valve on the heater core hose - The 1947 - Present Chevrolet & GMC Truck Message Board Network

kenele · 08-27-2002, 08:50 PM

I have a problem with hot air constantly coming out of the vents in my truck . I heard mention of a valve that can be placed on the heater core hose that shuts off the flow of water to the heater core when not in use. Is this a stock item that someone has removed from my truck or is it an aftermerket idea? Does anyone know how they work , are they manually operated or vacuum operated?

Longhorn Man · 08-27-2002, 08:58 PM

Think of it like installing a water spicket in your hose, it works the same way.
20 bucks at napa.

Alex Hayley · 08-27-2002, 09:00 PM

Which hose is that valve installed on?

kenele · 08-27-2002, 09:04 PM

is there a switch in the cab?

Mountain Man · 08-27-2002, 09:16 PM

I have installed a shut off valve on my truck for the same reason, hot air in the cab.

I have a non/ac cab, so I installed the valve on the lower heater hose, the one from the intake manifold. This is the one that flows into the heater core. The upper one is the return hose to the water pump.

Just splice into the heater hose, and install a ball type shut off valve. The one I used was in the plumbing section at home depot. It is even gold and chrome colored, and looks good. It is actually brass inside. Approx $12.

Works great. I have an engine pic on file that I can attach, but you can barely see the valve:

Jesse 67 c-10 · 08-27-2002, 09:20 PM

go to a hardware store and get yourself a 1/2" ball valve, 2 barbed fittings to fit your hose size that screw into the valve, and 2 hose clamps. cut your heater hose, shouldn't matter which one, plumb it in, start and warm up motor with valve open and check for leaks, shut it off when you dont want heat. simple, and easily done for under $10.
Jesse

Jesse 67 c-10 · 08-27-2002, 09:23 PM

hey, we posted the same answer, almost, at the same time!

kenele · 08-27-2002, 09:34 PM

i am gonna install the ball valve...damn tired of sweating on 75 degree days.

**oldiron** · 08-27-2002, 09:53 PM

How is that new engine working out? If you are around this weekend maybe we could meet somewhere.

kenele · 08-27-2002, 11:14 PM

only thing I got going on this weekend is gonna try and contact Breeh and go pick up that free bench seat from him.

kenele · 08-27-2002, 11:17 PM

Oh yeah and the engine is doing good after i fixed the lower radiator hose that was only half on and leaking.....but I think the tranny might need a rebuilding here pretty soon...hehe.wait'll i tell the accountant

.........she's gonna love that news

**oldiron** · 08-27-2002, 11:17 PM

Sounds like fun. How is Monday looking?

kenele · 08-27-2002, 11:21 PM

let me know where and when and I am there

**oldiron** · 08-27-2002, 11:28 PM

How about where you took your picture. 10 am. Legion Park.

kenele · 08-27-2002, 11:36 PM

cool...can't wait to check out that headliner..

gonna try and build one. I'll look for you on the swings....LOL

**oldiron** · 08-27-2002, 11:36 PM

Check your Private Message for Phone #'s

kenele · 08-27-2002, 11:54 PM

Last friday evening we went down to Hwy 99 and about 170 th street in Lynnwood to the informal car show that they have weekly. There were a couple of NICE 67-72 chev's and a lot of other cars. we might go again this week.

ChevLoRay · 08-28-2002, 12:23 PM

The valve from NAPA is brass, but it has a weird screw thing to shut off/open it up. It is possible for it to leak. You have to screw it all the way in, or all the way out to help (I said HELP) prevent it from leaking. Ball Valves are positive closers...the ball seats against the seat and blocks the flow. Even tho I have the NAPA valve and it isn't leaking at this time, AND it was a lot cheaper than the vacuum-operated valve that went bad, I'm gonna consider a ball valve when this one goes bad.

kenele · 08-28-2002, 10:48 PM

I put the little valve from Napa and it worked like a charm although a little over priced @ $20 I know its gonna make a world of difference.

TERRYP · 08-30-2002, 05:57 AM

Most Japanese cars have a nice cable operated valve for the jeater that is mounted on the firewall. They are real nice for your purpose.

