Expansion Tank

[bdcanetti]

Originally Posted by gregg3gs

Few more thing to add:

- mix the coolant with distilled water (50/50 in most cases)
- after you replace the tank, make sure you air out the cooling system (turn the car on, do not start the engine, turn hvac on, set temp to the highest you ca, turn the fan to the lowest fan speed you can, leave on for 15 minutes, listen for pump running: front of the car driver side)

Keep in mind that is not true for the 4.8i. That was the case on my 4.4i and I believe it may be for the 3.0 but on the 4.8i there is no such bleed procedure. You just fill, leave cap off run at idle for a few minutes, refill if necessary and you're done. WSMEYER explains above as well.