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Method by Calculation Infiniti M45 III facelift

Engine Mechanical (VK45DE) 2 illustrations ~373 words

Method by Calculation

  1. Install connecting rod bearings to connecting rod and cap, and tighten connecting rod bolts to the specified torque. Refer to " «DISASSEMBLY AND ASSEMBLY»(ref-356271-S30354377962010021300000) " for the tightening procedure.
  2. Measure the inner diameter of connecting rod bearing with inside micrometer. (Bearing oil clearance) = (Connecting rod bearing inner diameter) - (Crankshaft pin journal diameter) Standard : 0.020 - 0.045 mm (0.0008 - 0.0018 in) (actual clearance) Limit : 0.055 mm (0.0022 in)
  3. If the calculated value exceeds the limit, select proper connecting rod bearing according to connecting rod big end diameter and crankshaft pin journal diameter to obtain the specified bearing oil clearance. Refer to " «HOW TO SELECT PISTON AND BEARING»(ref-356271-S40808597972010021300000) ".

Scheme 214

Scheme 214: Method of Using Plastigage
Scheme 214: Method of Using Plastigage
  1. Remove oil and dust on crankshaft pin journal and the surfaces of each bearing completely.
  2. Cut plastigage slightly shorter than the bearing width, and place it in crankshaft axial direction, avoiding oil holes.
  3. Install connecting rod bearings to connecting rod and cap, and tighten connecting rod bolts to the specified torque. Refer to " «DISASSEMBLY AND ASSEMBLY»(ref-356271-S30354377962010021300000) " for the tightening procedure. CAUTION: Never rotate crankshaft.
  4. Remove connecting rod bearing cap and bearing, and using scale on plastigage bag, measure the plastigage width. NOTE: The procedure when the measured value exceeds the limit is same as that described in the "Method by Calculation".

Scheme 215

Scheme 215: Method by Calculation
Scheme 215: Method by Calculation
  1. Install main bearings to cylinder block and main bearing caps, and tighten main bearing cap bolts with main bearing to the specified torque. Refer to " «DISASSEMBLY AND ASSEMBLY»(ref-356271-S30354377962010021300000) " for the tightening procedure.
  2. Measure the inner diameter of main bearing with bore gauge. (Bearing clearance) = (Main bearing inner diameter) - (Crankshaft main journal diameter) Standard No. 1 and 5 journal : 0.001 - 0.011 mm (0.00004 - 0.0004 in) No. 2, 3 and 4 journal : 0.007 - 0.017 mm (0.0003 - 0.0007 in) Limit No. 1 and 5 journal : 0.021 mm (0.0008 in) No. 2, 3 and 4 journal : 0.027 mm (0.0011 in)
  3. If the calculated value exceeds the limit, select proper main bearing according to main bearing inner diameter and crankshaft main journal diameter to obtain the specified bearing oil clearance. Refer to " «HOW TO SELECT PISTON AND BEARING»(ref-356271-S40808597972010021300000) ".