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Topic: INSTALLING A VALVE ON THE HEATER HOSES

in Forum: C3 Cooling and Heating Systems


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INSTALLING A VALVE ON THE HEATER HOSES (1/24)
 7/28/08 9:33pm
tinbender
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edgwood, MD - USA

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1975 convertible,with the hard top and power streering.it a 350 L48 with auto trans. the color is light blue.


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 THERE WAS A COUPLE OF POST ABOUT THE HEAT INSIDE THE CAR,THE REPLY WAS TO PUT  VALVES ON THE HEATER HOSES. DOSE ANYONE HAVE ANY PICTURES OF WHAT THIS LOOKS LIKE AFTER THEY ARE INSTALLED.I AM THINKING OF DOING THIS,BUT WOULD LIKE TO SEE HOW IT LOOKS FIRST.ALSO CAN ANYONE TELL ME THE DIFFERENCE BETWEEN THE VALVES FROM LOWES AND NAPA?
                                 RICK
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INSTALLING A VALVE ON THE HEATER HOSES (2/24)
 7/28/08 9:47pm
ranger3Lifetime Member
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North Charleston, SC - USA

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1975 L48 AT AC T-top


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NAPA has them. One is 5/8" and the other is 3/4". I cut the hoses under the car and the valves are out of sight. I makes a huge difference in radiant heat coming from the heater core.

Scott
INSTALLING A VALVE ON THE HEATER HOSES (3/24)
 7/28/08 10:46pm
KDADDY79
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Dutchess County, NY - USA

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RNB,
I recently got real interested in this, too. An unrelated problem (turned out to be in the distributor) caused me to loose my focus.
 
Ranger3,
By doing this job under the car, did you cut the hoses towards the rear of the engine compartment under the heater core?
By doing so, there is obviously no coolant entering back in to the motor via the Intake Manifold. Is this OK for the motor?
Does a lack of coolant in the heater core cause any issues once you open the valves again for the cool weather?
 
I think this sounds like a smart idea but I gotta go ahead and ask away on this.
 
Thanks,
Kevin 
INSTALLING A VALVE ON THE HEATER HOSES (4/24)
 7/28/08 10:59pm
NorskyLifetime Member
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West Burke, VT - USA

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Moving this thread to the Cooling & Heating Systems forum where other similar threads are.

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INSTALLING A VALVE ON THE HEATER HOSES (5/24)
 7/29/08 1:13am
suncountryLifetime Member
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Moses Lake, WA - USA

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1976 L48 4-spd, Mahogany Metalic exterior, Buckskin interior 350ci/350hp, 3rd owner, fiberglass spring, 255/50-16's Torq-Thrust II


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I installed the valves in the same area as the factory valve was located. This way I could open or close valves with out getting under the vette. So far I have had no issues with this.
INSTALLING A VALVE ON THE HEATER HOSES (6/24)
 7/29/08 7:59am
crossfire1982
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Cramerton, NC - USA

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black 1982 coupe slate gray interior, 350 crossfire, 1985 fuel pump, Steeroids R&P conversion


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I mounted mine under the car as well, near the heater core where the hoses make the turn upward to the core connectors.  I have to reach under the car to get to them but dont have to put it on ramps or jack it up to turn them on or off.  Turn them off in the spring, turn them back on in the fall.  I used the valves from NAPA but have seen some pretty good looking quarter turn valves from the hardware stores.  The valves from NAPA are UGLY !!! thats one reason I put mine under the car.
INSTALLING A VALVE ON THE HEATER HOSES (7/24)
 7/29/08 9:48am
DaveMLifetime Member
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Flanders, NJ - USA

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I think the NAPA valves look just fine, they are nice & compact. I had a valve fron Lowes, but it is a plumping valve and looks like Bubba issue.
I heard the Advance & Auto Zone have them for about half the price of NAPA's valves.
 
I have mine up top, just because it's easier Thumbs%20Up
 
Kevin, there is no problem using these valves, it will not harm the engine at all. Try it, you'll like it LOL
Dave


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INSTALLING A VALVE ON THE HEATER HOSES (8/24)
 7/29/08 4:01pm
tinbender
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edgwood, MD - USA

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1975 convertible,with the hard top and power streering.it a 350 L48 with auto trans. the color is light blue.


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First sorry  I wasn't sure were to post this, I will check out advance auto and auto zone then.
                                    Thanks
                                        Rick
INSTALLING A VALVE ON THE HEATER HOSES (9/24)
 7/29/08 9:54pm
KDADDY79
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Dutchess County, NY - USA

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OK. I'm gonna take the plunge!   Big%20smile
Thanks for the info. on Advance & Auto Zone vs. NAPA.
INSTALLING A VALVE ON THE HEATER HOSES (10/24)
 7/30/08 8:57pm
tuxblacrayLifetime Member
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Greensburg, IN - USA

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Jim G had some great information on this but it was long ago I am still searching for it. I believe he shot photo's of it as well. Maybe he will see this and post up.

Or..... ya'll could PM him......

For now this thread on HEAT should give ya what you need......Tuxblacray2008-07-30 18:21:16

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INSTALLING A VALVE ON THE HEATER HOSES (11/24)
 7/31/08 11:46am
rraider1
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Woodland, WA - USA

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I would like to ask a couple of questions on this to get good opinions. I replaced my stock vave and and replaced the little vacum shutoff valve behind the passenger dash and adjusted it . I know mine is working properly.
1. If the valve is shuting off the one line to the heater core, will heat still be present at the heater core with the other line open?
2. If it still would be present would it not be a good idea to place another vacum valve on the other line so both lines are shutoff?you would be able to place a tee for the vacum line and control both valves.
3. mine is a 77 are other years harder to get working properly?
INSTALLING A VALVE ON THE HEATER HOSES (12/24)
 7/31/08 4:14pm
ranger3Lifetime Member
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North Charleston, SC - USA

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1975 L48 AT AC T-top


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I still had a lot of radiant heat until I put a valve on both hoses. I have never had any problems since.


