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05-30-2019
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#1 |
 Join Date: Jul 2005
Location: Jupiter, Fl.
Posts: 815
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Need AC Evaporator Core for 91'
After switching over to R134, we detected a leak in the evaporator in my 91'.
I ordered a new one from a long time Corvette parts supplier here in Fl. That was an ordeal that I will gladly tell you about in the future, but it doesn't fit. We pulled it out, and it's going back, but I still need a NOS unit, or an AMERICAN MADE new one, or even a low miles used one. Jerry's doesn't list them, and I will look on EBay, but does anyone have a useable one on the shelf somewhere? It's like an oven down here. Thanks in advance, Bob.
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"It's about the car, not the people." 1991 ZR-1 White/Black #1236 (Owner since 1994). Stock engine with bolt-ons: Hurst shifter,"Forced Air" intake, Coplon duct, Bee Cool Radiator, Demon coils, Jeal prom, Watson headers, X pipe, 3" B&B's, Rippie flywheel, 4:10 gears, A molds, Toyo Proxes-R888's 12.06@117mph. 1.76 60ft. |
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05-30-2019
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#2 |
Join Date: Sep 2016
Location: Ocala, FL
Posts: 896
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Re: Need AC Evaporator Core for 91'
Contact Mirrock Corvette. They are a member here and specialize in C4 parts. It is a goal of theirs to know what fits what years. I met them at BG. Google search for the website.
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Steve Young 1991 ZR-1 Quasar Blue Metallic/Black #729 Second Owner 1991 ZR-1 Dark Red Metallic/Black #2040 SOLD 1990 ZR-1 Dark Red Metallic/Saddle #1670 SOLD Double your happiness.....complain half as much. |
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06-01-2019
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#3 |
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Join Date: Jul 2005
Location: Jupiter, Fl.
Posts: 815
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Re: Need AC Evaporator Core for 91'
Thanks Steve, I talked to Mark at Mirrock and he was very helpful. He’s keeps a dozen C4’s that he parts out, but no ZR-1’s at the moment.
BTW, Mark owns a 92’ ZR-1. I sent him pixs, and we determined that Eckler’s sent me a base model C4 evaporator. One of those parts that is definitely NOT interchangeable. Who knew? Their website claims, “Made in the USA”, but they forgot to pull off the sticker that says, Mgf. In China”. It has a stiff price over $250. Sent from my iPhone using ZR-1 Net Registry
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"It's about the car, not the people." 1991 ZR-1 White/Black #1236 (Owner since 1994). Stock engine with bolt-ons: Hurst shifter,"Forced Air" intake, Coplon duct, Bee Cool Radiator, Demon coils, Jeal prom, Watson headers, X pipe, 3" B&B's, Rippie flywheel, 4:10 gears, A molds, Toyo Proxes-R888's 12.06@117mph. 1.76 60ft. |
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06-01-2019
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#4 |
 
Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,165
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Re: Need AC Evaporator Core for 91'
The evaporator is different? What is different?
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
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06-01-2019
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#5 |
Join Date: Aug 2017
Location: Queens, NY
Posts: 164
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Re: Need AC Evaporator Core for 91'
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06-03-2019
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#6 |
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Join Date: Sep 2016
Location: Ocala, FL
Posts: 896
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Re: Need AC Evaporator Core for 91'
I spent quite a bit of time with Mark and Brooke at Bowling Green last month very smart couple. According to Mark's interchange tables on his website model years 90,91,92 have the same evaporator. Others on here have had good luck with Vette2Vette up in Illinois too. But, putting in a new part makes the most sense.
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Steve Young 1991 ZR-1 Quasar Blue Metallic/Black #729 Second Owner 1991 ZR-1 Dark Red Metallic/Black #2040 SOLD 1990 ZR-1 Dark Red Metallic/Saddle #1670 SOLD Double your happiness.....complain half as much. |
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06-05-2019
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#7 |
 
Join Date: Dec 2003
Location: Chicagoland,IL
Posts: 2,679
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Re: Need AC Evaporator Core for 91'
I might have one from a 1990.
Let me know if you still need one. Pete
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'91 #1635 PoloGreen 350 LT5 11.09 @ 129.27 11.04 @ 128.86 474RWHP 400RWTQ http://www.youtube.com/watch?v=SFNFOhGGlR4 http://www.youtube.com/watch?v=ZlRIOMwaDYY https://sites.google.com/site/peteszr1garage |
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06-07-2019
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#8 |
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Join Date: Jul 2005
Location: Jupiter, Fl.
Posts: 815
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Re: Need AC Evaporator Core for 91'
Thanks for the responses guys. I've got some side by side pix that I'll try to post.
The aluminum tube lines to the the core have the same fittings, but they are oriented differently and are not a bolt in fit. One is a different length too, and the connecting line to the compressor is a fixed length aluminum line with no flexible hoses to allow an easy mod. The fittings on the vertical line at the core are pointed in different directions too. In short, this is not a replacement for a ZR-1 evaporator core. Eckler's continues to claim that this is the correct part for a C4 ZR-1, even after seeing the pix I sent them. I'm getting a refund, but if anyone thinks about ordering one from them, ask for a couple of pix of the top of the core, you'll see the problem as I described. Note: The gray box is from Eckler's, the shiny one is the original from my car. http://www.zr1.net/forum/attachment....1&d=1559928623 http://www.zr1.net/forum/attachment....1&d=1559928623 Last edited by Bob Eyres; 06-07-2019 at 02:34 PM. |
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06-11-2019
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#9 |
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Join Date: Jul 2005
Location: Jupiter, Fl.
Posts: 815
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Re: Need AC Evaporator Core for 91'
Update:
Pete is sending me an evaporator he has off a 90'. If it passes a pressure test we'll use it. If I can't find a good used or NOS ZR-1 unit, I'll buy a base model 91' evaporator and graft the ZR-1 connecting tubes on it. But that sounds like too much work, 
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06-11-2019
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#10 |
Join Date: Jun 2015
Location: Morris, IL
Posts: 176
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Re: Need AC Evaporator Core for 91'
I bought one of these over the winter for my 91 ZR-1. A/C perfectly cold no issues.
It fit perfectly. I had to drill some small holes for mounting brackets. Surprising quality for the money. Shipped pressurized with nitrogen so you know it has coil integrity when you install it. Comes with new green o-rings also. Sent from my SM-G955U using ZR-1 Net Registry mobile app |
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