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Home >> Infiniti >> 2018 >> Q70 5.6 Luxe, RWD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical (5.6L) (Except Hybrid) >> Unit Disassembly And Assembly >> How To Select Piston And Bearing >> Main Bearing >> When New Cylinder Block And Crankshaft Are Used

When New Cylinder Block And Crankshaft Are Used

  1. "MAIN BEARING SELECTION TABLE" rows correspond to bearing housing grade on rear side of cylinder block.
    GNSJPBIA2284Z-284Courtesy of NISSAN NORTH AMERICA, INC.

    A

    : Bearing housing grade No. 1

    B

    : Bearing housing grade No. 2

    C

    : Bearing housing grade No. 3

    D

    : Bearing housing grade No. 4

    E

    : Bearing housing grade No. 5

    F

    : Cylinder bore grade No. 1

    G

    : Cylinder bore grade No. 2

    H

    : Cylinder bore grade No. 3

    I

    : Cylinder bore grade No. 4

    J

    : Cylinder bore grade No. 5

    K

    : Cylinder bore grade No. 6

    L

    : Cylinder bore grade No. 7

    M

    : Cylinder bore grade No. 8

    SYMBOL

    : Engine front
  2. "MAIN BEARING SELECTION TABLE" columns correspond to journal diameter grade on front side of crankshaft.
    GNSJPBIA2283Z-283Courtesy of NISSAN NORTH AMERICA, INC.

    A

    : Pin diameter grade No. 1

    B

    : Pin diameter grade No. 2

    C

    : Pin diameter grade No. 3

    D

    : Pin diameter grade No. 4

    E

    : Journal diameter grade No. 1

    F

    : Journal diameter grade No. 2

    G

    : Journal diameter grade No. 3

    H

    : Journal diameter grade No. 4

    I

    : Journal diameter grade No. 5
  3. Select main bearing grade at the point where selected row and column meet in "MAIN BEARING SELECTION TABLE".
    CAUTION:
    • Initial clearance for No. 1, 5 journal and No. 2, 3, 4 journal is different. Use two different selection table for each part.
    • No. 1, 5 journal and No. 2, 3, 4 journal have the same signs but different measures. Never confuse.
  4. Apply sign at crossing in above step 3 to "MAIN BEARING GRADE TABLE".
    NOTE:
    • "MAIN BEARING GRADE TABLE" applies to all journals.
    • Service parts are available as a set of both upper and lower.
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