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Home >> Cadillac >> 2021 >> CT4 V, RWD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 2.7L (L3B) - Repair Instructions - Ct4 (5 Of 6) >> Piston and Connecting Rod Removal and Installation (RWD) >> Cleaning and Inspection Procedure - Required >> Connecting Rod Bearing Clearance (with Micrometer Gauge Internal Measuring Device)

Connecting Rod Bearing Clearance (with Micrometer Gauge Internal Measuring Device)

  1. Install the connecting bearings and the connecting rod bearing caps.
  2. Tighten the connecting rod bearing cap bolts in the following sequence:
      CAUTION:

      Refer to Fastener Caution .

      CAUTION:

      Refer to TORQUE-TO-YIELD FASTENER CAUTION

    1. First Pass: 25 N.m (18 lb ft)
    2. Final Pass: 75 degrees - Use the special tool: EN-45059-A  Angle Meter
  3. GM2189741Courtesy of GENERAL MOTORS COMPANY

    Measure the connecting rod bearing diameters at 3 points (1). Use an internal measuring device.

  4. Calculate the average connecting rod inner diameter.

    Formula: (1. result + 2. result + 3. result) / 3

  5. GM2189634Courtesy of GENERAL MOTORS COMPANY

    Measure the connecting rod journal diameter at 2 points between (1) and (3) and between (2) and (4). Use a micrometer gauge.

  6. Calculate the average connecting rod journal diameter.

    Formula: (1. result + 2. result) / 2.

  7. Subtract the average connecting rod journal diameter from the average connecting rod bearing diameter in order to determine the connecting rod bearing clearance.
  8. Refer to ENGINE MECHANICAL SPECIFICATIONS for the correct value of the connecting rod bearing clearance.
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