Replacement Instructions
“All 6.4L Power Stroke engines built after 11/24/2008 are equipped with an EGR Valve that is no longer water cooled. Figure 1 shows an early style EGR Valve that incorporates the cooling circuit and Figure 2 shows the new, updated style EGR Valve with no cooling circuit. All AP63456 EGR Valves are the new style with no coolant line connections and are to be used on all 6.4L models.
***For trucks built before 11/24/2008***
After installation of the new EGR Valve, remove 9 inches from the coolant line that originally fed the EGR Valve as shown in Figure 1. Next relocate the cut end of the hose to the location shown in Figure 2. The remaining hose shown in Figure 1 should be removed and discarded.”