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5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

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Old 08-09-2011, 09:46 PM   #1
ITALIANO66669
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Vehicle: 1990 Ford Mustang GT
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Default A few questions about a/c.Please bear with me.

I have a 90 mustang gt.im wanting to reinstall a/c back in the car.I have the original compressor and the evaporator is still in the dash but no lines condensor,or dryer.What im trying to figure out is this,how do i know if i can reuse my compressor and evaporator?also if i can,where can i get the lines and dryer?i know i have to go r-134 and im pretty sure in 1990 they where using r-12 so obviously everything needs to be r134 compatable,thanks.
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Old 08-09-2011, 11:13 PM   #2
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you have to reassemble system and draw it into a vaccum and see if it holds vaccum = leak test, if it does install appropriate amount of ester oil, and r-134 a refrigerant which in a r-12 system will be 80% of the r-12 charge
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Old 08-09-2011, 11:15 PM   #3
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ok that makes sense.you wouldnt know where to find the hoses and dryer?i know i can get condenser easily.also how would i figure out what is 80% of the factory r-12 amount?
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Old 08-09-2011, 11:18 PM   #4
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What about the fitting to charge it? Doesn't the r12 use smaller fittings to charge with?
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Old 08-09-2011, 11:26 PM   #5
Bubba 95SN
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Charge ports are available in conversion kit. Hoses and accumulator at any parts house.
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Old 08-10-2011, 12:28 AM   #6
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Im gonna get in contact with late model resto,i saw on the site they sell replacement hoses so im gonna ask them if their hoses are updated for the high and low side fittings for r134 or if i have to buy a kit.i know under conversion kits they sell the hose wizard kits with compressor and all,im trying to avoid spending $750 bucks,at least at one time.Looks like im gonna be getting the accumulator/hose,other 2 hoses,1 is discharge and cant remember the other,ill be replacing the pressure switch for the hell of it.as far as the compressor i guess the thing to do would be to remove it from my car,drain the oil out and install the amount required.does anyone know if the oil amount is the same for r134 v/s r-12?if so how much and where can i get compressor oil?
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Old 08-10-2011, 06:51 AM   #7
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Quote:
Originally Posted by ITALIANO66669 View Post
Im gonna get in contact with late model resto,i saw on the site they sell replacement hoses so im gonna ask them if their hoses are updated for the high and low side fittings for r134 or if i have to buy a kit.i know under conversion kits they sell the hose wizard kits with compressor and all,im trying to avoid spending $750 bucks,at least at one time.Looks like im gonna be getting the accumulator/hose,other 2 hoses,1 is discharge and cant remember the other,ill be replacing the pressure switch for the hell of it.as far as the compressor i guess the thing to do would be to remove it from my car,drain the oil out and install the amount required.does anyone know if the oil amount is the same for r134 v/s r-12?if so how much and where can i get compressor oil?
oil amount is the same, ester oil at any parts store, if you have no way to draw system into a vaccum , let a pro do it, no air must be in the system when refrigerant charge is added
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Old 08-12-2011, 08:39 PM   #8
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i was planning on it.im not using autoparts store freon cause it has sealants in it.all im wanting to do really is get parts get them on the car flush the evaporator and the compressor and add oil then bring it to a shop i used to work at for the vacuum and recharge and all.
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Old 05-10-2012, 11:30 PM   #9
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Ok this an old thread but no need to start a new one. Since this thread had been posted,I declined going to stock route. This week I purchased the hose wizard kit. I plan on installing it tomorrow. I really need help on the wiring of this kit anyone please tell me the wiring.those of you that have the kit know the instructions are garbage and please don't post the mmff magazine link cause it doesn't answer my question.thanks
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Old 05-11-2012, 04:02 AM   #10
caaraa
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Outstanding thread, thanks all for joining. I'll visit often.
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Old 05-11-2012, 04:02 AM
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1990, 2005, 88, ac, charge, hose, in, kick, mustang, r12, seconds, takes, wiring, wizard

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