08-27-2002, 08:50 PM	#1
kenele Registered User Join Date: Jul 2002 Location: Vaugh, WA Posts: 191	valve on the heater core hose I have a problem with hot air constantly coming out of the vents in my truck . I heard mention of a valve that can be placed on the heater core hose that shuts off the flow of water to the heater core when not in use. Is this a stock item that someone has removed from my truck or is it an aftermerket idea? Does anyone know how they work , are they manually operated or vacuum operated? __________________ '71 GMC Suburban C1500

08-27-2002, 09:04 PM	#4
kenele Registered User Join Date: Jul 2002 Location: Vaugh, WA Posts: 191	Longhornmail.....do you know what the name of that valve is called.? is there a switch in the cab? __________________ '71 GMC Suburban C1500

08-27-2002, 09:16 PM	#5
Mountain Man Registered User Join Date: Jan 2002 Location: Calgary, Alberta, Canada Posts: 451	I have installed a shut off valve on my truck for the same reason, hot air in the cab. I have a non/ac cab, so I installed the valve on the lower heater hose, the one from the intake manifold. This is the one that flows into the heater core. The upper one is the return hose to the water pump. Just splice into the heater hose, and install a ball type shut off valve. The one I used was in the plumbing section at home depot. It is even gold and chrome colored, and looks good. It is actually brass inside. Approx $12. Works great. I have an engine pic on file that I can attach, but you can barely see the valve: __________________ 72 C10 Cheyenne Super Full trim Factory tach dash A/C dash Factory tilt 350 / 350 power train - with Edelbrock components.

08-27-2002, 09:20 PM	#6
Jesse 67 c-10 Registered User Join Date: Feb 2000 Location: Edmonton, Alberta, Canada Posts: 599	go to a hardware store and get yourself a 1/2" ball valve, 2 barbed fittings to fit your hose size that screw into the valve, and 2 hose clamps. cut your heater hose, shouldn't matter which one, plumb it in, start and warm up motor with valve open and check for leaks, shut it off when you dont want heat. simple, and easily done for under $10. Jesse __________________ Edmonton, Alberta, 67 c-10, Long fleet, front disks, 5 lug rear end, 327 with Vortechs, edlbrock manifold, comp cams XE 256, 600cfm carb. Backed by a getrag 5 speed and 1 piece driveshaft. 1993 Dihatsu Hijet Jumbo cab 4x4, currently converting to battery electric power.

08-27-2002, 09:23 PM	#7
Jesse 67 c-10 Registered User Join Date: Feb 2000 Location: Edmonton, Alberta, Canada Posts: 599	hey, we posted the same answer, almost, at the same time! __________________ Edmonton, Alberta, 67 c-10, Long fleet, front disks, 5 lug rear end, 327 with Vortechs, edlbrock manifold, comp cams XE 256, 600cfm carb. Backed by a getrag 5 speed and 1 piece driveshaft. 1993 Dihatsu Hijet Jumbo cab 4x4, currently converting to battery electric power.

08-27-2002, 08:58 PM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Think of it like installing a water spicket in your hose, it works the same way. 20 bucks at napa.

08-27-2002, 09:00 PM	#3
Alex Hayley Registered User Join Date: Jul 2000 Location: NC Posts: 987	Which hose is that valve installed on?

08-27-2002, 09:34 PM	#8
kenele Registered User Join Date: Jul 2002 Location: Vaugh, WA Posts: 191	Thx for the help i am gonna install the ball valve...damn tired of sweating on 75 degree days. __________________ '71 GMC Suburban C1500

08-27-2002, 09:53 PM	#9
oldiron Designated Grumpy Old Man Join Date: Oct 2001 Location: arlington, washington usa Posts: 3,091	How is that new engine working out? If you are around this weekend maybe we could meet somewhere. __________________ Never let the truth get in the way of a good story 71 Chev 1/2 ton 4X4 LWB Fleetside SOLD http://67-72chevytrucks.com/vboard/s...d.php?t=361222 http://www.youtube.com/watch?v=1LgREwtDfaA 68 Chev 1 ton flat bed http://www.youtube.com/watch?v=0bO8szzlD4A 56 Chev Handyman Wagon http://www.youtube.com/watch?v=9y-6ddpBTkM http://www.youtube.com/watch?v=lbLzZ7zY8wA 56 Chev Belair http://67-72chevytrucks.com/vboard/s...d.php?t=410667 http://www.youtube.com/watch?v=xoW0Ei7ZNIg

08-27-2002, 11:14 PM	#10
kenele Registered User Join Date: Jul 2002 Location: Vaugh, WA Posts: 191	this weekend only thing I got going on this weekend is gonna try and contact Breeh and go pick up that free bench seat from him. __________________ '71 GMC Suburban C1500

08-27-2002, 11:17 PM	#11
kenele Registered User Join Date: Jul 2002 Location: Vaugh, WA Posts: 191	p.s. Oh yeah and the engine is doing good after i fixed the lower radiator hose that was only half on and leaking.....but I think the tranny might need a rebuilding here pretty soon...hehe.wait'll i tell the accountant .........she's gonna love that news __________________ '71 GMC Suburban C1500

