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Which hose goes where? Does it matter where the

Which hose goes where? Does it matter where the two hoses go on the heater core. It's for a 68 cadillac coupe deville with a/c.

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Not if they are both the same size heater core will flow in both directions

Posted on Feb 02, 2010

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I swap out the heater core and may hav installed the hoses wrong.I hooked up the hose from water pump to lower fitting and return hose on top fitting


It usually doesn't matter-it just circulates coolant through the core and returns it. But the hose going to the water pump is the return hose from the core. The other hose from the cylinder head or intake manifold is where the coolant comes from and going to the heater core. Take off the hose at the water pump and you will see a stream coming out with the engine running and the heater control on hot. Try this and if the stream is not good, try swapping the hoses at the core- I mean take the hose to water pump and fit it to the core's upper hose, and the inlet hose to the lower fitting. It shouldn't matter, but let us know.

Nov 18, 2015 | Cars & Trucks

1 Answer

My heater hoses broke i can fix them but dont know which one goes were


What vehicle? Unless it has a check valve on it, it doesn't matter. If it bothers you, trace the route of the hoses and put the new ones on the side of the core to whatever direction the hose runs.

Jan 29, 2014 | 1997 GMC Suburban

1 Answer

Heater hose diagram


It don't matter where you put your heater hoses, coolent just goes in one and out the other, it don't matter whatsoever. Your problem is that your heater hoses are clogged up. Check where your hoses connected to your engine for blockages. If alot of corrosion is present, you stand a very good chance that your heater core may be clogged up as well. Wouldn't be a bad idea to clean out your coolent system with a good quality flush. Just to show you what i have found, check thes pictures, check red areas for blockages, and "c" is the inlet, "d" is outlet.(don't see why it matters tho)

a2be126a-bb26-4a15-9ae1-ff903d3b1541.jpg

make sure to check other end of hoses for blockages. inlet side goes to closest connection to waterpump.

Dec 11, 2013 | 2004 Kia Sorento

1 Answer

Heater core on


No, it don't matter.

Dec 09, 2013 | 2000 Daewoo Nubira

2 Answers

I forgot to pay attention to the heater hose connections on the heater core to see which hose goes on which connection. Any help for my senior moment?


Hi, my name is Shaun. I will do my best to help you with your problem. The good news is, for all intensive purposes, it really doesn't matter where the hoses go, as long as you are referring to the connections directly to the heater core. You should have two aluminum pipes coming out of your heater core where the rubber hoses attach. As long as the hose fits snugly, attach it. All the heater core is is a small radiator that cycles hot water from the block. You blow air across it and you have heat. There are no check valves or anything to worry about. One thing you do want to keep in mind when reattaching the hoses, though, is to reattach them in a way that allows them to conform to their most natural state. In other words, don't try to criss-cross them, stretch them, or twist them. This could result in leaks later on. Hope this helps. Have a great day!

Jun 16, 2011 | Oldsmobile Bravada Cars & Trucks

1 Answer

I have no heat on my 93 silverado. i have replaced the heater core,thermostat,and radiator. I checked the blend door while I had the heater core out and it works fine.With the heater hose that goes to the...


LOOKING AT HEATER CORE TOP HOSE COOLANT FLOW IN BACK OUT THROUGH THE BOTTOM HEATER CORE HOSE CHECK WATER PUMP BYPASS HOSE SEE IF IT GETS HOT.IF NOT COULD BE BLOCKAGE AT BYPASS HOSE FROM WATER PUMP OR WATER COULD BE FAULTY GETTING TOO WEAK PUMP COOLANT THROUGH SYSTEM.IF COOLANT GETTING HOT GOING TO HEATER CORE THE HEATER CORE AND COOLANT SYSTEM NEED FLUSHING OUT.

Dec 05, 2010 | 1993 Chevrolet Suburban

4 Answers

1998 Ford Taurus, heater won't blow hot air through any vent including defrost, coolant level is okay, no heat no matter how long car is run, car doesn't overheat, can't get warm air even if run at air...


common problem is the water resivor cracks up at the bottom... it appears that your water level is fine because the car doesnt over heat but i am willing to bet that resivor doesnt have water to the top. The radiator will hold just enough water to keep it cool. I replaced mine 3 times the sulution is doing to sound weird but go to the junk yard and get one off a murcury sable. dont know why but the sables res doesnt crack like that

Nov 08, 2010 | 1998 Ford Taurus

1 Answer

I've installed a heater core and the issue is that before the core was bypassed and Im not sure what hoses connect were. Any helpful advice would be appreciated.........


Usually it doesn't matter, if there is a control valve to control the flow of water around or on the heater coil generally the hose coming from the intake which is a supply hose goes to the valve end of the heater coil

Mar 01, 2010 | 1997 GMC Sierra

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