Following up on the post a few down, I'm also having heat problems on my '95 Z28. It stopped out of the blue about 2 years ago (I don't drive it in the winter anymore, that's why I haven't done anything yet). I've tried the thermostat, complete system purge/flush, and letting the engine get real hot to see if any heat makes it in, all to no avail. I definitely hear a "thump" of sorts when I turn the temperature knob so I'm fairly certain it's not the damper. That leaves the heater core, which does not appear to be leaking, there's no anti-freeze smell, and though my windows sometimes DO get foggy, it doesn't appear to be from that.
My question is, if it is the heater core, how much of a pain in the ass is it to change these things out on 4th gen F-bodies? The core itself can be bought for well under $100 if you look online, but I've heard it's alot of time and agravation to do. Does anyone have some experience with these?
Thanks, Rob