Cylinder Block: Assembly: Crankshaft

• Confirm that correct main bearings are used. Refer to "Inspection" of this section. 
  Fig 1: Identifying Main Bearings

  Courtesy of NISSAN MOTOR CO., U.S.A.

• A plastic zone tightening method is used for tightening main bearing cap bolts. Measure d1 and d2 as shown in the figure. 

  d2: Select minimum diameter in the measuring area. 

  If the difference between d1 and d2 exceeds the limit, replace the bolts with new ones. 

  Limit (d1 - d2): 0.11 mm (0.0043 in) 

  Fig 2: Measuring Main Bearing Cap Bolt

  Courtesy of NISSAN MOTOR CO., U.S.A.
  Fig 3: Identifying Main Bearing Cap Mark

  Courtesy of NISSAN MOTOR CO., U.S.A.

• Make sure that the front mark on the main bearing beam faces the front of the engine. 
• Tightening procedure 
  1. Tighten all bolts to 32 to 38 N.m (3.3 to 3.9 kg-m, 24 to 28 ft-lb) in several different steps. 
  2. Turn all bolts 90 to 95 degrees clockwise with angle wrench. 
• Prior to tightening bearing cap bolts, place bearing beam in its proper position by shifting crankshaft in the axial direction. 
  Fig 4: Tightening Bearing Cap Bolts In Sequence

  Courtesy of NISSAN MOTOR CO., U.S.A.
• After securing bearing cap bolts, make sure crankshaft turns smoothly by hand. 
• Lubricate threads and seat surfaces of the bolts with new engine oil. 

Crankshaft end play: 

Standard 

0.10 - 0.25 mm (0.0039 - 0.0098 in) 

Limit 

0.30 mm (0.0118 in) 

If beyond the limit, replace bearing with a new one.

Fig 5: Measuring Crankshaft End Play

Courtesy of NISSAN MOTOR CO., U.S.A.

• Confirm that correct bearings are used. 
  Fig 6: Installing Connecting Rod Bearings In Connecting Rods And Connecting Rod Caps

  Courtesy of NISSAN MOTOR CO., U.S.A.

1. Install them into corresponding cylinders with Tool.
   • Be careful not to scratch cylinder wall with the connecting rod. 
   • Arrange so that front mark on piston head faces toward engine front. 
     Fig 7: Installing Pistons Into Cylinders With Tool

     Courtesy of NISSAN MOTOR CO., U.S.A.
2. Install connecting rod caps.
   • Lubricate threads and seat surfaces with new engine oil. 
   • Install so that the cylinder number stamped on the connecting rod agrees with that stamped on cap side.
   • Make sure that front mark on the connecting rod cap faces the front of the engine.
     Fig 8: Installing Connecting Rod Caps

     Courtesy of NISSAN MOTOR CO., U.S.A.
3. Re-use connecting rod cap bolts as follows.
   • Make sure that the bolts can be smoothly screwed-in to the end manually.
   • If not, measure the outer diameter "d" shown in the figure.

     Outer diameter "d" of connecting rod cap bolt: 

     Standard 

     7.90 - 8.00 mm (0.3110 - 0.3150 in) 

     Limit 

     7.75 mm (0.3051 in) 

     Fig 9: Measuring Outer Diameter Connecting Rod Cap Bolts

     Courtesy of NISSAN MOTOR CO., U.S.A.
4. Tighten connecting rod cap bolts to the specified torque.

   Connecting rod cap bolt: 

   1. Tighten nuts to 19 to 21 N.m (1.9 to 2.1 kg-m, 14 to 15 ft-lb). 
   2. Turn nuts 90 to 95 degrees clockwise with angle wrench. 
      Fig 10: Tightening Connecting Rod Cap Bolts

      Courtesy of NISSAN MOTOR CO., U.S.A.

Connecting rod side clearance: 

Standard 

0.20 - 0.35 mm (0.0079 - 0.0138 in) 

Limit 

0.40 mm (0.0157 in) 

If beyond the limit, replace connecting rod and/or crankshaft.

Fig 11: Measuring Connecting Rod Side Clearance

Courtesy of NISSAN MOTOR CO., U.S.A.