I 100% know this isn’t the correct way.
What is the reason the heater core is behind the firewall? To keep it out of the cold?
I have a vehicle that I don’t want to dump money into. It isn’t getting hot air from the drivers side. It blows hard but it isn’t hot. I was told it was the heater core from a shop. I tried to flush the heater core twice. It didn’t seem clogged as water flowed freely (just an observation).
Can I just buy a heater core and mount it inside the engine bay instead of tearing the dash apart?