i have a 2000 Durango R/T 5.9 motor in the past 4 months i have changed the cylinder heads changed the thermostat to a 195 degree super stant before that i had a cheaper thermostat in there so i thought that was the problem turns out it was not. I changed the thermostat housing flushed the heater core backwards and forwards with a garden hose for 5 minutes each way. iI have chaged the coolant 60/40 mix since i live in chicago. Just to clear things up i have owned the truck for 2 years this is the second winter and the truck has never had good heat the cylinder heads were cracked causing misfires thats why those were changed. I am not low on coolant. when i speed up the heat works a little better but at idle it is not good enough. Has anyone ever thought about cutting the firewall to get at the heater core i do not want to take the dash apart.

 

I think that would be pretty tough to pull off. I did the heater core on my ram, I know it's a pain. If I remember correctly, you have to pull you heater core up out of a slot, and I'm pretty sure that wouldn't be possible through the firewall

 

IF, you had a bad WISdom tooth , would You cut the back of yer Cheek...to get to it Easier....maybe thats a good analogy...Sorry, but just my opinion!

 

not going to work. the heater core sits inside a bracket inside an air box behind the dash, you'd have a big old mess on your hands.

 

I looked at doing this once but couldn't figure out a way to get it out because of design. Go look in a junk yard at a few.