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Home >> Ford >> 1996 >> Aerostar Van Window >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Engine - 4.0L V6 - VIN [X]) >> Overhaul >> Cylinder Block Assembly >> Piston Rings

Piston Rings

WARNING: This page is about a different variant/trim than selected.
  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 3.
Fig 1: Identifying Rod Assembly
G95I57610Courtesy of FORD MOTOR CO.
Fig 2: Positioning Piston & Rod Assembly
G91J13366Courtesy of FORD MOTOR CO.
Fig 3: Positioning Piston Ring End Gaps
G90A15479Courtesy of FORD MOTOR CO.
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