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Home >> Nissan-Datsun >> 2004 >> Altima S, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Engine Mechanical - 3.5L) >> Cylinder Block >> Inspection >> Bearing Clearance >> Connecting Rod Bearing (Big End)

Connecting Rod Bearing (Big End)

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  1. Install the connecting rod bearing to the connecting rod and cap.
  2. Install the connecting rod cap to the connecting rod. Tighten to specification. Refer to DISASSEMBLY AND ASSEMBLY  .
  3. Measure the inner diameter "C" of each connecting rod (big end) as shown.
    Fig 1: Checking Connecting Rod Bearing (Big End)
    G02110786Courtesy of NISSAN MOTOR CO., U.S.A.
  4. Measure the outer diameter "Dp" of each crankshaft pin journal.
  5. Calculate the connecting rod bearing clearance.

    Connecting rod bearing clearance = C-Dp 

    1. Standard : 0.034-0.059 mm (0.0013-0.0023 in) 
    2. Limit : 0.070 mm (0.0028 in) 

  6. If the calculated clearance exceeds the specified limit, replace the bearings.
  7. If the clearance cannot be adjusted within the standard of any bearing, grind the crankshaft journal and use undersized bearings.
    Fig 2: Measuring Crankshaft Journal
    G02110787Courtesy of NISSAN MOTOR CO., U.S.A.
  8. If the crankshaft is replaced with a new one, select the connecting rod bearings according to the following table:

    Connecting Rod Bearing Grade Number (Identification Color) 

    Fig 3: View Of Connecting Rod Bearing Grade Number Table
    G02110788Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 4: Locating Crankshaft Grade Numbers
    G02110789Courtesy of NISSAN MOTOR CO., U.S.A.

    These numbers are punched in either Arabic or Roman numerals.