A/C Charging with Easy Cheap Safe Alternative Refrigerant
#201
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Nah, feels the same. I cleaned all that out when replacing the expansion valve. I can't remember how my old FC blew, as that was 10 years ago. Its just not blowing like my other vehicles. Point I was making, is that you CAN use 134 and get cold a/c.
#202
Sharp Claws
iTrader: (30)
you can but you generally have to overcharge the system or run more more refrigerant to get desirable results versus other refrigerants with this antiquated system without updating parts.
for example i can run as little as 10 ounces and still have the readings within spec, blow ice cold and not cycle the compressor with 152. the systems i serviced all blew as cold as a brand new car with the standard 1lb charge level. our mercedes which had literally half a million miles blew the coldest with 152 than anything else. plus i despise getting *** raped by product suppliers, 134 has nearly tripled in price over the last decade as i can retrofit and charge with 152 for less than $10 out of pocket.
the problem probably lies either within the HVAC logicon or the blower motor resistor. checking and cleaning the blower motor also isn't all that difficult.
for example i can run as little as 10 ounces and still have the readings within spec, blow ice cold and not cycle the compressor with 152. the systems i serviced all blew as cold as a brand new car with the standard 1lb charge level. our mercedes which had literally half a million miles blew the coldest with 152 than anything else. plus i despise getting *** raped by product suppliers, 134 has nearly tripled in price over the last decade as i can retrofit and charge with 152 for less than $10 out of pocket.
the problem probably lies either within the HVAC logicon or the blower motor resistor. checking and cleaning the blower motor also isn't all that difficult.
Last edited by RotaryEvolution; 07-28-13 at 12:30 PM.
#203
Full Member
iTrader: (1)
Well I did my old 1957 frigidaire fridge with 152a today and so far so good! It's down in the 30s already and only been about 2 hours.
The only thing is, I believe on the last can, I unclamped the can tap before shutting off the valve. Did I just allow air to enter the system or did the check valve on the can tap close? Do I need to do it all over again so I can get the air out of the system? Everything sounds fine it seems, but I'm no expert.
The only thing is, I believe on the last can, I unclamped the can tap before shutting off the valve. Did I just allow air to enter the system or did the check valve on the can tap close? Do I need to do it all over again so I can get the air out of the system? Everything sounds fine it seems, but I'm no expert.
#205
Sharp Claws
iTrader: (30)
Well I did my old 1957 frigidaire fridge with 152a today and so far so good! It's down in the 30s already and only been about 2 hours.
The only thing is, I believe on the last can, I unclamped the can tap before shutting off the valve. Did I just allow air to enter the system or did the check valve on the can tap close? Do I need to do it all over again so I can get the air out of the system? Everything sounds fine it seems, but I'm no expert.
The only thing is, I believe on the last can, I unclamped the can tap before shutting off the valve. Did I just allow air to enter the system or did the check valve on the can tap close? Do I need to do it all over again so I can get the air out of the system? Everything sounds fine it seems, but I'm no expert.
#207
1991 S5 N/A Vert
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Jack, great info. MUCH appreciated. My A/C is working fine right now, but I know that won't be the case forever.
Seriously? CO2--the very thing they say is causing global warming will be used as a refrigerant!? That's as seriously screwed up as Jerry Garcia ties...
Seriously? CO2--the very thing they say is causing global warming will be used as a refrigerant!? That's as seriously screwed up as Jerry Garcia ties...
#208
Rotary Freak
iTrader: (4)
I thought it would be better to ask in here rather than make a new thread.
I have read this thread several times and the fsm.
The fsm calls for about 4oz of oil to be added to a new compressor. WHERE is the oil supposed to be added?
The inlet or outlet?
Or the plug in the middle of the top?
I have read this thread several times and the fsm.
The fsm calls for about 4oz of oil to be added to a new compressor. WHERE is the oil supposed to be added?
The inlet or outlet?
Or the plug in the middle of the top?
