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Topic: Reduce interior heat w/ a hot water shut-off valve

in Forum: C3 Interior

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Reduce interior heat w/ a hot water shut-off valve

Posted: 7/9/04 10:32pm Message 1 of 21
C3RVETTE
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Anacortes, WA - USA
Joined: 12/16/2002
Posts: 1293
Vette(s): 1979 Red #72 C3 Corvette,T-350,Black interior,air,tilt/tele,K&N.And a 1978 Olds Cutlass 350/350,auto,air,2-dr.,buckets
http://temp.corvetteforum.net/c3/joeveto/Hot_Water_Shut-Off.shtml The last couple pics are missing,but a fairly good how-to guide... |smokin|


Jon,-Majestic Glass Corvette Club-....Red #72,blk.interior,1979 C3 Corvette-TH350,Weiand,Holley,glass tops,Pioneer,3.55's,K&N,Dynomax,Flowmaster 40's,Energy Suspension,Spicer,VB&P(pics soon); 1978 Olds Cutlass Supreme 350/350,Dk. Blue 2-door Coupe-Hotchkis,PST,K&N,XM...'99 Mitsubishi Galant GTZ V6,black/grey leather,intake,strut bars,tint... |IMG|http://www.msnusers.com/cutlasscorvetteworkinprogress/shoebox.msnw?action=ShowPhoto&PhotoID=63|/IMG|

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Reduce interior heat w/ a hot water shut-off valve

Posted: 7/10/04 5:58am Message 2 of 21
Big Fish
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Joined: 12/16/2003
Posts: 630
For what it's worth, you can buy a ball valve at Home Depo or Lowe's that already has the hose barbs as part of the casting. Cut the hose, install the valve, done for under 10 bucks. I personally prefer the hose barbs over the smooth stubs of copper tubing, less chance for the hose to blow off, and you really don't need the bleeder.


Reduce interior heat w/ a hot water shut-off valve

Posted: 7/10/04 10:17am Message 3 of 21
C3RVETTE
Former Member
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Anacortes, WA - USA
Joined: 12/16/2002
Posts: 1293
Vette(s): 1979 Red #72 C3 Corvette,T-350,Black interior,air,tilt/tele,K&N.And a 1978 Olds Cutlass 350/350,auto,air,2-dr.,buckets
Sounds good...Lowes,huh? Got one fairly close.Havent done this yet,but I need to.Which hose? Upper or lower? Probly upper... |idea|


Jon,-Majestic Glass Corvette Club-....Red #72,blk.interior,1979 C3 Corvette-TH350,Weiand,Holley,glass tops,Pioneer,3.55's,K&N,Dynomax,Flowmaster 40's,Energy Suspension,Spicer,VB&P(pics soon); 1978 Olds Cutlass Supreme 350/350,Dk. Blue 2-door Coupe-Hotchkis,PST,K&N,XM...'99 Mitsubishi Galant GTZ V6,black/grey leather,intake,strut bars,tint... |IMG|http://www.msnusers.com/cutlasscorvetteworkinprogress/shoebox.msnw?action=ShowPhoto&PhotoID=63|/IMG|

Reduce interior heat w/ a hot water shut-off valve

Posted: 7/10/04 10:25am Message 4 of 21
Big Fish
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Joined: 12/16/2003
Posts: 630
 C3RVETTE said: Sounds good...Lowes,huh? Got one fairly close.Havent done this yet,but I need to.Which hose? Upper or lower? Probly upper... |idea| 


Can't remember upper or lower, but you want to install in the 5/8" line. The other line is 3/4". |thumb|


Reduce interior heat w/ a hot water shut-off valve

Posted: 7/10/04 6:20pm Message 5 of 21
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FLA VETTE
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ORLANDO, FL - USA
Joined: 12/11/2002
Posts: 459
Vette(s): 1980 L82 Dark Metallic Green Coupe, Gymkhana Suspension, AM/FM/CB, GM ZZ383....nice....
You can also find the valve in Advanced Discount auto. I would recommend a screw type valve vs a quarter turn valve. I had the quarter turn ball valve from the PO and it leaked by. Installed a screw type and now I have tight shutoff.


