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Old 05-09-2018, 09:25 PM   #51
PromiseRing
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A car has either and orifice or thermal expansion valve. Never both.

Get new seals, orifice, and drier.
Ordered the last 2 things. What seals?
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Old 05-09-2018, 10:13 PM   #52
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Green ones. Available anywhere. Replace any on hoses you break free.
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Old 05-09-2018, 10:28 PM   #53
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Green ones. Available anywhere. Replace any on hoses you break free.
Okay cool, I thought you meant seals in the compressor or something. I’ll just source of those locally when the other parts come in.
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Old 05-10-2018, 09:27 AM   #54
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Turns out my compressor on my 91 took a dump, suction-side pressures through the roof and it won't cycle...joy. Glad to see you're making headway, Promise.
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#mclovethesenuts

-My car: White 1991 244, 308k miles. B230F LH2.4, AW70, R134a retro. Thrush glasspack, anthracite refinished Coronas
-Wife's car: White 1990 244DL, T cam, 190k miles.B230F LH2.4, AW70 w/aux cooler, Duracool AC w/condenser fan, purple refinished Virgos, tow hitch, ipd wagon overload springs.
-PSM 2002 Subaru WRX wagon: 120k miles, Perrin TBE, Perrin turbo inlet, intake, and Y-pipe, GrimmSpeed cross pipe.
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Old 05-10-2018, 09:41 AM   #55
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Turns out my compressor on my 91 took a dump, suction-side pressures through the roof and it won't cycle...joy. Glad to see you're making headway, Promise.
No headway yet waiting for parts to arrive and who knows if my compressor is bunk.

Also I have been doing some research and emailed the ES12A company. I am going to get that rather than the duracool because it’s cheaper by a LOT. Also, you can (and are supposed to) charge the system at atmospheric pressure, NOT under vacuum. I was told that even after vacuuming the system, I won’t remove all that much oil. I will add maybe 2oz of ester oil while refills with ES12A.

Is there any way if me telling if my compressor is bad before dropping all this money into the system?
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Old 05-10-2018, 03:34 PM   #56
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Not overly sure on the 740 system, but on the 240, it has the pressure switch at the receiver drier. When you jump the two wires it will engage the clutch on the compressor and run(if it works).
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Old 05-10-2018, 04:21 PM   #57
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Not overly sure on the 740 system, but on the 240, it has the pressure switch at the receiver drier. When you jump the two wires it will engage the clutch on the compressor and run(if it works).
Yeah it runs fine but I donít think that means itís actually compressing. I jumped it and let the compressor run for up to 30 seconds straight and it created no pressure or heat in the condenser at all. Iím hoping it is just over or overfilled and thatís why.
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Old 05-10-2018, 04:39 PM   #58
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What is your pressure static(engine off for 5-10 minutes)? What is your pressure with the engine running, compressor off? What is your pressure with the engine running, compressor on?

If your static pressure is low, you most likely have a low charge. If you see no pressure change or a high pressure with the engine running it's most likely a failed compressor.
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Old 05-10-2018, 05:17 PM   #59
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I will report back later on, thank you.
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Old 05-19-2018, 02:42 PM   #60
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Today I replaced the receiver drier and vacuumed the system, then filled with ES12A. Air is pretty cool (not cold) after adding 2 cans. But now the compressor is on constantly when the ac is on. Any idea why?
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Old 05-19-2018, 10:19 PM   #61
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Old 05-19-2018, 10:39 PM   #62
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What is the weight that you put in?

What is the weight specification on the sticker under the hood?
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Old 05-19-2018, 11:43 PM   #63
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What is the weight that you put in?

What is the weight specification on the sticker under the hood?
I put in approximately 12oz (equivalent to 36oz of r134). I think spec might be like 42oz? (Equivalent to 14oz of ES12A). So I might be 2oz snort assuming I got ALL of the old Freon out. I didnít know if that would be enough to make the compressor do weird things.
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Old 05-20-2018, 02:57 AM   #64
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You still need to put a vacuum pump on it. To get all the old junk out of it and see if it holds with no leaks. you might be ok, Whats your gauges telling you?
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Old 05-20-2018, 09:41 AM   #65
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You still need to put a vacuum pump on it. To get all the old junk out of it and see if it holds with no leaks. you might be ok, Whats your gauges telling you?
I did that already after I replaced the receiver drier. I simply went bybweight of Freon rather than gauge readings since I canít get a high side reading. I returned the manifold gauge set to AutoZone already. Essentially i just want to know if itís normal for the compressor to run all the time with this stuff. Am I in danger?
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Old 05-21-2018, 05:22 PM   #66
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No, it's not normal.
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Old 05-21-2018, 09:29 PM   #67
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No, it's not normal.
Overfilled or underfilled

Iím going by weight not manifold pressures, considering I canít even get a high side reading.
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Old 05-21-2018, 11:14 PM   #68
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Quote:
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Overfilled or underfilled

Iím going by weight not manifold pressures, considering I canít even get a high side reading.
gotcha.
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Old 05-22-2018, 09:55 AM   #69
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I’ll try to get a manifold set soon and base it just off of the cold side. What pressure should I be looking for with the compressor OFF around 80F, and how about on?
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Old 05-22-2018, 11:41 AM   #70
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About 80 to 100 psi static and then about 30 psi when the compressor is on.

Does the high side get warm/hot to the touch and the low side get cold.
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Old 05-22-2018, 12:26 PM   #71
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Isn't it a PSI per degree for static? I'm so used to just looking at the gauges and knowing what correct looks like.
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Old 05-22-2018, 02:03 PM   #72
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Quote:
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About 80 to 100 psi static and then about 30 psi when the compressor is on.

Does the high side get warm/hot to the touch and the low side get cold.
Havenít checked. Away from the car now. Iíll check pressures later this week and add/remove if necessary.
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Old 05-22-2018, 04:33 PM   #73
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Just noticed a few minutes ago that her AC quality kind of sucked at idle, but would get colder when revved to 1500 rpm. She then said it was much colder while driving. I got out and saw her pusher fan spinning so I don't think this is an airflow issue. I believe this is indicative of being low on refrigerant.
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Old 05-22-2018, 05:55 PM   #74
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That also reeks of weak compressor.
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Old 05-22-2018, 06:34 PM   #75
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Sounds like a low charge to me. R12 capacity is 40 ounces. Converted to R134 would be about 32-35 ounces. With ES12, your charge should be 13-15 ounces.

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Quote:
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That also reeks of weak compressor.

Fear not, try adding some more refrigerant and see how it does. If it doesn't improve, I would start looking for a new compressor. Could also potentially be a partially clogged expansion valve.
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