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Home >> Chevrolet >> 2014 >> Express 1500 LS, RWD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 4.8L (L20), 5.3L (LMF), Or 6.0L (L96 LC8) - Repair Instructions - Off Vehicle >> 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

    Fig 1: View Of Gaging Plastic Installed On Crankshaft Journal
    GM4980Courtesy of GENERAL MOTORS COMPANY
    IMPORTANT:
    • 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 is 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 COMPANY
  5. Using the scale supplied with the plastic gaging kit, measure the gaging plastic at its widest area. Refer to Engine Mechanical Specifications (RPO LMF VIN 4) , Engine Mechanical Specifications (RPO L20 VIN A) , Engine Mechanical Specifications (RPO LC8 VIN B) , Engine Mechanical Specifications (RPO L96 VIN G) .
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