F 150 4WD V8-5.4L Flex Fuel (2008)
2. NOTE: For precision fit, new pistons are divided into 3 categories within each size range based on their relative position within the range. A paint
spot or specific size grade on a new piston indicates the position within the size range.
Choose the piston with the correct paint color or specific size grade.
Piston Ring End Gap
CAUTION: Use care when fitting piston rings to avoid possible damage to the piston ring or the cylinder bore.
NOTE: Piston rings should not be transferred from one piston to another.
NOTE: The cylinder bore must be within specification for taper and out-of-round.
1. Use a piston without rings to push a piston ring in a cylinder to the bottom of ring travel.
2. Use a feeler gauge to measure the top piston ring end gap and the second piston ring end gap.
