Part record

6.0L Power Stroke Degas Bottle Pressure Cap

F-250/350/450/550 2003-2007 + Excursion 2003-2005 + E-Series 2004-2010 (catalog rows confirm the cap on E-350 Club Wagon 6.0L diesel 2004-2005; later van years are partial in the dealer catalog - confirm by VIN). Ford 9C3Z-8101-B (Motorcraft RS-527, 16 psi; the same cap also serves 7.3L / 6.4L / 6.7L applications; replaces 8C3Z-8101-A / 9C3Z-8101-A / YC3Z-8100-AA and others). NOTE: the van BOTTLE is a different PN (4C2Z-8A080-AA) - only the cap is shared. A failed cap causes false overheating / coolant-push symptoms; cheap; replace early and rule out before diagnosing head gasket or EGR cooler.