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Home >> Ford >> 2002 >> Cutaway 7.3 F >> Repair and Diagnosis >> External Pages >> Different car >> Section 2911 (Engine Mechanical - 6.7L 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 2011 Ford Pickup, 2011 Ford F550 Super Duty, 2011 Ford F450 Super Duty, and 2011 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE: Typical cylinder block shown in illustration.
    Fig 1: Checking Cylinder Bore Out-Of-Round
    G07480779Courtesy of FORD MOTOR CO.
  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  in this service information.
  2. Repeat the same procedure at the bottom of the ring travel to check for out-of-round conditions.
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