How do you replace the heater core in a 1997 Mitsubishi Eclipse?

Answer 1

You don't. It's a major process, you have to remove the entire dash including the steering wheel, center counsel, air bags. everything. To remove the heater hoses from the fire wall are a headache. And to find a Heater Core is a another chore.

I replaced the heater core in my 96 Eclipse. I took me 2 month's to find a heater core, the local parts stores could not get one in a timley matter. I had to order it from a dealer in New Jersey. I live in New Mexico. You sell the car and take a loss if you need to. The whole process takes about 2 full days.