The Heater core is difficult to replace on the RAM since it is buried in the plenum box. The box has a convenient door panel that you can open to remove and replace the core. The catch is that the convenient door is on the back of the box and you have to remove the heater box to get to it. This involves removing the steering wheel, steering column, complete dash panel, evacuating the AC, draining the radiator, and finally removing the heater box. Once you have the box out(8-12hrs), the core is simple to replace.
You want to be sure that the core is the problem before you undertake this process. If there is a strong smell of antifreeze in the cab or a puddle of coolant on the passenger side floor, the diagnosis is easy.
Check that the radiator is full, not the overflow tank, the radiator. On a cold engine you can remove the radiator cap and check the level. It should be full. If there is air in the system it will affect cab heating and engine cooling.
Another good check is to feel the two heater hoses going into the firewall from a cold start. The hoses should warm up at about the same rate and get uncomfortably hot-close to radiator temperature.
How do you replace a heater core in a 1998 Ford Expedition?"
How do you replace a heater core in a 1998 ford expedition?"
Remove the dash!
how do you get to it
Remove the water supply hoses from your 2002 Dodge Ram 1500 heater core. Remove the heater core retaining bolts. Reverse the process to install the new heater core.
have a professional do it
I wouldn't think you could flush a heater core. you can flush a radiator. Heater core you would have to replace if it is leaking or stopped up
Take it to a mechanic and say "will you fix the heater core?"
Drain the water from the cooling system. Remove the water hose from the heater core. Remove the heater core retaining bolts. Reverse the process to install the new heater core.
the heater core is bad
This is my son-in-laws truck. I have to fix it
Remove the water supply hoses to your 1998 Chevy Lumina heater core. Remove the heater core retaining bolts. Reverse the procedure to install the new heater core.