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Can I run heater hoses differnet than stock

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Old Jan 11, 2007 | 07:54 AM
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Can I run heater hoses differnet than stock

I was wondering can I run my heater hoses different than they are stock? I have an 89 GTA 5.7 which is currently out of the car. Can I make things simple. Can I take the bypass value off? Any body made this like an old car? Just 2 hoses in and out? Thanks
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Old Jan 11, 2007 | 08:30 AM
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From: Winston salem, NC
Car: 1987 1SICIROC.....1999 TransAm
Engine: 385 HSR.....LS1
Transmission: 700R4 with Midwest 3400 2.4str...M6
Axle/Gears: SLP Zexel Posi unit 3.42's...3.73's
yeah it can be done...the MODERATOR...AKA.."Abubaca" did it on his IROC...looks sweet...I want to copy that...
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Old Jan 11, 2007 | 07:03 PM
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Originally Posted by Wishmaster's87IROC
yeah it can be done...the MODERATOR...AKA.."Abubaca" did it on his IROC...looks sweet...I want to copy that...

Thats good , how did he do it???
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Old Jan 11, 2007 | 10:19 PM
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From: Orland Park, IL
Car: 1984 Z28
Engine: SLOW carbed ls
Transmission: TH400 with brake, 8" PTC converter
Axle/Gears: moser 9" 4.11
in from water pump to heater core

out to radiator....

really simple
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Old Jan 11, 2007 | 10:35 PM
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From: Macedonia ,OH
Car: Formula
Engine: 6.0 LSX
Transmission: 4L60E
Axle/Gears: 9 Bolt 3:27
Or just dont run them at all.
Attached Thumbnails Can I run heater hoses differnet than stock-dsc01096-1.jpg  
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Old Jan 14, 2007 | 10:14 AM
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Jaxom's Avatar
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From: 'Bama
Car: '89 IROC-Z
Engine: StealthRam 355
Transmission: 6-speed
Axle/Gears: 3.70 9-bolt
Is there a "heat blend door" inside the dash that lets you do this and still retain temperature control for the HVAC system? I thought the heater control valve was what changed it from cold to hot when you move the slider.
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Old Jan 17, 2007 | 11:04 AM
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From: Munford, TN
Car: 89 z
Engine: Chevy 383
Transmission: 700R4
Axle/Gears: 9 bolt 3.73
I removed that ugly as s diverter valve and threw it up in the air 3 times before I could kill it with a 12 guage remington. And since I deleted my A/C and still wanted heat I just ran a heater hose from my water pump (or front of intake in stock form) into the heater core and a different hose out the heater to the radiator.
I also installed a little manual cut-off valve in the hose from pump to heater core that I turn off during the summer to keep hot water out of the passenger compartment. Most people recomend you drill a couple 1/8" holes in the thermostat to keep coolant flowing when you close this valve. I don't think it would really make a difference for this but it is a good idea for other reasons.

Last edited by Norwood; Jan 17, 2007 at 11:05 AM. Reason: fat fingers
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Old Jan 17, 2007 | 11:26 AM
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Does it shorten the life of the heater core if you remove the heater control valve and have coolant constantly flowing through it?
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Old Jan 17, 2007 | 05:31 PM
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From: Munford, TN
Car: 89 z
Engine: Chevy 383
Transmission: 700R4
Axle/Gears: 9 bolt 3.73
I wouldn't think it would shorten it, maybe extend the life. If not circulating there is still coolant in there that might get stagnant and have sediment that might settle. Just my opinion.
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Old Jan 19, 2007 | 09:39 PM
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From: Macedonia ,OH
Car: Formula
Engine: 6.0 LSX
Transmission: 4L60E
Axle/Gears: 9 Bolt 3:27
Non AC Thirdgens had no valve. Constant Flow.
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Old Jan 19, 2007 | 09:58 PM
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From: 62656
Car: 1991 S10 pickup 2700lbs
Engine: 4.3L Z TBI
Transmission: 700R4
Axle/Gears: 3.08 7.625"
you dont need the valve,

removing it from my vehicles is one of the first things i do to them when i first get them

good luck
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Old Jan 22, 2007 | 08:54 AM
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From: Benzie, MI
Car: 91 rs
Engine: Blow through 383, 10 psi, xr288hr
Transmission: Manual th350 ATI 3000
Axle/Gears: 3.50 9"
What if you bought a new radiator that doesnt have a provision for heater return?
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Old Jan 22, 2007 | 09:15 AM
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From: Charleston, SC
Car: 91 Camaro Vert
Engine: 02 LS1, HX40
Transmission: 2002 LS1 M6
Originally Posted by Batass
What if you bought a new radiator that doesnt have a provision for heater return?
then you return it like every other GM car does.... hoses go in the water pump and the intake manifold... no extra radiatior nipple required.
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