08-27-2002, 11:17 PM	#12
oldiron Designated Grumpy Old Man Join Date: Oct 2001 Location: arlington, washington usa Posts: 3,091	Sounds like fun. How is Monday looking? __________________ Never let the truth get in the way of a good story 71 Chev 1/2 ton 4X4 LWB Fleetside SOLD http://67-72chevytrucks.com/vboard/s...d.php?t=361222 http://www.youtube.com/watch?v=1LgREwtDfaA 68 Chev 1 ton flat bed http://www.youtube.com/watch?v=0bO8szzlD4A 56 Chev Handyman Wagon http://www.youtube.com/watch?v=9y-6ddpBTkM http://www.youtube.com/watch?v=lbLzZ7zY8wA 56 Chev Belair http://67-72chevytrucks.com/vboard/s...d.php?t=410667 http://www.youtube.com/watch?v=xoW0Ei7ZNIg

08-27-2002, 11:21 PM	#13
kenele Registered User Join Date: Jul 2002 Location: Vaugh, WA Posts: 191	Monday sounds good let me know where and when and I am there __________________ '71 GMC Suburban C1500

08-27-2002, 11:28 PM	#14
oldiron Designated Grumpy Old Man Join Date: Oct 2001 Location: arlington, washington usa Posts: 3,091	How about where you took your picture. 10 am. Legion Park. __________________ Never let the truth get in the way of a good story 71 Chev 1/2 ton 4X4 LWB Fleetside SOLD http://67-72chevytrucks.com/vboard/s...d.php?t=361222 http://www.youtube.com/watch?v=1LgREwtDfaA 68 Chev 1 ton flat bed http://www.youtube.com/watch?v=0bO8szzlD4A 56 Chev Handyman Wagon http://www.youtube.com/watch?v=9y-6ddpBTkM http://www.youtube.com/watch?v=lbLzZ7zY8wA 56 Chev Belair http://67-72chevytrucks.com/vboard/s...d.php?t=410667 http://www.youtube.com/watch?v=xoW0Ei7ZNIg

08-27-2002, 11:36 PM	#15
kenele Registered User Join Date: Jul 2002 Location: Vaugh, WA Posts: 191	10 A.M. it is cool...can't wait to check out that headliner.. gonna try and build one. I'll look for you on the swings....LOL __________________ '71 GMC Suburban C1500



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08-27-2002, 11:54 PM	#17
kenele Registered User Join Date: Jul 2002 Location: Vaugh, WA Posts: 191	if your interested Last friday evening we went down to Hwy 99 and about 170 th street in Lynnwood to the informal car show that they have weekly. There were a couple of NICE 67-72 chev's and a lot of other cars. we might go again this week. __________________ '71 GMC Suburban C1500

08-28-2002, 12:23 PM	#18
ChevLoRay Old Skool Club Join Date: Jun 2001 Location: Benton, AR "The Heart of Arkansas" Posts: 10,880	The valve from NAPA is brass, but it has a weird screw thing to shut off/open it up. It is possible for it to leak. You have to screw it all the way in, or all the way out to help (I said HELP) prevent it from leaking. Ball Valves are positive closers...the ball seats against the seat and blocks the flow. Even tho I have the NAPA valve and it isn't leaking at this time, AND it was a lot cheaper than the vacuum-operated valve that went bad, I'm gonna consider a ball valve when this one goes bad. __________________ Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was.

08-28-2002, 10:48 PM	#19
kenele Registered User Join Date: Jul 2002 Location: Vaugh, WA Posts: 191	screw top valve from napa I put the little valve from Napa and it worked like a charm although a little over priced @ $20 I know its gonna make a world of difference. __________________ '71 GMC Suburban C1500

08-30-2002, 05:57 AM	#20
TERRYP GYRO GEARLOOSE Join Date: Jun 2000 Location: Nevada City, CAEverett, WA Posts: 361	Most Japanese cars have a nice cable operated valve for the jeater that is mounted on the firewall. They are real nice for your purpose. __________________ Nevada City, CA Everett, Washington 57 3/4 rat, 235, 3spd 66 C-10 Panel, SWB. 350 from '68, 200R4 tranny, 3.07 rear ratio, restoring 68 C10 LWB 350 4spd, 4.56 rear dump runner 82 Camaro, 305, THM-200-R4 84 Monte Carlo 305 TH350, land tuna 85 Tercel SW, snow runner DISGRACED OUTLAW MEMBER OF THE DRUM BRAKE CLUB

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