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Piston Rings

WARNING: This page is about a different car, the 1995 Ford Aerostar. However, it is still accessible from the selected car via links, so may be relevant.
  1. Select rings for bore diameter. Place ring in cylinder bore in which it will be installed. Using piston to square ring in bore, place ring below normal ring wear area. Measure ring end gap. If gap is too small, file material from end of ring. If ring gap exceeds specification, try another ring set. See 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
G90A15479Courtesy of FORD MOTOR CO.
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