how do you change antifreeze

jvm1x
25

Asked by jvm1x Jan 05, 2008 at 09:55 AM about the 2003 Ford Expedition Eddie Bauer

Question type: Maintenance & Repair

How do you change the antifreeze on this truck. I want to flush it and replace completely

1 Answer

littlehorn
26,235

You will need to find the radiator petcock on the bottom of the radiator, usually passenger side. Open it. Open the radiator cap (not the coolant overflow bottle cap) and run a hose into it. I usually run the engine with the hose filling and the fluid draining until most of what is coming out of the radiator is clear -- water. Then you can let the radiator drain one more time, shut the hose off, and fill with 100% antifreeze, as what you are leaving in the block should be mostly water. This is pretty close to a 50/50 mixture. I've done it this way for years and never had any problems. An easier way (due to how hard it is to find someone who takes used antifreeze anymore) is to get a garage to machine-flush it for about $80. This is what I do anymore.

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