skyman51
Well-Known Member
Other than correctness, does it really matter which way the coolant flows through the heater core? In other words the hoses are incorrectly installed as far as the input and output.
I agree with this, helps with removing air.In a heating coil it is general practice to pipe the heater with flow in the bottom of the coil and out the top of the coil. Not hard to change hoses.
Yes the hoses are the same size on a 67. GM always made them two sizes. I don't know why they are the same on the 67 GTX. TIt's your call. Not hard to switch if you wanted to. Won't hurt anything if you don't. Just curious though, my 70 has different size hoses and connections. Are the hoses on a 67 the same size?
No shut off valve and no A/C. I am going to leave it alone.Water flow direction doesn't matter so much with a car that doesn't have ac, but it does matter if it does because the shut off valve needs to stop the hot water so the ac coil will remain cold as the air goes past it. The valve will not completely shut off all the water, as the ac coil could freeze up, so a bit of water flow still goes through for that reason.
A radiator guy and a master mechanic said it really won't make any difference which way the water flows through the core. It has nothing to do with the engine cooling.
His mechanic is correct. The heater core will work the same regardless of direction of flow. When he says it has nothing to do with engine cooling I'm sure he's talking about design. You can still run your heater to aid in cooling the engine, it will work the same. Also he stated earlier that his hose connections are the same size.I beg to differ.
The first thing you do when driving and the engine temperature increases too much is to turn your heater to FULL Hot. That brings the temperature down enough to get to a place of inspection or repair.
As far as the correct way around for the hoses, I don't know about Hemi cars, but all others have two different sizes nipples from what I've seen. So putting them the wrong way around means that someone has used too small a hose on one nipple, and too big a hose on the other. One will likely fall off, and the other could possibly split open.
Might be a good time to get a new Master Mechanic.
I hit disagree when I disagree.dla4567, not sure why you are disagreeing with everyone, by chance did you hit the wrong button?