Heater hoses routing

Al Olmo · 06-17-2005

In my '70 GT the hose from the top of the heater box goes to the lower radiator hose, the bottom one goes to the thermostat but what I'm not sure about is that half way down the top hose is spliced and connected to the bottom one with a 1/2" hose. Is this correct?
Thanks

greensmurf20 · 06-17-2005

the two hoses really shoudlnt be spliced into each other. 1 hose should go from the top of the waterpump to 1 of the tubes on the heater core, and the other heater hose should go from the thermostat housing to the other tube on the heater core. 1 of those two heater hoses should have a valve in them operated by a cable, to open and close the valve, which is your temperature control switch in the car. the only time the hoses are are run in some sort of way to "bypass" the heatercore, is usually because the heatercore leaks. i'll try to get a pic of mine real quick to show you.

oldopelguy · 06-17-2005

Does your car have an aftermarket carb on it? I'll bet it does, and those are the hoses that used to hook to the Solex for the choke. You should probably replace the hoses and just leave the "T's" and connecting hose out, but until you do the set-up you have is fine.

bq97 · 06-17-2005

Here is how mine is run.

Out of the heater core the top hose goes to the water pump next to the lower radiator hose. The bottom hose goes to the heater valve and then to the thermostat housing.

hth
Brian

greensmurf20 · 06-17-2005

stephens right about the solex waterchoke lines, i have forgotten about those, and done the same thing you've described above before until new heater hoses could be bought. my camera dont have enough light in the garage but, top hose has the valve in it, goes fromt op of core to thermostat housing, and bottom goes from waterpump to bottom of the heater core, it really doesnt matter tho, they can be hooked up both ways and work the same, it just reverses flow through the heater core is all, in fact my mantas hooked up opposite of my GT.

kwilford · 06-17-2005

Moved to the "Group 9 - Accessories - Radio, Heater, A/C, Sound Systems" Forum.

Al Olmo · 06-18-2005

Yep you were right the car had a very funky looking carburetor that I got rid of. So what I'm going to do is I'm going to cancel the heater for now until I do the interior at which time I'll replace the heater unit with a cleaner one that I have. I will save all the good information that you guys gave me, I can't tell you how grateful I'm.
Thank you.

06-17-2005	#1 (permalink)
Al Olmo Member Join Date: May 2005 Location: Sacramento, CA Posts: 153 Classified Rating: 0% (0)	Unanswered: Heater hoses routing In my '70 GT the hose from the top of the heater box goes to the lower radiator hose, the bottom one goes to the thermostat but what I'm not sure about is that half way down the top hose is spliced and connected to the bottom one with a 1/2" hose. Is this correct? Thanks

06-17-2005	#3 (permalink)
oldopelguy Have Opel, Will Travel Join Date: Mar 2002 Location: Pickens, SC Posts: 1,610 Classified Rating: 0% (0) Logbook Entries: 3 Provided Answers: 1	carb Does your car have an aftermarket carb on it? I'll bet it does, and those are the hoses that used to hook to the Solex for the choke. You should probably replace the hoses and just leave the "T's" and connecting hose out, but until you do the set-up you have is fine.

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06-17-2005	#2 (permalink)
greensmurf20 OPEL-LESS!!! Join Date: Mar 2003 Location: Gobles michigan 49055 Posts: 2,110 Classified Rating: 0% (0)	the two hoses really shoudlnt be spliced into each other. 1 hose should go from the top of the waterpump to 1 of the tubes on the heater core, and the other heater hose should go from the thermostat housing to the other tube on the heater core. 1 of those two heater hoses should have a valve in them operated by a cable, to open and close the valve, which is your temperature control switch in the car. the only time the hoses are are run in some sort of way to "bypass" the heatercore, is usually because the heatercore leaks. i'll try to get a pic of mine real quick to show you.

06-17-2005	#5 (permalink)
greensmurf20 OPEL-LESS!!! Join Date: Mar 2003 Location: Gobles michigan 49055 Posts: 2,110 Classified Rating: 0% (0)	stephens right about the solex waterchoke lines, i have forgotten about those, and done the same thing you've described above before until new heater hoses could be bought. my camera dont have enough light in the garage but, top hose has the valve in it, goes fromt op of core to thermostat housing, and bottom goes from waterpump to bottom of the heater core, it really doesnt matter tho, they can be hooked up both ways and work the same, it just reverses flow through the heater core is all, in fact my mantas hooked up opposite of my GT.

06-17-2005	#6 (permalink)
kwilford Über OpelGT.com Moderator Join Date: Mar 2002 Location: Calgary, Alberta, Canada Posts: 3,773 Classified Rating: 0% (0) Provided Answers: 1	Moved to the "Group 9 - Accessories - Radio, Heater, A/C, Sound Systems" Forum.

06-18-2005	#7 (permalink)
Al Olmo Member Join Date: May 2005 Location: Sacramento, CA Posts: 153 Classified Rating: 0% (0)	Yep you were right the car had a very funky looking carburetor that I got rid of. So what I'm going to do is I'm going to cancel the heater for now until I do the interior at which time I'll replace the heater unit with a cleaner one that I have. I will save all the good information that you guys gave me, I can't tell you how grateful I'm. Thank you.

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