How to properly bleed cooling system

Originally Posted by cooljess76

There's a lot more to it than just removing the bleed screw and filling the expansion tank. This is why people have to go back and rebleed over and over.

Start by parking on an incline so the nose of the vehicle is angled upward. Air bubbles travel up. With a cool/running engine, turn the heater on full blast. By full blast, I mean turn the temp knob on the HVAC panel to full red and turn the fan all the way to the highest setting. This will allow coolant to circulate through the heater core. Now, pop the hood and remove the radiator fill cap and bleed screw. Slowly add coolant/water to the radiator expansion tank. Continue to fill until you see coolant exiting the bleed hole. You can assist the air bubbles by tapping on the top of the radiator and massaging the radiator hoses. Once you see a steady stream of coolant with no bubbles flowing out of the bleed hole, replace the bleed screw and fill cap. Drive around the block a few times, park on the same incline, let the engine cool and repeat the process 3 or 4 times.

Thanks!