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Home >> Cadillac >> 2006 >> STS Base, 3.6 7, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 20 (Engine Mechanical - 4.4L (3 Of 5)) >> Off-Vehicle Repair Instructions (Part 2) >> Engine Block Cleaning and Inspection - Upper - Off Vehicle >> Cylinder Bore Out-of-Round Measurement Procedure

Cylinder Bore Out-of-Round Measurement Procedure

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  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.