How to replace a thermostat in a 1999 Ford Expedition Eddie Bauer

Hi,

Replacing the thermostat isn't too hard. Just make sure to keep all coolant away from animals. It is very toxic.

To get you started, here is a link that explains how to replace an engine coolant thermostat in general. It can be used to help guide you.

https://www.2carpros.com/articles/replace-thermostat

If you look at the attachments below, they provide the directions and pics specific to this vehicle for replacement.

I hope this helps. Let me know if you have additional questions.

Take care,

Joe

See pics below.