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Piston Inspection: Procedure

CAUTION: Do not use a caustic cleaning solution or a wire brush to clean the pistons or damage can occur.
  1. Clean and inspect the (1) ring lands, (2) skirts, (3) pin bosses, and the (4) tops of the pistons. If wear marks, scores or glazing is found on the piston skirt, check for a bent or twisted connecting rod.
    Fig 1: Inspecting Ring Lands, Skirts, Pin Bosses & Tops Of Pistons
    G03442260Courtesy of FORD MOTOR CO.
  2. Use the Piston Ring Groove Scraper to clean the piston ring grooves.
    • Make sure the oil ring holes are clean.
    Fig 2: Cleaning Piston Ring Grooves Using Piston Ring Groove Scraper
    G03442261Courtesy of FORD MOTOR CO.
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