How do you change a heater core in a 1963 Chevy II Nova?
it's in the heater box under the glove box.simply disconnect the hoses under the hood,and take the heater box out from under the dash get a new core and install
when i removed the heater for my nova i had to disconnect the cables and wires from the heater assy and on the engine side of the firewall remove the nuts holding the assy to the firewall that allowed the whole assy to come out from under the dash then i dissassembled the assy and the heater core was bolted into the assy on the ends hope this helps
How do you replace the heater core on a 1978 Chevy Nova with 305 V8 engine and where is it located on the car?
The heated coolant from the engine comes out of the fitting nearest the thermostat, then enters the lower heater hose nipple (or the smaller of the two nipples) then the coolant comes out of the heater and returns into the fitting on the water pump. All fittings and hoses attached to the water pump are return lines.
Here's a link for a good step-by-step article in Super Chevy magazine. The car used in this was a 1968 Malibu, but the process is very similar for your Nova. I'm facing this same project on my '77 Nova but haven't got any pictures just yet. http://www.superchevy.com/tech/sucp_0707_remove_and_replace_leaking_heater_core/index.html One thing they failed to mention in their ad... make sure you have a 5-gallon bucket to catch the anti-freeze!