Grand Marquis V8-4.6L VIN V Flex Fuel (2006)
Measure the piston pin bore diameter in 2 directions on each side. Verify the diameter is within specification.
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If out of specification, install new components as necessary.
Piston - Diameter
1. Measure the piston diameter 90 degrees from the piston pin and 42 mm (1.65 inch) down from the top of the piston at the point indicated.
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If out of specification, install new components as necessary.
Piston - to Cylinder Bore Clearance
1. Subtract the piston diameter from the cylinder bore diameter to find the piston-to-cylinder bore clearance.
Piston - Selection
NOTE: The cylinder bore must be within the specifications for taper and out-of-round before fitting a piston.
