Ford 2003 Mustang Workshop Manual page 960

8. Remove the heater bypass tube. For additional information, refer to
9. Disconnect the heater hose.
10. Disconnect the exhaust gas recirculation (EGR) vacuum tube.
11. Disconnect the EGR tube from the EGR valve.
12. Disconnect the radiator upper hose and coolant bypass hose.
Section 303-03A .