Kia Picanto JA Quiz
Engine Mechanical System

Crankshaft

In this manual: Engine Mechanical System
General Information — 8Maintenance — 30Engine Mechanical System — 46Engine Electrical System — 14Emission Control System — 11Engine Control System/Fuel System — 46Clutch System — 12Manual Transmission — 10Drive Shaft and Axle — 8Suspension System — 15Steering — 9Restraints — 17Brake System — 22Body (Interior and Exterior) — 104Body Electrical System — 80Heating, Ventilation, and Air Conditioning — 17
26steps
~156min
4/5difficulty
0102030405021.616N·mlb·ft
Tightening torque found on this page
Done 0 of 26

Repair Procedures

Disassembly

  1. Remove the engine and transaxle assembly. (Refer to Engine and Transaxle Assembly - "Engine and Transaxle Assembly")
  2. Remove the transaxle assembly from the engine assembly. (See Manual Transaxle System - Manual Transaxle)
  3. Remove the flywheel. (Refer to Cylinder Block Assembly - "Flywheel")
  4. Remove the rear oil seal. (Refer to Cylinder Block Assembly - "Rear Oil Seal")
  5. Install the engine assembly on an engine stand for disassembly.
  6. Remove the cylinder head cover. (Refer to Cylinder Head Assembly - Cylinder Head Cover)
  7. Remove the thermostat housing. (Refer to Cooling System - "Thermostat")
  8. Remove the timing chain. (Refer to Valve Timing System - Timing Chain)
  9. Remove the intake manifold. (Refer to Intake and Exhaust Systems — Intake Manifold)
  10. Remove the turbocharger manifold module. (Refer to Intake and Exhaust System - "Turbocharger Manifold Module")
  11. Remove the cylinder head. (Refer to Cylinder Head Assembly - "Cylinder Head")
  12. Remove the oil pan and oil screen. (Refer to Lubrication System - "Oil Pan")
  13. Remove the ladder frame. (Refer to Cylinder Block - "Cylinder Block")
  14. Remove the piston and connecting rod assembly. (See Cylinder Block Assembly - Piston and Connecting Rod)
  15. Check the oil clearance of the main bearing.
  16. Remove the main bearing caps (A).
  17. Check the crankshaft end play.
  18. Lift the crankshaft (A) out of the engine, taking care not to damage the journals.

Inspection

  1. Check the oil clearance of the crankshaft main bearings.
    1. To check the oil clearance between the main bearing and journal, remove the main bearings.
    2. Clean each main journal and bearing half with a clean shop towel.
    3. Place one strip of Plastigage on each main journal.
    4. Install the bearings and bolts in place in the following manner, tightening them to the specified torque.

      Tightening torque: 17.7–22 N·m + 103–105°

    5. Remove the cap and bearing again and measure the widest part of the Plastigage.

      Standard oil clearance: 0.006–0.024 mm (0.0002–0.0009 in.)

    6. If the Plastigage is too wide or too narrow, remove the upper bearing half, install a new matching bearing with the same color code (select the color as shown in the following column), and recheck the clearance.
    7. If the Plastigage shows the clearance is still incorrect, try the next larger or smaller bearing (the color one above or below this one) and recheck the clearance. Location of the journal hole mark on the crankshaft of the cylinder block. Letters indicating the size of each of the 5 main journal bores are stamped on the front surface of the block. Use them, together with the numbers or bar stamped on the crankshaft (main journal size marks), to select the correct bearings.
      Cylinder Block Main Journal Bore Grade
      Rating Mark Cylinder Block Crankshaft Journal Bore Diameter
      a A 52.000 - 52.006 mm
      (2.0472–2.0475 in.)
      D B 52.006 - 52.012 mm
      (2.0475–2.0477 in.)
      c C 52.012 - 52.018 mm
      (2.0477–2.0480 in.)

      Location of the mark on the crankshaft main journal
      Crankshaft main journal identification
      Grade Mark Outer diameter of the crankshaft main journal
      I 1 47.954 - 47.960 mm
      (1.8880–1.8882 in.)
      II 2 47.948 - 47.954 mm
      (1.8877–1.8880 in.)
      III 3 47.942–47.948 mm
      (1.8875–1.8877 in.)

      Location of the crankshaft main bearing mark
      Crankshaft main bearing identification
      Mark Color Thickness of the crankshaft main bearing
      A Blue 2.026 - 2.029 mm
      (0.0797–0.0798 in.)
      B Black 2.023–2.026 mm
      (0.0796–0.0797 in.)
      C None 2.020–2.023 mm
      (0.0795–0.0796 in.)
      D Green 2.017–2.020 mm
      (0.0794–0.0795 in.)
      E Yellow 2.014–2.017 mm
      (0.0793–0.0794 in.)
    8. Select the bearing from the selection table. Crankshaft Main Bearing Selection Table
      Crankshaft Main Bearing Crankshaft Main Journal Bore Mark on Cylinder Block
      A (A) B (B) C (C)
      Crankshaft main journal mark I (1) E (Yellow) D (green) C (None)
      II (2) D (green) C (None) B (Black)
      III (3) C (None) B (Black) Blue)
  2. Inspect the crankshaft end play. Using a dial indicator, measure the end play while prying the crankshaft forward and backward with a screwdriver.

    Standard end play: 0.07–0.25 mm (0.0028–0.0098 in.)

    If the end play exceeds the maximum, replace the center main bearings as a set. Thrust bearing thickness: 1.925–1.965 mm (0.0757–0.0774 in.). Crankshaft end play: 0.07–0.25 mm (0.0028–0.0098 in.)
  3. Inspect the crankshaft main journals and crankpins. Using a micrometer, measure the diameter of each main journal and crankpin. Main journal diameter: 47.942–47.960 mm (1.8875–1.8882 in.). Crankpin diameter: 38.954–38.972 mm (1.5336–1.5343 in.)

Installation

  1. Install the crankshaft main bearings.
    1. Align the bearing tab with the tab groove of the cylinder block and install the 4 upper bearings (A).
    2. Install the 2 thrust bearings (A) under the No. 2 journal of the cylinder block with the oil grooves facing outward.
  2. Install the crankshaft (A) on the cylinder block.
  3. Install the main bearing cap (A).
    1. Install and tighten the 8 main bearing cap bolts in several passes in the specified sequence.

      Tightening torque: 17.7–22 N·m + 103–105°

    2. Make sure the crankshaft rotates smoothly.
  4. Check the crankshaft end play.
  5. Assemble the remaining components in the reverse order of removal.

Test yourself

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