Step 1 : Using a funnel start slowly pouring the coolant mix into the overflow tank.
Note : Take your time when pouring coolant back into your car The car will only accept new coolant at a certain rate and will easily overflow Do everything you can to avoid spilling coolant.
Step 2 : Fill the coolant up to the ( Cold ) mark on the passenger side of the tank You will find that if you wait a few moments when it gets to this mark the fluid level will go down Keep adding more fluid until it stops going down and stays at the Cold mark.
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Step 3 : Loosen the radiator bleed screw.
Step 4 : Turn the ignition to the On position .
Step 5 : Continue to slowly add coolant - adding more after the level has dropped.
Step 6 : Eventually coolant will start to bubble out of the bleed screw. When the bubbling has stopped and only fluid comes out of the bleed screw hole tighten the bleed screw while continuing to pour.
Step 7 : Replace the radiator cap.
Step 8 : Start the car and let it heat to the normal operating temperature.
Step 9 : Check for any obvious coolant leaks
BMW lover