F 550 4WD Super Duty V8-6.4L DSL Turbo (2008)
Piston Ring: Specifications
Piston Rings
Ring end gap
Top compression ..................................................................................................................................................... 0.29-0.79 mm (0.011-0.031 inch)
Intermediate compression ..................................................................................................................................... 1.42-1.930 mm (0.056-0.076 inch)
Oil control ............................................................................................................................................................. 0.24-0.737 mm (0.009-0.029 inch)
Ring groove width
Upper limit - (measured over 2.10 mm (0.082 inch) gauge pins) ........................................................................................ 96.606 mm (3.8034 inch)
Replacement limit - (measured over 2.10 mm (0.082 inch) gauge pins) .............................................................................. 96.406 mm (3.7955 inch)
Piston ring width ....................................................................................................................................................... 1.990-1.969 mm (0.078-0.077 inch)
Piston ring-to-groove clearance
Intermediate .................................................................................................................................................... 0.050-0.096 mm (0.0020-0.0038 inch)
Oil controlling ................................................................................................................................................. 0.040-0.095 mm (0.0015-0.0037 inch)
