Nissan Micra K11 silhouetteK11

CYLINDER BLOCK — Inspection (Cont'd) / Main Bearing Grade Selection

EM-51prose procedure
Continued from EM-50

Inspection (Cont'd)

Crank journal fillet radius — CG10DEAfter grinding
R2.3 - 2.7mm
Crank journal fillet radius — CG13DEAfter grinding
R1.5mm
Journal-to-counterweight fillet (both engines)After grinding
R2.3 - 2.7mm

Main bearing grade selection

  1. 8
    If crankshaft, cylinder block or main bearing is reused, 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:
    1. Grade number of each cylinder block main journal is punched on the respective cylinder block.
      Cylinder block lower face showing the row of main journal grade numbers stamped between bores; positions labelled No.1 to No.5. Label: Main journal grade number.
      UEM089
    2. Grade number of each crankshaft main journal is punched on the respective crankshaft.
      End view of crankshaft showing the row of crank journal grade numbers stamped on the counterweight; positions labelled No.1 to No.5. Label: Crank journal grade number.
      UEM090
    3. Select main bearing with suitable thickness according to the following table.

Main bearing grade color

0
Main journal grade number 0Black
Main journal grade number 1Brown
Main journal grade number 2Green
Main journal grade number 3Yellow
1
Main journal grade number 0Brown
Main journal grade number 1Green
Main journal grade number 2Yellow
Main journal grade number 3Blue
2
Main journal grade number 0Green
Main journal grade number 1Yellow
Main journal grade number 2Blue
Main journal grade number 3Pink
3
Main journal grade number 0Yellow
Main journal grade number 1Blue
Main journal grade number 2Pink
Main journal grade number 3White
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