Posted by: @jun-2

Hey how do I flush the Radiator fluid on my 2012 Dodge Avenger with 113,458 miles on it. Hope your Having a good night I messed up in my original post. Hope you’re having a good day. 😁

Providing the radiator plug is good, take a pan and slightly unscrew the plug so the coolant flows in a controlled manner.

Once you're done with the radiator, the block needs cleaned out. Undo the bottom radiator hose. Also, unplug both ends of the heater core. Take the top radiator hose off as well. Get a hose and fully flush everything out. Same goes for the heater core and the block. When you're done, reattach everything, and start filling the radiator with 50/50 coolant and antifreeze specified in your owner's manual.

Fill it up as much as you can, then start the car. The heater core is above the radiator, so in order to fill the heater core again, you need to put jack stands or park the car on an inline, facing up, and slowly start adding more fluid. Set the heater to max hot and turn the hear on full blast. It will "burp" fluid until there's no more air in the system. Once you've filled to the bottom of the radiator neck and there's no burping, it's complete. That's all there is to it.