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Home >> Subaru >> 2011 >> Legacy Premium, Automatic CVT >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Engine Mechanical (H4DOTC)) >> Cylinder Block >> Removal

Cylinder Block: Removal

WARNING: This page is about a different variant/trim than selected.
NOTE: Before conducting this procedure, drain the engine oil completely.
  1. Remove the engine from the vehicle. Refer to , REMOVAL , Engine Assembly.
  2. Remove the intake manifold. Refer to INTAKE MANIFOLD .
  3. Remove the crank pulley. Refer to , REMOVAL , Crank Pulley.
  4. Remove the timing belt cover. Refer to , REMOVAL , Timing Belt Cover.
  5. Remove the timing belt. Refer to , REMOVAL , Timing Belt.
  6. Remove the cam sprocket. Refer to , REMOVAL , Cam Sprocket.
  7. Remove the crank sprocket. Refer to , REMOVAL , Crank Sprocket.
  8. Remove the A/C compressor together with the bracket.
  9. Remove the camshaft. Refer to , REMOVAL , Camshaft.
  10. Remove the cylinder head. Refer to , REMOVAL , Cylinder Head.
  11. Remove the clutch disc and cover. Refer to CLUTCH DISC AND COVER .
  12. Remove the flywheel. Refer to FLYWHEEL .
  13. Remove the oil separator cover.
  14. Remove the oil filter. Refer to ENGINE OIL FILTER .
  15. Remove the oil cooler. Refer to ENGINE OIL COOLER .
  16. Remove the water pump. Refer to WATER PUMP .
  17. Remove the bolts which secure oil pump to cylinder block.
    NOTE: When disassembling and checking the oil pump, loosen the relief valve plug before removing the oil pump.
    Fig 1: Removing Oil Pump Bolts
    G04997725Courtesy of SUBARU OF AMERICA, INC.
  18. Remove the oil pump from cylinder block using a flat tip screwdriver.
    CAUTION: Be careful not to scratch the mating surface of the cylinder block and oil pump.
    Fig 2: Removing Oil Pump From Cylinder Block Using Flat Tip Screwdriver
    G04997726Courtesy of SUBARU OF AMERICA, INC.
  19. Remove the front oil seal from the oil pump.
  20. Remove the clip holding the oil level switch harness from cylinder block.
    Fig 3: Removing Oil Level Switch Harness Clip
    G06649449Courtesy of SUBARU OF AMERICA, INC.
  21. Remove the oil pan and cylinder block lower.
    1. Set the part so that the cylinder block LH is on the upper side.
    2. Remove the bolts which secure the oil pan to the cylinder block lower.
    3. Insert an oil pan cutter blade into the gap between cylinder block lower and oil pan, and remove the oil pan.
      CAUTION: Do not use a screwdriver or similar tools in place of oil pan cutter.
    4. Remove the bolts which secure the cylinder block lower to the cylinder block, and remove the cylinder block lower by using flat tip screwdriver.
    CAUTION: Insert the flat tip screwdriver at the position shown in the figure, and avoid scratching the mating surface of the cylinder block and cylinder block lower.
    Fig 4: Locating Flat Tip Screwdriver Inserting Location
    G06650797Courtesy of SUBARU OF AMERICA, INC.
  22. Remove the baffle plate.
  23. Remove blow-by pipe assembly (A), blow-by pipe (B), PCV hose assembly (C) and water pipe assembly (D).
    NOTE: To unlock the clamp of the blow-by pipe assembly (A), blow-by pipe (B) and PCV hose assembly (C), pinch the clamp by fitting the cut out in the ST with the protrusion on the clamp as shown in the figure.

    ST 18353AA000 CLAMP PLIERS

    Fig 5: Identifying Clamp Pliers (ST 18353AA000)
    G06650572Courtesy of SUBARU OF AMERICA, INC.
    Fig 6: Identifying Blow-By Pipe Assembly (A), Blow-By Pipe (B), PCV Hose Assembly (C) And Water Pipe Assembly (D)
    G07912049Courtesy of SUBARU OF AMERICA, INC.
  24. Remove the water by-pass pipe.
    Fig 7: Identifying Water By-Pass Pipe
    G07912050Courtesy of SUBARU OF AMERICA, INC.
    Fig 8: Identifying Cylinder Block Components
    G07912051Courtesy of SUBARU OF AMERICA, INC.
  25. Remove the service hole plugs using a hexagon wrench [14 mm].
    Fig 9: Removing Service Hole Plugs Using Hexagon Wrench
    G04997730Courtesy of SUBARU OF AMERICA, INC.
  26. Remove the service hole cover.
  27. Rotate the crankshaft to bring #1 and #2 pistons to bottom dead center position, then remove the piston snap ring through service hole of #1 and #2 cylinders.
    Fig 10: Removing Piston Snap Ring Through Service Hole
    G04997731Courtesy of SUBARU OF AMERICA, INC.
  28. Draw out the piston pin from #1 and #2 pistons using ST.

    ST 499097700 PISTON PIN REMOVER ASSY

    NOTE: Be careful not to confuse the original combination of piston, piston pin and cylinder.
    Fig 11: Identifying Piston Pin Remover Assy (ST 499097700)
    G05659845Courtesy of SUBARU OF AMERICA, INC.
  29. Similarly remove the piston pins from #3 and #4 pistons.
  30. Remove the cylinder block connecting bolt on the RH side.
  31. Loosen the cylinder block connecting bolt on the LH side by 2 to 3 turns.
  32. Set the part so that the cylinder block LH is on the upper side, and remove the cylinder block connecting bolt.
  33. Separate the cylinder block LH and RH.
    NOTE: When separating the cylinder block, do not allow the connecting rod to fall or damage the cylinder block.
    Fig 12: Exploded View Of Cylinder Block
    G07912055Courtesy of SUBARU OF AMERICA, INC.
  34. Remove the rear oil seal.
  35. Remove the crankshaft together with connecting rod.
  36. Remove the crankshaft bearings from cylinder block using a hammer handle.
    NOTE:
    • Press the crankshaft bearing at the end opposite to locking lip to remove.
    • Be careful not to confuse the crankshaft bearing combination.
  37. Remove each piston from the cylinder block using a wooden bar or hammer handle.
NOTE: Be careful not to confuse the original combination of piston and cylinder.
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