 
1980 L82 (5069 made), Dark Green Metalic (844 made)
Gymkhana Suspension, AM/FM/CB, Sporting a ZZ383......... 

Reduce interior heat w/ a hot water shut-off valve

Posted: 7/10/04 8:14pm Message 6 of 21
C3RVETTE
Former Member
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Anacortes, WA - USA
Joined: 12/16/2002
Posts: 1293
Vette(s): 1979 Red #72 C3 Corvette,T-350,Black interior,air,tilt/tele,K&N.And a 1978 Olds Cutlass 350/350,auto,air,2-dr.,buckets
 FLA VETTE said: You can also find the valve in Advanced Discount auto. I would recommend a screw type valve vs a quarter turn valve. I had the quarter turn ball valve from the PO and it leaked by. Installed a screw type and now I have tight shutoff. 
I think you mean a gate valve.The screw down handle closes a "gate" in the valve body that shuts off flow.What size did you use?

|UPDATED|7/10/2004 8:14:20 PM (AZT)|/UPDATED|



Jon,-Majestic Glass Corvette Club-....Red #72,blk.interior,1979 C3 Corvette-TH350,Weiand,Holley,glass tops,Pioneer,3.55's,K&N,Dynomax,Flowmaster 40's,Energy Suspension,Spicer,VB&P(pics soon); 1978 Olds Cutlass Supreme 350/350,Dk. Blue 2-door Coupe-Hotchkis,PST,K&N,XM...'99 Mitsubishi Galant GTZ V6,black/grey leather,intake,strut bars,tint... |IMG|http://www.msnusers.com/cutlasscorvetteworkinprogress/shoebox.msnw?action=ShowPhoto&PhotoID=63|/IMG|

Reduce interior heat w/ a hot water shut-off valve

Posted: 7/10/04 8:31pm Message 7 of 21
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FLA VETTE
Former Member
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ORLANDO, FL - USA
Joined: 12/11/2002
Posts: 459
Vette(s): 1980 L82 Dark Metallic Green Coupe, Gymkhana Suspension, AM/FM/CB, GM ZZ383....nice....
Like Big Fish said, on the smaller of the two lines.


 
1980 L82 (5069 made), Dark Green Metalic (844 made)
Gymkhana Suspension, AM/FM/CB, Sporting a ZZ383......... 

Reduce interior heat w/ a hot water shut-off valve

Posted: 7/12/04 7:17pm Message 8 of 21
Steve
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CONCORD, MA - USA
Joined: 6/12/2002
Posts: 185
Vette(s): 78 Silver Anniversary (2 Tone) L82 auto loaded
You should have a vacuum operated valve that shuts off the heater water from the factory!
Steve |wavey|


Reduce interior heat w/ a hot water shut-off valve

Posted: 7/13/04 4:40am Message 9 of 21
vetteonr
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Southgate, MI - USA
Joined: 4/4/2003
Posts: 249
Vette(s): 1980 L48 4 speed.
Three questions:

1. Does it make that big of a difference?

2. How does it effect the engine cooling since you're cutting off part of the circulation system?

3. What effects will this have on the heater core and return hose if they are dry for a while?

|headscratch| |headscratch| |headscratch| |headscratch|


Corvette..........Enough Said!!!

Reduce interior heat w/ a hot water shut-off valve

Posted: 7/13/04 5:22am Message 10 of 21
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kstyer
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CUYAHOGA FALLS, OH - USA
Joined: 12/2/2003
Posts: 6424
Vette(s): 1975 C3 Red, T-Tops, Black Interior. All I need is time and money! Getting there!
1. Yes it makes a big difference.
2. It won't affect engine cooling at all. This is a factor with some cars, 4 cyl Mopars for example, but not a GM. Some GM factory set ups have a vacuum operated cutoff valve from the factory to shut off the heater when the A/C is on.
3. The core does not go dry, there is coolant in the other line and core. You just stop it from circulating. You should open it for a short time once in a while to keep from building sludge.

|UPDATED|7/13/2004 5:22:22 AM (AZT)|/UPDATED|



in Forum: C3 Interior


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