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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 637 (Engine Mechanical - 3.5L (Unit Repair)) >> Repair Instructions >> Engine Block Cleaning and Inspection - Upper >> Measuring Cylinder Bore Out-of-Round

Measuring Cylinder Bore Out-of-Round

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora and 2001 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
  1. Measure both the thrust and non-thrust cylinder diameter 5 mm (0.20 in) below the deck. Record your measurements.
  2. Calculate the difference between the two measurements. The result will indicate out-of-round at the upper end of the cylinder.
  3. Measure both the thrust and non-thrust cylinder diameter at 102 mm (4.00 in) below the deck surface. Record your measurements.
  4. Calculate the difference between the two measurements. The result will indicate out-of-round at the lower end of the cylinder.
  5. Compare your results with the Engine Mechanical Specifications . If the cylinders exceed these specifications, replace the cylinder block. There are no oversized pistons and rings available for service.
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