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Home >> Pontiac >> 2009 >> Vibe Base, 2.4 0, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 164 (Engine Mechanical - 4.6L - Repair Instructions - Off Vehicle) >> Repair Instructions - Off Vehicle >> Engine Block Cleaning and Inspection - Upper >> Cylinder Bore Out-of-Round Measurement Procedure

Cylinder Bore Out-of-Round Measurement Procedure

WARNING: This page is about a different car, the 2011 Cadillac DTS. 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 surface using the J 8087 . 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 102 mm (4.00 in) below the deck surface using the J 8087 . 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.
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