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Home >> Ford >> 2019 >> Transit-350 Base, Van Cargo Extended, 3.2L Eng VIN V >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine System - General Information >> General Procedures >> Piston Protrusion Check >> Check

Piston Protrusion Check: Check

  1. Verify that the cylinder block deck surface and the pistons are clean.
  2. NOTE: All piston protrusion measurements must fall within the cylinder head gasket numbers. Refer to the Specifications. SPECIFICATIONS .

    The piston protrusion check is done every 120 degrees around the piston and the cylinder block. Avoid raised or etched markings.

    GFD347011Courtesy of FORD MOTOR COMPANY
  3. NOTE: Use a commercially available deck bridge such as the Proform® 66797 Magnetic Deck Bridge or equivalent.

    • Using the dial indicator and a commercially available deck bridge, position at one of the points on the cylinder block deck surface. Use the General Equipment: Dial Indicator

    • Zero the dial indictor on the cylinder block deck surface.

    GFD347012Courtesy of FORD MOTOR COMPANY
  4. NOTE: Only rotate the crankshaft clockwise.
    NOTE: The piston must remain at TDC or an inconsistent reading will result.

    • Position the dial indicator and a commercially available deck bridge, over the piston. Use the General Equipment: Dial Indicator

    • Rotate the crankshaft until the piston is at TDC. Use the General Equipment: Dial Indicator

    • Record the reading.

    GFD347013Courtesy of FORD MOTOR COMPANY
    • Move the dial indicator and the commercially available deck bridge, to the cylinder block deck surface at the opposite position. Use the General Equipment: Dial Indicator

    • Zero the dial indictor on the cylinder block deck surface.

    GFD347011Courtesy of FORD MOTOR COMPANY
    • Move the dial indicator and the commercially available deck bridge, onto the piston at the opposite position. Use the General Equipment: Dial Indicator

    • Record the reading.

    GFD347011Courtesy of FORD MOTOR COMPANY
    • Move the dial indicator and the commercially available deck bridge, to the cylinder block deck surface at the opposite position. Use the General Equipment: Dial Indicator

    • Zero the dial indictor on the cylinder block deck surface.

    GFD347011Courtesy of FORD MOTOR COMPANY
    • Move the dial indicator and the commercially available deck bridge, onto the piston at the opposite position. Use the General Equipment: Dial Indicator

    • Record the reading.

    GFD347011Courtesy of FORD MOTOR COMPANY
  9. Average the readings and record.
  10. Repeat on the remaining pistons.
  11. Determine the cylinder head gasket thickness. Refer to: Specifications .
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