Expedition 4WD V8-4.6L SOHC VIN 6 (1997)
Piston: Testing and Inspection
Piston Selection
NOTE: The cylinder bore must be within specification for taper and out-of-round before fitting a piston.
1. Select a piston size based on the cylinder bore.
2. Choose the piston with the proper paint color.
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Red-in the lower third of the size range.
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Blue-in the middle third of the size range.
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Yellow-in the upper third of the size range.
NOTE: For precision fit, new pistons are divided into three categories within each size range based on their relative position within the range. A
paint spot on the new pistons indicates the position within the size range.
