AC Expert question - Page 2 - ZR-1 Net Registry Forums

Subfixer · 07-29-2019

Another hose assembly built incorrectly from Brad's Corvettes.
This time, the coupling nut that attaches to the condenser was American thread, like 90-93, vs Metric for 94-95..... Ugh...…..

Anyone know the o-ring part number for the R12 compressor to compressor hose assembly? I'm going to swap the adaptors on the compressor and use one of the other wrongly built hose assemblies. At least those have the correct coupling nuts.
The R12 compressor has o-ring grooves in the adaptor and will not accept the captured O-rings within the aluminum washers.

Subfixer · 07-29-2019

Got the o-ring part number from Mark H.

Talking with him, we have come to the conclusion that all these "NOS" hose assemblies are probably items that GM parts departments rejected. Now the bad parts are out there and the vendors selling them don't know they are wrong.
I get the impression that these same vendors are restocking returned parts, even when informed they are wrong.

What a 3 month nightmare trying to get ready for Carlisle!

As always, buyer beware.

Subfixer · 08-07-2019

Quick note to update this thread...

Now have cold R134a AC.

Ended up swapping the plate on top of the R134a Compressor with the one from my old R12 Compressor.
Used the compressor hose assembly that had correct metric coupling nuts for the accumulator and condenser ends, and the incorrect R12 fitting on the compressor end.

All other parts were correct 94-95 R134a AC stuff.

Parts replaced (all 94-95 ZR-1):
Condenser
Evaporator
Compressor
Accumulator/Dryer
All 3 hose assemblies
All 3 switches.
Orifice/filter

Good Parts left over (90-93 ZR-1 R12 system)

Evaporator
All 3 hose assemblies
All 3 switches (not sure if they all work)
R12 Compressor is rebuildable (I think this is where my leak was, needs correct adaptor plate).

If anyone needs any of the above, hit me up.

tiegsd · 08-11-2019

Need a condenser for mine, might want to take it off your hands if it's in decent shape.

Sent from my SM-N920V using ZR-1 Net Registry mobile app

tiegsd · 08-11-2019

Would be for a '90, so not sure if it'll fit.

Sent from my SM-N920V using ZR-1 Net Registry mobile app

Subfixer · 08-12-2019

Quote:

Originally Posted by tiegsd

Would be for a '90, so not sure if it'll fit.

Sent from my SM-N920V using ZR-1 Net Registry mobile app

I'm not sure either, but you could stop by and see how it compares.

PM me for the address.

tiegsd · 08-17-2019

Many thanks for hooking me up with a condenser to replace my busted one. A step closer to working A.C. Thanks also for oil change help (sorry about the "fountain" of oil though)!

Sent from my SM-N920V using ZR-1 Net Registry mobile app

Subfixer · 08-17-2019

Quote:

Originally Posted by tiegsd

Many thanks for hooking me up with a condenser to replace my busted one. A step closer to working A.C. Thanks also for oil change help (sorry about the "fountain" of oil though)!

No problem, already cleaned up.
The Northeast guys should start our own mini mechanical group like the WAZOO guys.
My garage is always open.

dredgeguy · 08-17-2019

Question for you AC experts. Have a 92 but previous owner converted to R134. I think the AC compressor cycle switch is getting wacky and purchased a replacement to use with R134. Problem is it has metric threads and my car still has SAE. So far, all R134 switches have metric threads and R12 have the SAE threads which is what I need.
Am I looking for trouble using a R12 switch when my system is R134? I realize the pressures are set differently but looking for a solution.

-=Jeff=- · 08-17-2019

I thought the switches were adjustable

07-29-2019	#11
Subfixer Join Date: Sep 2018 Location: Groton, CT Posts: 379	Re: AC Expert question Another hose assembly built incorrectly from Brad's Corvettes. This time, the coupling nut that attaches to the condenser was American thread, like 90-93, vs Metric for 94-95..... Ugh...….. Anyone know the o-ring part number for the R12 compressor to compressor hose assembly? I'm going to swap the adaptors on the compressor and use one of the other wrongly built hose assemblies. At least those have the correct coupling nuts. The R12 compressor has o-ring grooves in the adaptor and will not accept the captured O-rings within the aluminum washers. __________________ 1992 ZR1 #442, 2 tops, White, White, Haibeck 415, 3.90 gear, Coilovers 2018 Audi RS5, 2.9 V6 Twin Turbo, Auto, Black, Black 2021 Audi Q3, 2.0T, 8 spd Tiptronic, Navarro Blue metallic, Pearl Beige