Scott
INSTALLING A VALVE ON THE HEATER HOSES (13/24)
 8/1/08 10:00am
tonyb47
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Suffern, NY - USA

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1976 restored,new interior,custom paint(purple),body kit,rebuilt engine,trans,upgraded sound system


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anybody have the part numbers for both valves from napa



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INSTALLING A VALVE ON THE HEATER HOSES (14/24)
 8/1/08 6:06pm
acplus
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, - Canada

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you can put a standard inline vacuum control heater valve in the input side of the heater core hose...but first check to see if you have vacuum to the valve when the heater is turned on...or no vacuum when the heater is turned on. There are two types of vacuum control valves one is called normally closed and the other normally open. If there is vacuum present when the heater is turned to hot then you will need the normally closed valve...if not you need the normally open valve...the valve should be inlet and outlet size for the 5/8" hoses. Hope this helps
INSTALLING A VALVE ON THE HEATER HOSES (15/24)
 8/1/08 10:14pm
crossfire1982
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Cramerton, NC - USA

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Part numbers for the valves at NAPA are 3/4 inch 660-1413 
5/8 inch 660-1414
INSTALLING A VALVE ON THE HEATER HOSES (16/24)
 8/1/08 10:16pm
tinbender
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edgwood, MD - USA

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1975 convertible,with the hard top and power streering.it a 350 L48 with auto trans. the color is light blue.


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I went to auto zone ,and the guy there couldn't find the part numbers in his computer. I'll try advance auto next.
INSTALLING A VALVE ON THE HEATER HOSES (17/24)
 8/2/08 7:41am
tb2k82ceLifetime Member
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Lemon Grove, CA - USA

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ACPLUS  John
 
Do you have any part numbers or sources? Can someone provide the amount of vaccum we should be getting? THis seems like a great way to not have to worry about turning it on or off manually. 
INSTALLING A VALVE ON THE HEATER HOSES (18/24)
 8/2/08 8:10am
JimGLifetime Member
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Gloucester, VA - USA

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[QUOTE=Tuxblacray]Jim G had some great information on this but it was long ago I am still searching for it. I believe he shot photo's of it as well. Maybe he will see this and post up.

Or..... ya'll could PM him......

For now this thread on HEAT should give ya what you need......[/QUOTE]

I'd have to go dig for the pics...or take some new ones. I have NAPA valves on both lines. 

Someone needs to wake me up when a post like this comes up. Been busy with the honey do list since I got back...


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INSTALLING A VALVE ON THE HEATER HOSES (19/24)
 8/2/08 10:19am
DaveMLifetime Member
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Flanders, NJ - USA

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[QUOTE=Tb2k82CE]ACPLUS  John
 
Do you have any part numbers or sources? Can someone provide the amount of vaccum we should be getting? THis seems like a great way to not have to worry about turning it on or off manually. 
[/QUOTE]
 
On the '82 the shut off valve closes when you turn the AC on. I don't know about the other years. That does not help when your cruising with the tops off and your feet are roasting. The best thing is to put both valves in.
Just one does not help because the heat migrates up the water in the open hose. You only need to close them in the spring and then open them in the fall, not much trouble at all.
Dave


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INSTALLING A VALVE ON THE HEATER HOSES (20/24)
 8/2/08 11:34am
tonyb47
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Suffern, NY - USA

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thanks for the part number, i also went to autozone and they had no idea what I was talking about, I also tried a local parts store with no luck

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INSTALLING A VALVE ON THE HEATER HOSES (21/24)
 8/2/08 3:31pm
suncountryLifetime Member
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Moses Lake, WA - USA

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I picked my valves up from NAPA. If your local NAPA does not stock them I am sure they can order a set for you. I had to put my valves where I can reach them easily. We get some wide temp swing here in the desert. In the spring its not uncommon to have cool mornings and hot afternoons.
INSTALLING A VALVE ON THE HEATER HOSES (22/24)
 8/2/08 7:41pm
terntes
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Little Rock, AR - USA

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I did mine also, last year, it makes a difference. It is super easy, the only thing is the valves I bought were only one size on inlet and outlet. So, I bought 5/8", it fit the small hose and I clamped it really tight on the large hose. I put one on each hose, right where the original valve is, all it takes is a sharp knife and a screwdriver and about 15 minutes. Just go to any auto parts store and ask for manual heater hose shut off valves. If they don't know what it is you want you don't need to do business there!
terntes
INSTALLING A VALVE ON THE HEATER HOSES (23/24)
 8/3/08 5:40pm
fp_vetter72Lifetime Member
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That's the problem now a days with these young kids working at part stores, you ask a question and if it aint in the puter it aint real. Drives me crazy sometimes trying to explain things to a guy or girl at the counter.I did this to my car also, used the NAPA valve's. One of the best mod's you can make for the money and time. Stops the phewin the car.

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INSTALLING A VALVE ON THE HEATER HOSES (24/24)
 8/3/08 8:07pm
tonyb47
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Suffern, NY - USA

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I saw daves napa valves on his car and agree they look ok, I saw another corvette which had regular big valves similiar what you would see on hot water heater and they looked terrible

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