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Piston Inspection

Special Tool(s) 

GFD91351Courtesy of FORD MOTOR COMPANY
Scraper, Piston Ring Groove 303-D033 (D81L-6002-D) or equivalent
NOTE: 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.
    GFD91352Courtesy of FORD MOTOR COMPANY
  2. Use the Piston Ring Groove Scraper to clean the piston ring grooves.

    • Make sure the oil ring holes are clean.

GFD91353Courtesy of FORD MOTOR COMPANY