07-29-2019	#12
Subfixer Join Date: Sep 2018 Location: Groton, CT Posts: 379	Re: AC Expert question Got the o-ring part number from Mark H. Talking with him, we have come to the conclusion that all these "NOS" hose assemblies are probably items that GM parts departments rejected. Now the bad parts are out there and the vendors selling them don't know they are wrong. I get the impression that these same vendors are restocking returned parts, even when informed they are wrong. What a 3 month nightmare trying to get ready for Carlisle! As always, buyer beware. __________________ 1992 ZR1 #442, 2 tops, White, White, Haibeck 415, 3.90 gear, Coilovers 2018 Audi RS5, 2.9 V6 Twin Turbo, Auto, Black, Black 2021 Audi Q3, 2.0T, 8 spd Tiptronic, Navarro Blue metallic, Pearl Beige

08-07-2019	#13
Subfixer Join Date: Sep 2018 Location: Groton, CT Posts: 379	Re: AC Expert question Quick note to update this thread... Now have cold R134a AC. Ended up swapping the plate on top of the R134a Compressor with the one from my old R12 Compressor. Used the compressor hose assembly that had correct metric coupling nuts for the accumulator and condenser ends, and the incorrect R12 fitting on the compressor end. All other parts were correct 94-95 R134a AC stuff. Parts replaced (all 94-95 ZR-1): Condenser Evaporator Compressor Accumulator/Dryer All 3 hose assemblies All 3 switches. Orifice/filter Good Parts left over (90-93 ZR-1 R12 system) Evaporator All 3 hose assemblies All 3 switches (not sure if they all work) R12 Compressor is rebuildable (I think this is where my leak was, needs correct adaptor plate). If anyone needs any of the above, hit me up. __________________ 1992 ZR1 #442, 2 tops, White, White, Haibeck 415, 3.90 gear, Coilovers 2018 Audi RS5, 2.9 V6 Twin Turbo, Auto, Black, Black 2021 Audi Q3, 2.0T, 8 spd Tiptronic, Navarro Blue metallic, Pearl Beige Last edited by Subfixer; 08-17-2019 at 01:44 PM.

08-11-2019	#14
tiegsd Join Date: Jul 2017 Location: West Chester, PA Posts: 377	Re: AC Expert question Need a condenser for mine, might want to take it off your hands if it's in decent shape. Sent from my SM-N920V using ZR-1 Net Registry mobile app __________________ 1990 Black/Black ZR-1 #1155 1993 White/Red coupe (Regrettably sold)

08-11-2019	#15
tiegsd Join Date: Jul 2017 Location: West Chester, PA Posts: 377	Re: AC Expert question Would be for a '90, so not sure if it'll fit. Sent from my SM-N920V using ZR-1 Net Registry mobile app __________________ 1990 Black/Black ZR-1 #1155 1993 White/Red coupe (Regrettably sold)

08-17-2019	#17
tiegsd Join Date: Jul 2017 Location: West Chester, PA Posts: 377	Re: AC Expert question Many thanks for hooking me up with a condenser to replace my busted one. A step closer to working A.C. Thanks also for oil change help (sorry about the "fountain" of oil though)! Sent from my SM-N920V using ZR-1 Net Registry mobile app __________________ 1990 Black/Black ZR-1 #1155 1993 White/Red coupe (Regrettably sold)

08-17-2019	#19
dredgeguy Join Date: Aug 2012 Location: Ellicott City, MD Posts: 1,659	Re: AC Expert question Question for you AC experts. Have a 92 but previous owner converted to R134. I think the AC compressor cycle switch is getting wacky and purchased a replacement to use with R134. Problem is it has metric threads and my car still has SAE. So far, all R134 switches have metric threads and R12 have the SAE threads which is what I need. Am I looking for trouble using a R12 switch when my system is R134? I realize the pressures are set differently but looking for a solution. __________________ Charlie __________ Dredgeguy WAZOO Member 1992 Bright Red/Black ZR1 #246 Dana 4:10 gears Polished LT5 by Haibeck Polished Fikse FM5's with Michelin Pilot Sport 2 Stainless Works headers and cats with Corsa

08-17-2019	#20
-=Jeff=- Join Date: Jul 2007 Location: Bartlett, IL Posts: 7,149	Re: AC Expert question I thought the switches were adjustable __________________ 1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978