CONNECTING ROD INSPECTION

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  Caution
  • The piston, piston pin and connecting rod (semi-floating type piston pin) cannot be disassembled.
  • When replacing the piston, piston pin, snap ring and connecting rod (semi-floating type piston pin), replace them together as a single unit.

1. Install the connecting rod cap. (See CYLINDER BLOCK ASSEMBLY (I).)

2. Measure the connecting rod large end side clearance.

  Semi-floating type piston pin

  • If it exceeds the specification, replace the piston, piston pin, piston ring and connecting rod as a single unit.

  Full floating type piston pin

  • If it exceeds the specification, replace the piston, piston pin, snap ring and connecting rod.

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  Standard clearance

  0.14—0.36 mm {0.0056—0.0141 in}

  Maximum clearance

  0.435 mm {0.0172 in}

3. Remove the connecting rod cap.

4. Position plastigauge atop the journals in the axial direction.

5. Install the connecting rod bearing and connecting rod cap. (See CYLINDER BLOCK ASSEMBLY (I).)

6. Remove the connecting rod cap.

7. Measure the connecting rod oil clearance.

  • If it exceeds the specification, replace the connecting rod bearing or grind the crank pin and use oversize bearings so that the specified clearance is obtained.

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  Standard clearance

  0.026—0.052 mm {0.0011—0.0020 in}

  Maximum clearance

  0.1 mm {0.0039 in}

  Connecting rod bearing size

  L8, LF
  STD: 1.498—1.522 mm {0.0589—0.0599 in}
  OS 0.25: 1.623—1.629 mm {0.0639—0.0641 in}
  OS 0.50: 1.748—1.754 mm {0.06882—0.06905 in}
  L3
  STD: 1.496—1.520 mm {0.0589—0.0598 in}
  OS 0.25: 1.621—1.627 mm {0.0639—0.0640 in}
  OS 0.50: 1.746—1.752 mm {0.06875—0.06897 in}
  L5
  STD: 1.497—1.521 mm {0.05894—0.05988 in}
  OS 0.25: 1.622—1.628 mm {0.06386—0.06409 in}
  OS 0.50: 1.747—1.753 mm {0.06878—0.06901 in}

  Caution
  • If a malfunction is found during the Piston and connecting rod oscillation torque for the full floating type piston pin, inspect the inner diameter of the connecting rod at the small end.

8. Measure the connecting rod small end using a caliper gauge.

  • If not exceeds the specification, replace the connecting rod.

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  Standard inner diameter

  LF (Full floating type piston pin): 20.935—20.946 mm {0.82422—0.82464 in}
  L5: 20.010—20.021 mm {0.78780—0.78822 in}

9. Calculate the clearance between the connecting rod small end inner diameter and the new piston pin outer diameter.

  • If not exceeds the specification, replace the connecting rod.

  Standard clearance

  0.010—0.026 mm {0.0004—0.0010 in}