Nissan 100NX N14 silhouetteN14

Cylinder Block - Inspection (Cont'd)

EM-60prose procedure

Inspection (Cont'd)

Main bearing (Cont'd)

  1. 7
    If clearance cannot be adjusted within the standard of any bearing, grind crankshaft journal and use undersized bearing.
    When grinding crank pin and crank journal:
    a. Grind until clearance is within specified standard bearing clearance.
    b. Fillets should be finished as shown in the figure. R: 2.3 - 2.5 mm (0.091 - 0.098 in)
    Refer to S.D.S. for standard bearing clearance and available spare parts.
    Cross-section detail of a crankshaft journal fillet showing the fillet radius 'R' where the journal meets the cheek. Title label inside the box: 'Main journal and pin journal'. Two arrows labeled 'R' point to the fillet curvature.
    SEM588A
  2. 8
    If crankshaft, cylinder block or main bearing is reused again, measure main bearing clearance. If crankshaft, cylinder block and main bearings are replaced with new ones, it is necessary to select thickness of main bearings as follows:
    a. Grade number of each cylinder block main journal is punched on the respective cylinder block. These numbers are punched in either Arabic or Roman numerals.
    View of the cylinder block lower surface showing main journal grade numbers punched near the bearing webs. A 'Front' arrow points left. Callouts: 'No. 1', 'No. 5', 'Main journal grade number', 'Cylinder block'. Stamped digits read '2 2 2 2'.
    SEM427C
Fillet radius R(0.091 - 0.098 in)
2.3 - 2.5mm

See also

S.D.S.

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