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Piston Rings

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  1. Select rings for bore diameter. Place ring in cylinder bore in which it will be installed. Use piston to square ring in bore and place ring below normal ring wear area. Measure ring end gap. If ring gap is too small, file end of ring until within specification. If ring gap exceeds specification, try another ring set. See, in this article, PISTONS PINS & RINGS  table under ENGINE SPECIFICATIONS.
  2. Check side clearance of rings after installing on piston. Ensure clearance is within specification around entire circumference. Replace piston and/or rings if clearance is not within specification. See PISTONS PINS & RINGS  table. Ensure rings are properly spaced on piston before installing pistons into cylinder. See Fig 1.
Fig 1: Positioning Piston Ring End Gaps
G95A26989Courtesy of FORD MOTOR CO.
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