CRANKSHAFT INSPECTION

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1. Measure the crankshaft end play using a dial gauge.

  • If it exceeds the maximum specification, replace the thrust bearing or crankshaft so that the specified end play is obtained.

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  Crankshaft end play

  Standard
  0.24—0.45 mm {0.0095—0.0177 in}
  Maximum
  0.55 mm {0.021 in}

2. Measure the runout of the main journal using a V-block and dial gauge.

  • If it is at the maximum specification or more, replace the crankshaft.

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  Maximum main journal runout

  0.05 mm {0.0019 in}

3. Inspect the main journal diameter and crank pin diameter. Measurement positions total four and are in the X and Y directions, at two points (A and B) as shown in the figure.

  • If it is not within the specification or if it exceeds the maximum off-round, grind the journal with an oversized bearing.

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  Main journal diameter

  STD
  51.980—52.000 mm {2.0465—2.0472 in}
  OS0.25
  51.730—51.750 mm {2.0367—2.0374 in}
  OS0.50
  51.480—51.500 mm {2.0268—2.0275 in}

  Maximum main journal off-round

  0.05 mm {0.0019 in}

  Crank pin diameter

  STD
  MZR 2.0 DISI, MZR 2.0 DISI i-stop : 46.980—47.000 mm {1.8497—1.8503 in}
  MZR 2.3 DISI Turbo : 51.980—52.000 mm {2.0465—2.0472 in}
  OS0.25
  MZR 2.0 DISI, MZR 2.0 DISI i-stop : 46.730—46.750 mm {1.8398—1.8405 in}
  MZR 2.3 DISI Turbo : 51.730—51.750 mm {2.0367—2.0374 in}
  OS0.50
  MZR 2.0 DISI, MZR 2.0 DISI i-stop : 46.480—46.500 mm {1.8300—1.8307 in}
  MZR 2.3 DISI Turbo: 51.480—51.500 mm {2.0268—2.0275 in}

  Maximum crank pin off-round

  0.05 mm {0.0019 in}

4. Inspect the main journal oil clearance using the following procedure.

  (1) Install the upper main bearing and crankshaft.

  (2) Position a plastigauge on the journals.

  (3) Install the lower main bearing and main bearing cap and tighten the bolts in the order shown in the figure.

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    Tightening procedure
    (1) Apply engine oil to all bolts.
    (2) 3—7 N·m {30.6—71.3 kgf·cm, 26.6—61.9 in·lbf}
    (3) 23—27 N·m {2.4—2.7 kgf·m, 17—19.9 ft·lbf}
    (4) 38—42 N·m {3.9—4.2 kgf·m, 28.1—30.9 ft·lbf}
    (5) Loosen all the bolts (until bolts are torque-free).
    (6) 3—7 N·m {30.6—71.3 kgf·cm, 26.6—61.9 in·lbf}
    (7) 18—22 N·m {1.9—2.2 kgf·m, 13.3—16.2 ft·lbf}
    (8) 87.5°—92.5°

  (4) Loosen the bolts in the reverse order of tightening.

  (5) Measure the main journal oil clearance.

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    • If it is not within the specification, replace the main bearing, or grind the main journal and use oversized bearings so that the specified oil clearance is obtained.
    Main journal oil clearance
    Standard
    0.016—0.039 mm {0.0007—0.0015 in}
    Maximum
    0.10 mm {0.0039 in}
    Main bearing size (UPPER)
    STD
    2.501—2.522 mm {0.0985—0.0992 in}
    OS0.25
    2.623—2.629 mm {0.1033—0.1035 in}
    OS0.50
    2.748—2.754 mm {0.1082—0.1084 in}
    Main bearing size (LOWER)
    STD
    2.501—2.529 mm {0.0985—0.0995 in}
    OS0.25
    2.624—2.630 mm {0.1034—0.1035 in}
    OS0.50
    2.749—2.755 mm {0.1083—0.1084 in}