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Home >> Buick >> 2009 >> Allure CX >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Mechanical - 5.3L) >> Repair Instructions - Off Vehicle >> Crankshaft and Bearing Cleaning and Inspection >> Measuring Connecting Rod Bearing Clearance - Gaging Plastic Method

Measuring Connecting Rod Bearing Clearance - Gaging Plastic Method

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    Fig 1: View Of Gaging Plastic Installed On Crankshaft Journal
    GM4980Courtesy of GENERAL MOTORS CORP.
    NOTE:
    • Connecting rod bearings are a precision insert type. Connecting rods are of a powdered metal design and cannot be shimmed or filed for bearing fit. If clearances are found to be excessive, a new bearing and/or connecting rod are required.
    • Do not rotate the crankshaft while gaging plastic is between the crankshaft journal and the bearing surface.
  1. Remove the bearing cap, bearing half and bolts. Refer to Piston, Connecting Rod, and Bearing Removal .
  2. Install the gaging plastic onto the connecting rod bearing journal. Install the gaging plastic the full width of the journal.
  3. Install the bearing cap, bearing half, and bolts. Refer to Piston, Connecting Rod, and Bearing Installation .
  4. Remove the bearing cap, bearing half and bolts. Refer to Piston, Connecting Rod, and Bearing Removal .
    5. Fig 2: Measuring Gaging Plastic
    GM4981Courtesy of GENERAL MOTORS CORP.
  5. Measure the gaging plastic at its widest area using the scale supplied with the plastic gaging kit. Refer to Engine Mechanical Specifications .
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