Top hose of the heater core goes to the thermostat housing. The lower hose goes the the fitting behind the A/C compressor.
Replacing the heater hose bypass fitting will depend on how the fitting was installed. It could be screwed or bolted in. Try searching for your specific vehicle for a detailed description of the install.
one large hose from bottom of radiator to side of water pump. other large hose from thermostat housing to top of radiator. one heater hose from water pump to heater core, I think this one has a Y in it if there is a rear heater other heater hose from heater core to somewhere on top the engine. If there is a rear heater, its return hose goes to a fitting on the radiator.
I would simply call my mechanic.
The Chevy heater hose removal tool is a plastic piece that clamps around the hose. The tool slides into the fitting to release the hose.
there is a hose that goes to the block and one that goes elsewhere, there is a small stem and a larger one that is coming out of the heater core which one goes where
Heater core? Inlet or outlet hose fitting at heater core?
loosen the clamp holding the hose on to a fitting and pull the hose free.
The heater inlet hose on a Hyundai Accent is in the back of the engine compartment. It goes through the firewall to the heater core.
Thermostat housing It is probably the quick connect fitting. The hose goes from there to the heater core. I had to replace mine last year.
Generally, the upper heater hose leads to the water pump.
Drain plug on the radiator? Bottom/bottom backside one side or the other, may be a wing nut, hex nut, some cars even have an Allen wrench fitting. You can get a T fitting that goes into one of the heater hoses. Just cut the hose and install then open the radiaator cap and connect a hose to the T fitting.