F 550 2WD Super Duty V8-6.4L DSL Turbo (2008)
Piston: Specifications
Piston
Diameter
Standard size ............................................................................................................................................... 98.114-98.146 mm (3.8630-3.8640 inch)
0.254 mm (0.010 inch) oversize .................................................................................................................. 98.368-98.400 mm (3.8730-3.8740 inch)
0.508 mm (0.020 inch) oversize .................................................................................................................. 98.622-98.654 mm (3.8830-3.8840 inch)
0.762 mm (0.030 inch) oversize .................................................................................................................. 98.876-98.908 mm (3.8930-3.8940 inch)
Clearance to cylinder bore .................................................................................................................................... 0.045-0.095 mm (0.0018-0.0037 inch)
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)
Piston pin
Bore diameter .............................................................................................................................................. 38.511-38.512 mm (1.5162-1.5165 inch)
Pin diameter ................................................................................................................................................ 38.491-38.501 mm (1.5154-1.5158 inch)
Pin length ................................................................................................................................................................... 74.6-75 mm (2.937-2.953 inch)
Fit to piston ..................................................................................................................................................... 0.011-0.027 mm (0.0004-0.0011 inch)
