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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 Taper Measurement Procedure

Cylinder Bore Taper Measurement Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Measure the cylinder bore along the thrust surfaces at 5 mm (0.200 in) below the deck surface with the bore gage perpendicular to the crankshaft centerline and record the measurements.
  2. Measure the cylinder bore along the thrust surfaces at 102 mm (4.000 in) below the deck surface with the bore gage perpendicular to the crankshaft centerline and record the measurements.
  3. Calculate the difference between the two measurements. The result will be the cylinder taper.
  4. Compare your results with the engine mechanical specifications. If the cylinders exceed these specifications, replace the cylinder block.
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