A/C question...
08-23-2012, 12:55 PM
#16
Three Wheelin'
08-23-2012, 01:02 PM
#17
Three Wheelin'
Yes this is how it is on my '89 Turbo. Low pressure port is on the compressor, on the left side of the compressor (from driver's pov), and is pointing downwards. High pressure port on the line near the strut tower.
It is different on the early cars as far as I know but I'd be very surprised if the 89s are not all the same.
It is different on the early cars as far as I know but I'd be very surprised if the 89s are not all the same.
08-23-2012, 01:07 PM
#18
Three Wheelin'
08-23-2012, 01:39 PM
#19
Racer
Thread Starter
Thank you guys for shedding some light on this... Which leads me to another question however...
As my shop guy assumed the upper filler valve was the low pressure line, and that there was no high pressure filler valve, he charged the refrigerant through that and was obviously unable to attach his other filler hose anywhere..
Would that make a difference in deciding whether my A/C was working or not, or in charging the system properly..? Or does it not make any difference at all..?
As my shop guy assumed the upper filler valve was the low pressure line, and that there was no high pressure filler valve, he charged the refrigerant through that and was obviously unable to attach his other filler hose anywhere..
Would that make a difference in deciding whether my A/C was working or not, or in charging the system properly..? Or does it not make any difference at all..?
08-23-2012, 01:45 PM
#20
Three Wheelin'
Thank you guys for shedding some light on this... Which leads me to another question however...
As my shop guy assumed the upper filler valve was the low pressure line, and that there was no high pressure filler valve, he charged the refrigerant through that and was obviously unable to attach his other filler hose anywhere..
Would that make a difference in deciding whether my A/C was working or not, or in charging the system properly..? Or does it not make any difference at all..?
As my shop guy assumed the upper filler valve was the low pressure line, and that there was no high pressure filler valve, he charged the refrigerant through that and was obviously unable to attach his other filler hose anywhere..
Would that make a difference in deciding whether my A/C was working or not, or in charging the system properly..? Or does it not make any difference at all..?
08-23-2012, 05:43 PM
#22
Three Wheelin'
You need to go somewhere else! Soon as he said only one port...it was time to leave. There is a setpiont for the low side and the high side pressure sooooooooooo.....
08-23-2012, 06:19 PM
#23
Racer
Thread Starter
Well, a second opinion sounds like a good advice... Even though the noise from the compressor is probably not gonna go away by that...
Thanks for educating me on our cars A/C system...
Thanks for educating me on our cars A/C system...
08-26-2012, 04:44 PM
#24
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? ? ?
The stock Denso compressor as well as the Kuehl have no issues at 'high rpms'. These units have been running on 924s,944,951 for eons. The more common issues that affect (effect) compressor life are: excessive high side pressures or lack of oil flow (low refrigerant levels); constant 'topping off' without adding oil. Add to the problem a compressor with 100k+ miles on it, they were not designed to last that long, some may but most don't.
Most systems do not have to be 'topped off' annually, if they do then obviously you have a severe leak, so fix the leak.
Rapid cycling is not normal and wears out the clutch whether its at low or high rpms.
The stock Denso compressor as well as the Kuehl have no issues at 'high rpms'. These units have been running on 924s,944,951 for eons. The more common issues that affect (effect) compressor life are: excessive high side pressures or lack of oil flow (low refrigerant levels); constant 'topping off' without adding oil. Add to the problem a compressor with 100k+ miles on it, they were not designed to last that long, some may but most don't.
Most systems do not have to be 'topped off' annually, if they do then obviously you have a severe leak, so fix the leak.
Rapid cycling is not normal and wears out the clutch whether its at low or high rpms.
08-26-2012, 04:45 PM
#25
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Not sure about filling from the high side, but I would say that is not the issue here - the r134a fittings are different for the high side and low side, so there is no way you can mistake the high side for the low side. That would suggest that maybe he doesn't know his way around a/c systems too well? It might be worth getting a second opinion from an a/c specialist.
08-26-2012, 05:07 PM
#26
Three Wheelin'
OH well if it's pile on time! That guy needs to get out of the business before he blows himself or a customers car up! I mean come on only one port? How does he think the system works...magic?
12-30-2012, 04:15 PM
#27
Rennlist Member
I have an 83 Normally aspirated 2.5 that I am doing some resto on. I am looking for a source for an A/C clutch assy. I've been all over E-Bay and several of their stores there. I need to know a couple of specific things about it. After removing the clutch bearing, there are remnants of a seal? I think, just the metal shell was left and no rubber or numbers. Can anyone shed light on this piece? The compressor turns over easily, but the bearing was shot, so I pulled off the clutch assy to change it. The clutch coil shows current transfer and the system still has R-12 in it. I will probably change it over to 134-A while I'm at it. All parts have been cleaned and bead blasted, so they are ready to go back together.
In regards to filling an A/C system from the high side, it can be done, but with the engine off. Normally the systems are filled from the low pressure side. This is true in 134 A and R-12 systems. If filling from the low side, do not turn the can upside down. It will fluid slug the compressor valves and damage the compressor. Just rock the can from 9 O'clock to 3 o'clock position. If ice forms on the outside, that's OK. just put the can in the wash air from the fans and warm it up. this will boil off more fluid into gas and cut down on the recharge time. When the can feels warm...it's empty. For more info get a Haynes A/C techbook.
In regards to filling an A/C system from the high side, it can be done, but with the engine off. Normally the systems are filled from the low pressure side. This is true in 134 A and R-12 systems. If filling from the low side, do not turn the can upside down. It will fluid slug the compressor valves and damage the compressor. Just rock the can from 9 O'clock to 3 o'clock position. If ice forms on the outside, that's OK. just put the can in the wash air from the fans and warm it up. this will boil off more fluid into gas and cut down on the recharge time. When the can feels warm...it's empty. For more info get a Haynes A/C techbook.
