 | 05:49 AM
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Default Re: A/C compressor engage with no freon?

Ditto the above^^^.

To test the compressor put some, [2oz] Ester oil, [you can also use C4 oil] into suction hole, [larger diameter hole] spin the pulley to test the bearing, should spin freely without any sound, then slowly turn compressor, [clutch plate] clockwise a few turns, there will be resistance but it should turn, now plug the suction and discharge holes with your fingers and turn the compressor a few more times, there should be suction on the suction hole side and pressure on the discharge hole side, now plug discharge hole and turn compressor, either the plug will pop or it will become very hard to turn compressor.

If all the above is good do as mentioned above, with the engine running jump the compressor relay, clutch should engage with no or very little noise from compressor, do not run compressor for more then a few sec. at a time and no more then a few times.

Total oil charge should be 5oz of PAG or Ester oil, depending on system, [I will let you know later] the 2 oz C4 oil is extra, either put in a full charge of oil yourself or let the shop recharging the system know what you have put in. 94
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Old Jul 24, 2009 | 07:52 AM
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Default Re: A/C compressor engage with no freon?

well as for it sitting, it maybe sat a week without being sealed, as soon as i got it i attatched my lines but no belt was used since i didnt trust the 2 bolt method since i had a b16 bracket at the time with the smaller compressor.

When i reinstalled in the other week with the new crv bracket i put about 4oz of the pag oil in it. I didnt know exactly where to pour it but i tried the hole on the right but the fluid would just run out so i put it in the left one and it took just fine. Where exactly is the relay to jump, i was trying to look online and in my haynes book but couldnt find it. And you said spin the clutch clockwise, isnt that reverse of how it normally spins since the motor spins counterclockwise. Oh and the pully spins fine with no noise specially since i got the crv bracket, the b16 one made the whole compressor vibrate a little so after about 5 minutes of idleing like that i took the belt off and ordered a crv bracket.
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Old Jul 25, 2009 | 02:03 PM
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Default Re: A/C compressor engage with no freon?

well the clutch spins freely anyway. I was getting ready to jump the relay and just tried to spin it for the hell of it when i was taking the splash gaurds off and it spins with no resistance with the relay still attached, so i take it this isnt normal?
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Old Jul 25, 2009 | 03:39 PM
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Default Re: A/C compressor engage with no freon?

The pulley should spin freely, [no belt] the clutch should turn with resistance.
I am a concerned that the compressor you have is the correct one for your engine, you said the engine spins counterclockwise, I have only been doing auto A/C for 3-4 years and have yet to run into a compressor that runs counterclockwise. 94
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