Valve in heater core line?
Thread Starter
Race Director
Joined: Apr 2005
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From: Fremont CA
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19-'20
NCM Sinkhole Donor
Valve in heater core line?
OK, so I'm driving my 97 Vette and suddenly I get a "Low Coolant" warning and the temp starts to skyrocket. As I pull over I start to see steam coming from under the hood. When I open up the hood, there is coolant all over the passenger side of the engine compartment. After poking around, I notice that down on the front of the motor is a metal block with 3 hoses. One is a large radiator hose, and two are small coolant hoses that appear to link to metal "hoses" near the firewall. One of the small hoses has a valve of some sort spliced in the middle. The valve is snapped and spewing coolant. I looked at the valve and it has an arrow indicating direction. However, when I remove it and look through it, it seems to be fairly hollow and will allow coolant to flow in either direction. I went to Kragen and bought a simply hose2hose connector and everything seems to be fine.
WHAT IS THAT VALVE? And is it supposed to restrict flow direction? Should I buy the correct one from GM?
HELP!!
WHAT IS THAT VALVE? And is it supposed to restrict flow direction? Should I buy the correct one from GM?
HELP!!
Thread Starter
Race Director
Joined: Apr 2005
Posts: 11,138
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From: Fremont CA
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19-'20
NCM Sinkhole Donor
Oh yeah, there are 3 lines of numbers on it. two are obscured, so I don't know what they say. However, the one remaining shows 10157988. When I look up the part on a GM parts sight, it says...
Hvac - Heater - Control valve Control valve, corvette 1992 - 1996
92 to 96?!?!?
Hvac - Heater - Control valve Control valve, corvette 1992 - 1996
92 to 96?!?!?
Tech Contributor
Joined: Dec 1999
Posts: 32,910
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Im with you,,,,I dont think that there is a valve in any C5 heater line! Unless someone added it, I cant see any on mine. Heres my e-mail address;
bill327@msn.com
Send it to me and I will post it for you.
BC
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Thread Starter
Race Director
Joined: Apr 2005
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From: Fremont CA
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19-'20
NCM Sinkhole Donor
OK, the red arrow shows where the part USED to be. Now, there is just a hose joiner in there. The second pic is the broken part I took out.
Thread Starter
Race Director
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From: Fremont CA
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19-'20
NCM Sinkhole Donor
Thread Starter
Race Director
Joined: Apr 2005
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From: Fremont CA
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19-'20
NCM Sinkhole Donor
Here is an end view showing that there is no flow restrictor inside. Maybe there WAS at one time?
Tech Contributor
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
My engine is disassembled down to the block so I have a nice CLEAR view of the entire cooling an heating system. There aint none of those valves any where on my 02 ZO6.
Burning Brakes
Joined: Sep 2005
Posts: 987
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From: Braidwood Il.
That is a restrictor that is put in the hose going into the heater core to slow the coolant flow going into the core, if that was'nt in the hose the coolant would make a noise inside the car. With that restrictor in there you won't hear any flow going through the heater core.
Thread Starter
Race Director
Joined: Apr 2005
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From: Fremont CA
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19-'20
NCM Sinkhole Donor
Thread Starter
Race Director
Joined: Apr 2005
Posts: 11,138
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From: Fremont CA
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19-'20
NCM Sinkhole Donor
That is a restrictor that is put in the hose going into the heater core to slow the coolant flow going into the core, if that was'nt in the hose the coolant would make a noise inside the car. With that restrictor in there you won't hear any flow going through the heater core.
I also don't remember seeing one on my 98 Coupe. 
Melting Slicks
Joined: Mar 2001
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From: Worden Illinois