#217
Full Member
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I have no idea, I'm not a expert.
My question is, I received me new drier today and it has two caps on the ends and is under pressure. So, do I just take off the caps and try not to let that much pressure out by putting on the AC lines with new o-rings quickly? I really don't see any other way it would be done?
My question is, I received me new drier today and it has two caps on the ends and is under pressure. So, do I just take off the caps and try not to let that much pressure out by putting on the AC lines with new o-rings quickly? I really don't see any other way it would be done?
Last edited by turbowash; 08-23-13 at 05:32 PM.
#218
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I have no idea, I'm not a expert.
My question is, I received me new drier today and it has two caps on the ends and is under pressure. So, do I just take off the caps and try not to let that much pressure out by putting on the AC lines with new o-rings quickly? I really don't see any other way it would be done?
#222
What oil comes with Freeze 12? IDK
Freeze12 is R134a (which is not compatible with mineral oil) combined with 142b (which is compatible with mineral oil). the 142 carries the original mineral oil through the system. It is a band-aid, but it works. the 142 also reduces the head pressure somewhat so it works better in our cars.
Ester oil is compatible with 134a, Freeze12, R12, and R152a. This is what I use. flush the old Mineral oil out replace with Ester and you are good for any refrigerant.
Don't just add extra oil to the system in hopes it will band-aide you problem. It will contribute to high head pressures and reduce system performance
Never ever use PAG.
Ever.
Ever.
REally!
-Jack
Freeze12 is R134a (which is not compatible with mineral oil) combined with 142b (which is compatible with mineral oil). the 142 carries the original mineral oil through the system. It is a band-aid, but it works. the 142 also reduces the head pressure somewhat so it works better in our cars.
Ester oil is compatible with 134a, Freeze12, R12, and R152a. This is what I use. flush the old Mineral oil out replace with Ester and you are good for any refrigerant.
Don't just add extra oil to the system in hopes it will band-aide you problem. It will contribute to high head pressures and reduce system performance
Never ever use PAG.
Ever.
Ever.
REally!
-Jack
#224
I thought it would be better to ask in here rather than make a new thread.
I have read this thread several times and the fsm.
The fsm calls for about 4oz of oil to be added to a new compressor. WHERE is the oil supposed to be added?
The inlet or outlet?
Or the plug in the middle of the top?
I have read this thread several times and the fsm.
The fsm calls for about 4oz of oil to be added to a new compressor. WHERE is the oil supposed to be added?
The inlet or outlet?
Or the plug in the middle of the top?
IF the system is empty and completely clean, the full specified capacity of oil should be split in half. Half is added to the compressor, half is added to the dryer. Seal, Vacuum, charge.
If you are replacing the compressor and the dryer at the same time-you can assume the system is completely empty of oil.
If the system is NOT completely empty, it is a crap-shoot. Too much oil reduces system capacity, it can also slug your compressor on startup. Every dumbass with a system leak will add a can or two of oil with dye or 'leak sealer' to the system. Again, too much oil is bad!
FSM is assuming that the compressor is coming of a system with oil distrubuted through normal use. In that case, the compressor will have about 4 oz of oil sitting in it. Pull that compressor, add 4 oz to the new compressor and you are good to go.
Hope this helps.
#225
I thought I would post my two cents. I finally repairs my a/c system on my S5. Replaced compressor, replaced expansion valve, replaced receiver-dryer. I cleaned all the lines, the condenser and the evaporator. I then pulled vacuum down to 500 micron and waited. On scourge note, the oil in the pumps need to be changed regularly to keep them working well. I found no leaks then added small oil charge and then charged with R134A. My a/c blows 34-37 degrees on St Louis's hour and humid summer days. (90-95° 60-80%rh) I get I've cold air, but the blower doesent blow as had as I would like. The temp raised some at stops but it is still nice. I have converted other cars with good results as well. And 134 is cheap. $3.99 a can at Rural King.
You should let the Pope know about this. It's a miracle!