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?

  • jazpunksuxBEnglish
    1·
    10 months ago

    To address your original question, the heater core, and also the ac evaporator, is inside a box in the cabin which the blower motor is also attached to. You get heat—or cooling—by having the blower move air across the hot heater core or the cold evaporator. Mounting a core elsewhere would do nothing because it would no longer be integrated into the hvac box or connected to the ducts and vents