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Old 09-19-2010, 10:58 AM   #1
adventureoflink
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1997 SL2
Default Heater Control Valve, wherefore art thou?

So yes, as the title says, where is the heater control valve in a Saturn S-series, made around 1997?

How easy is it to replace, and is it accessible? Just curious.

...
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DOB: 3/19/97
Date Obtained: 5/30/07
Status: Alive, 1/2 exhaust

2004 Merc G.Marquis GS
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Date Obtained: 7/6/12
Status: Alive, no heat

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Old 09-19-2010, 11:15 AM   #2
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1996 SW2
Default Re: Heater Control Valve, wherefore art thou?

Like most cars built since the macarena, there isn't one.

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Old 09-19-2010, 11:17 AM   #3
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Default Re: Heater Control Valve, wherefore art thou?

Quote:
Originally Posted by madpogue View Post
Like most cars built since the macarena, there isn't one.
And this Saturn is part of that era... wonder what made the HCV get axed...

thanks for the info, sir.

...
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DOB: 3/19/97
Date Obtained: 5/30/07
Status: Alive, 1/2 exhaust

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Old 09-19-2010, 12:08 PM   #4
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Default Re: Heater Control Valve, wherefore art thou?

Heater control valve? If you mean the thermostat, it may be interpreted as the closest thing to describing heat control - for the engine. If you truly mean a valve to manually shut off coolant flow to the heater core, it doesn't exist. The HVAC box has two blend doors; one that directs air flow to the various vents and the other to modulate air temperatures for temperature control. One door selects how air flows to control the amount of heat wanted into the cabin from plain unheated air to fully heated air directed onto the heater core. The coolant is always flowing and no shut off valve exists.

Madpogue, ever had to replace a heater shut off valve? In the passenger side? Not fun when it leaks.................its one less troublesome part to deal with.
Attached Images
File Type: jpg 98 HVAC.jpg (91.9 KB, 33 views)
File Type: jpg vented.jpg (92.3 KB, 24 views)
File Type: jpg bi-level.jpg (99.8 KB, 19 views)
File Type: jpg defrost.jpg (102.2 KB, 14 views)
File Type: jpg heated.jpg (101.7 KB, 20 views)

...
*The CPS is the heart of the entire EFI system. No cps = dead EFI system*
*There's more to a/c than just a few cans of refrigerant*
*There's more to brakes than just replacing parts*

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Old 09-19-2010, 12:15 PM   #5
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Default Re: Heater Control Valve, wherefore art thou?

Quote:
Originally Posted by adventureoflink View Post
And this Saturn is part of that era... wonder what made the HCV get axed...

thanks for the info, sir.

Because eventually, they leak and you get to replace it with a 1/2" gate valve under the hood or in the glove box. That is because when they die there is no longer a replacement that will work.

There is a bunch of linkage on the drivers side of the heater box, make sure it is all working correctly. Don't oil it either.

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Old 09-19-2010, 01:18 PM   #6
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Default Re: Heater Control Valve, wherefore art thou?

Don't listen to these guys. The heater control valve is located between the distributor cap and carburetor.

...
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Old 09-19-2010, 02:10 PM   #7
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Default Re: Heater Control Valve, wherefore art thou?

I'm still having trouble looking for my distributor cap and carb for my L300. I'm wondering if I can upgrade and forget about supercharging or tutbocharging, head right to flux capacitors. Of course I'll need some help acquiring some plutonium for version 1.0 as I don't think I can afford the improved versions........
Attached Images
File Type: jpg distributor cap.jpg (43.7 KB, 8 views)
File Type: jpg carburetor.jpg (53.0 KB, 11 views)
File Type: jpg FluxCapacitor.jpg (44.9 KB, 16 views)

...
*The CPS is the heart of the entire EFI system. No cps = dead EFI system*
*There's more to a/c than just a few cans of refrigerant*
*There's more to brakes than just replacing parts*

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Old 09-19-2010, 02:49 PM   #8
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Default Re: Heater Control Valve, wherefore art thou?

