Crown Victoria V8-4.6L Flex Fuel (2008)
Piston: Specifications
Piston
Diameter
Grade 1 ........................................................................................................................................................ 90.191-90.206 mm (3.5508-3.5514 inch)
Grade 2 ........................................................................................................................................................ 90.203-90.220 mm (3.5513-3.5519 inch)
Grade 3 ........................................................................................................................................................ 90.217-90.232 mm (3.5518-3.5524 inch)
Clearance-to-cylinder bore @ 43 mm from top a ................................................................................. -0.005 to + 0.025 mm (-0.0002 to + 0.0010 inch)
a New pistons have a coating that may cause the piston-to-bore clearance to read negative, indicating the piston is slightly larger than the bore. This
coating will wear off and should not be a cause of concern.
Pin bore diameter .......................................................................................................................................... 22.0065-22.0110 mm (0.8664-0.8666 inch)
Piston Rings
End gap
Top ...................................................................................................................................................................... 0.15-0.30 mm (0.0059-0.0118 inch)
Intermediate ........................................................................................................................................................ 0.15-0.30 mm (0.0059-0.0118 inch)
Oil control ........................................................................................................................................................... 0.15-0.30 mm (0.0059-0.0118 inch)
Ring groove width
Top .................................................................................................................................................................. 1.520-1.540 mm (0.0598-0.0606 inch)
Intermediate .................................................................................................................................................... 1.520-1.540 mm (0.0598-0.0606 inch)
Oil control ......................................................................................................................................................... 3.03-3.055 mm (0.1193-0.1203 inch)
Ring width
Top ................................................................................................................................................................................................ 1.5 mm (0.05 inch)
Intermediate ................................................................................................................................................................................... 1.5 mm (0.05 inch)
Ring-to-groove clearance
Top .................................................................................................................................................................. 0.020-0.060 mm (0.0008-0.0024 inch)
Intermediate .................................................................................................................................................... 0.020-0.060 mm (0.0008-0.0023 inch)
Oil control ....................................................................................................................................................... 0.030-0.070 mm (0.0012-0.0028 inch)
Pin bore diameter .......................................................................................................................................... 22.0065-22.0110 mm (0.8664-0.8666 inch)
Piston Pin
Diameter ............................................................................................................................................................ 21.995-21.997 mm (0.8659-0.8660 inch)
Length ............................................................................................................................................................... 61.870-62.120 mm (2.4358-2.4456 inch)
Fit-to-piston ......................................................................................................................................................... 0.0095-0.016 mm (0.0004-0.0006 inch)
Clearance-to-connecting rod ......................................................................................................................................... 6.58-7.58 mm (0.259-0.298 inch)
