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Connecting Rod Bearing Journal-to-Bearing Clearance

NOTE: Refer to the appropriate ENGINE - 3.5L for the specification.
NOTE: The crankshaft connecting rod journals must be within specifications to check the connecting rod bearing journal clearance.
  1. Remove the connecting rod bearing cap.
  2. Position a piece of Plastigage across the bearing surface.
    Fig 1: Positioning Piece Of Plastigage Across Bearing Surface
    G06064093Courtesy of FORD MOTOR CO.
  3. NOTE: Do not turn the crankshaft during this step.
  4. Install and tighten to specifications, then remove the connecting rod bearing cap.
  5. Measure the Plastigage to get the connecting rod bearing journal clearance. The Plastigage should be smooth and flat. A changing width indicates a tapered or damaged connecting rod or connecting rod bearing.
    Fig 2: Measuring Plastigage To Connecting Rod Bearing Journal Clearance
    G06064094Courtesy of FORD MOTOR CO.