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| xccter | New '71 A/C Hot Water Bypass Valve. 20* Colder at Registers :) | ||
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Senior Guru
 
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I know it's a repro valve from one of the usual suspects ($35), but the difference is AMAZING!
Now the evaporator and heater core aren't fighting each other. Don't know if anyone else has a 69-72 A/C car with so-so cooling, but this did the trick for me. Mark Attach file:  IMG01987-20120417-2058.jpg (260.22 KB) IMG01988-20120417-2109.jpg (210.06 KB) |
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Posted on: 2012/4/18 20:15
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´71 350/270 L48 Coupe Numbers Matching Ontario Orange 4 spd, Mid-year side pipes, deluxe black leather, ac, ps, pb, pw, tilt/tele steering wheel. 93k miles. Original rotors still riveted to the hubs! NCRS #48337 |
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| Matatk | Re: New '71 A/C Hot Water Bypass Valve. 20* Colder at Registers :) | ||
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Glad it worked! Is that a vacuum operated bypass that works off a switch? Manual or automatic?
I noticed since I've bypassed the heater core last week or so that the car runs about 10* cooler. |
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Posted on: 2012/4/18 23:52
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2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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| xccter | Re: New '71 A/C Hot Water Bypass Valve. 20* Colder at Registers :) | ||
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Senior Guru
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Yes it's vacuum operated.
The valve is always open UNLESS "MAX A/C" is selected, at which time vacuum is applied to the valve and it closes off the flow of hot coolant to the heater core. Mark |
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Posted on: 2012/4/19 1:01
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´71 350/270 L48 Coupe Numbers Matching Ontario Orange 4 spd, Mid-year side pipes, deluxe black leather, ac, ps, pb, pw, tilt/tele steering wheel. 93k miles. Original rotors still riveted to the hubs! NCRS #48337 |
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| Matatk | Re: New '71 A/C Hot Water Bypass Valve. 20* Colder at Registers :) | ||
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Good to know, thanks.
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Posted on: 2012/4/19 11:39
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2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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| Trae1976 | Re: New '71 A/C Hot Water Bypass Valve. 20* Colder at Registers :) | ||
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2012 Memorial Day Car Show Winner!
 
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Nice!
My original valve had expired as well. I've got a manual valve in mine right now and just open it for the cold days. When I finally get around to bringing my climate control system up to par, I may put one of those back in. Good to know it works as intended! |
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Posted on: 2012/4/19 11:55
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| xccter | Re: New '71 A/C Hot Water Bypass Valve. 20* Colder at Registers :) | ||
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Senior Guru
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Yeah. Yours is electric and plastic. Curious what kind of manual valve you're using?
http://www.zip-corvette.com/ProductDe ... ias=&ptct=SGR-SR&CTitle=& |
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Posted on: 2012/4/19 18:11
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´71 350/270 L48 Coupe Numbers Matching Ontario Orange 4 spd, Mid-year side pipes, deluxe black leather, ac, ps, pb, pw, tilt/tele steering wheel. 93k miles. Original rotors still riveted to the hubs! NCRS #48337 |
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| Trae1976 | Re: New '71 A/C Hot Water Bypass Valve. 20* Colder at Registers :) | ||
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2012 Memorial Day Car Show Winner!
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Quote:
xccter wrote: Just a basic ball valve, like this:  |
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Posted on: 2012/4/19 19:15
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