Quote:
Originally Posted by fdryer View Post
Of course I'll need some help acquiring some plutonium for version 1.0 as I don't think I can afford the improved versions........
Forget the plutonium.


...
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-1991 Turbo SL2 - Gone, but not forgotten.
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Old 09-19-2010, 02:58 PM   #9
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Default Re: Heater Control Valve, wherefore art thou?

I can't afford that upgrade. I heard that the Russians have some back room dealers for plutonium. I'ma gonna try this way thru the CVT belt seller over there........ And mine'll glow in the dark. Don't need no stinkin' HID's!?

...
*The CPS is the heart of the entire EFI system. No cps = dead EFI system*
*There's more to a/c than just a few cans of refrigerant*
*There's more to brakes than just replacing parts*

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Old 09-19-2010, 03:09 PM   #10
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Default Re: Heater Control Valve, wherefore art thou?

Quote:
Originally Posted by fdryer View Post
I can't afford that upgrade. I heard that the Russians have some back room dealers for plutonium. I'ma gonna try this way thru the CVT belt seller over there........ And mine'll glow in the dark. Don't need no stinkin' HID's!?
Just don't deal with Libyans. They'll come after you in a VW van with RPG launcher.

I'm going on vacation soon and traveling through time. I'll be returning last week and I'll bring back a Mr Fusion. They cost less than a Saturn S-Series in the future.

...
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Old 09-19-2010, 03:29 PM   #11
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Default Re: Heater Control Valve, wherefore art thou?

[voice="Majel Barrett"]Warning - thread hijacked.[/voice]

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Old 09-19-2010, 08:07 PM   #12
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1997 SL2
Default Re: Heater Control Valve, wherefore art thou?

But.. I've got a BUNCH of old pinball parts to spare!

http://www.youtube.com/watch?v=MBucwjIcc3s
2:30 in

...
1997 - SL2, barebones, 161k, Auto - Rebuild complete and.. burnt a valve 20k later Arrgh!
Purchased 114k 10/07
Added OEM CC

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Old 09-19-2010, 08:40 PM   #13
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Default Re: Heater Control Valve, wherefore art thou?

Quote:
Originally Posted by adventureoflink View Post
So yes, as the title says, where is the heater control valve in a Saturn S-series, made around 1997?

How easy is it to replace, and is it accessible? Just curious.
there is none in a saturn i believe. the heater core gets a flow of coolant all the time...

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Old 09-19-2010, 08:45 PM   #14
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Default Re: Heater Control Valve, wherefore art thou?

Quote:
Originally Posted by OldNuc View Post
Because eventually, they leak and you get to replace it with a 1/2" gate valve under the hood or in the glove box. That is because when they die there is no longer a replacement that will work.

There is a bunch of linkage on the drivers side of the heater box, make sure it is all working correctly. Don't oil it either.
tell me about it! i replaced more of these dam things than i can remember & they were not cheap! they tend to leak through the rubber vacuum diaphragm...

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Old 09-19-2010, 10:10 PM   #15
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Default Re: Heater Control Valve, wherefore art thou?

I remember opening the glove box on a 52 Chevy to open the valve so there would be a bit of heat.

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Old 09-19-2010, 11:07 PM   #16
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Default Re: Heater Control Valve, wherefore art thou?

OK OK, fair enough guys...

but still, thanks for the info all the same.

...
97 SL2
DOB: 3/19/97
Date Obtained: 5/30/07
Status: Alive, 1/2 exhaust

2004 Merc G.Marquis GS
DOB: 2/4/04
Date Obtained: 7/6/12
Status: Alive, no heat

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Old 09-20-2010, 08:23 AM   #17
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Default Re: Heater Control Valve, wherefore art thou?

Quote:
The heater control valve is located between the distributor cap and carburetor.
Isn't it just above the magneto where the spark advance control rod attaches.

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