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Home >> Ford >> 2003 >> Cutaway 7.3 F >> Repair and Diagnosis >> External Pages >> Different car >> Section 2471 (Engine Mechanical - 6.4L 99R Diesel -- F250-F550 Super Duty) >> General Procedures >> Cylinder Bore Out-of-Round

Cylinder Bore Out-of-Round

WARNING: This page is about a different car, the 2010 Ford Pickup, 2010 Ford F550 Super Duty, 2010 Ford F450 Super Duty, and 2010 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. Use a cylinder bore gauge to check the cylinder bore for out-of-round conditions.
    • Measure the diameter of the cylinder bore at the top of piston travel. Be sure to measure at a right angle to the center line of the crankshaft. Record the reading as dimension A.
    • Measure the bore so that the gauge reading coincides with the center line of the crankshaft. Record the reading as dimension B.
    • The difference between dimension A and dimension B is the out-of-round condition at the top of the cylinder bore. For additional information, refer to SPECIFICATIONS .
      Fig 1: Measuring Cylinder Bore Out-Of-Round
      G06774005Courtesy of FORD MOTOR CO.
  2. Repeat the same procedure at the bottom of the ring travel to check for out-of-round conditions.
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