What are the characteristics of a bad heater core in a hyundai tiburon gt?

Heater core could be clogged-up or leaking-Are you overheating? and how long has this been happening-coolant gettting low-could be leaking somewhere externally or being burned in the combustion chamber-Pressure test the cooling system

car temp=engine temp?
The heater core is a heat exchanger just like the radiator. It removes heat from the coolant flowing through it and gives it to the air passing over it. So, a drop in engine coolant temperature is normal.
Does antifreeze build up in the overflow bottle when the heater is off? Do the floorboards of the vehicle get wet? Can you smell coolant?

The car has never overheated. Coolant smell every once in a while. No collant is in the oil. If there was it would turn an unusual chocolaty color correct, and be thick?

Also the floor mats never get wet or have any dampness to them

Yes. Normally that is the case.

How's that toe feel ras? lol

Have the cooling system pressure tested-

As my esteemed colleague stated, we recommend having the cooling system pressure tested. It's a fairly closed system, so the levels shouldn't fluctuate much, if at all.

any other suggestions?

cool thank you.

lol-didn't know you were behind me-no worry get used to it, it ain't a thing. The problem with the cooling system it likes to overheat. The problem here it needs a 2nd radiator to cool it down-

Let us know what the pressure test results are alpinemix6.

ras, another time the question wasn't locked. I clicked 'Answer' and didn't get any message that you were working the question already.

Well 2 is better than one -lol dunno anymore. I thinkl I'll just go with the flow

me too.

All fixed up alpinemx6?