Connecting Rod Bearing Oil Clearance

Method by Calculation 

• Install connecting rod bearings (2) to connecting rod (3) and connecting rod bearings cap (1) and tighten connecting rod bolts. Refer to CYLINDER BLOCK : Disassembly & Assembly .

  Courtesy of NISSAN NORTH AMERICA, INC.

• Measure inner diameter (A) of connecting rod bearing using suitable tool.
• (Bearing oil clearance) = (Connecting rod bearing inner diameter) - (Crankshaft pin journal diameter)

  Standard and Limit

  : Refer to CYLINDER BLOCK : Service Data .

• If measured value exceeds limit select proper connecting rod bearing. Use connecting rod big end diameter and crankshaft pin journal diameter to obtain specified bearing oil clearance.

Method by Using Plastigage 

• Remove engine oil and dust on crankshaft pin and the surfaces of each bearing completely.
• Cut plastigage slightly shorter than bearing width and place it in crankshaft axial direction avoiding oil holes.
• Install connecting rod bearings to connecting rod and cap and tighten connecting rod bolts. Refer to CYLINDER BLOCK : Disassembly & Assembly .
  CAUTION: Do not rotate crankshaft.
• Remove connecting rod cap and bearing and using the scale (A) on the plastigage bag measure the plastigage width.

  Courtesy of NISSAN NORTH AMERICA, INC.

  NOTE: The procedure when the measured value exceeds the limit is same as that described in the "Method by Calculation".