its the PCV valve
Coolant lines? Shift linkage? could also be the rear or front seals leaking
There could be many reasons why a 2001 Chevrolet Prizm will not start. A few reasons could be a bad starter, bad plugs, no gas, or a bad sensor.
could be freeze plug, or intake leaking
Perhaps slave cylinder, line or fitting leaking?
It could be the coolant overflow tank that is leaking.
Dealer? Auto Zone? Salvage yard? E-Bay?
Heater core could be leaking
CFI ? The fuel pressure regulator could be leaking.
Could be several reasons, need to know aprox where it is leaking from.
Could be "Dex-Cool" engine coolant.
If it's leaking transmission fluid, could be a bad pump seal. If it's leaking engine oil, could be a bad oil filter, leaking valve cover gasket, leaking intake manifold gasket, leaking oil pressure sender, leaking distributor gasket.
No, a clogged heater core will not make it overheat. A leaking heater core will.