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Home >> Subaru >> 2006 >> Legacy GT spec.B >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Engine Mechanical (H4SO)) >> 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 intake manifold. < Ref. to REMOVAL , Intake Manifold. >
  2. Remove the V-belts. < Ref. to REMOVAL , V-belt. >
  3. Remove the crank pulley. < Ref. to REMOVAL , Crank Pulley. >
  4. Remove the timing belt cover. < Ref. to REMOVAL , Timing Belt Cover. >
  5. Remove the timing belt. < Ref. to REMOVAL , Timing Belt. >
  6. Remove the cam sprocket. < Ref. to REMOVAL , Cam Sprocket. >
  7. Remove the crank sprocket. < Ref. to REMOVAL , Crank Sprocket. >
  8. Remove the generator and A/C compressor with their brackets.
  9. Remove the rocker cover.
  10. Remove the cylinder head bolts in alphabetical sequence shown in the figure.
    NOTE: Leave bolts (a) and (d) engaged by three or four threads to prevent the cylinder head from falling.
    Fig 1: Removing Sequence Of Cylinder Head Bolts
    G05017145Courtesy of SUBARU OF AMERICA, INC.
  11. While tapping the cylinder head with a plastic hammer, separate it from cylinder block.
  12. Remove the bolts (a) and (d) to remove cylinder head.
    Fig 2: Removing Sequence Of Cylinder Head Bolts
    G05017146Courtesy of SUBARU OF AMERICA, INC.
  13. Remove the cylinder head gasket.
    NOTE: Do not scratch the mating surface of cylinder head and cylinder block.
  14. Similarly, remove the right side cylinder head.
  15. Remove the clutch housing cover. (MT model)
  16. Remove the flywheel (MT model) or drive plate (AT model).

    Using the ST, lock the crankshaft.

    ST 498497100 CRANKSHAFT STOPPER

    • MT model
      Fig 3: Locking Crankshaft Using Crankshaft Stopper ST (498497100)- MT Model
      G04997722Courtesy of SUBARU OF AMERICA, INC.
    • AT model
      Fig 4: Locking Crankshaft Using Crankshaft Stopper ST (498497100)- AT Model
      G04997723Courtesy of SUBARU OF AMERICA, INC.
  17. Remove the oil separator cover.
  18. Remove the water bypass pipe for heater.
  19. Remove the water pump after loosening the bolts in alphabetical sequence as shown in the figure.
    Fig 5: Removing Sequence Of Water Pump Bolts
    G04997724Courtesy of SUBARU OF AMERICA, INC.
  20. Remove the bolts which install oil pump onto cylinder block.
    NOTE: When disassembling and checking the oil pump, loosen the relief valve plug before removing the oil pump.
    Fig 6: Identifying Bolts
    G04997725Courtesy of SUBARU OF AMERICA, INC.
  21. Remove the oil pump from cylinder block using a flat tip screwdriver.
    CAUTION: Be careful not to scratch the mating surface of cylinder block and oil pump.
    Fig 7: Removing Oil Pump Using Flat Tip Screwdriver
    G04997726Courtesy of SUBARU OF AMERICA, INC.
  22. Remove the oil pan.
    1. Place the cylinder block to face the #2 and #4 piston side upward.
    2. Remove the bolts which secure oil pan to cylinder block.
    3. Insert an oil pan cutter blade between cylinder block-to-oil pan clearance and remove the oil pan.
    NOTE: Do not use a screwdriver or similar tools in place of oil pan cutter.
  23. Remove the oil strainer stay.
  24. Remove the oil strainer.
  25. Remove the baffle plate.
  26. Remove the oil filter. < Ref. to A: REMOVAL , Engine Oil Filter. >
  27. Remove the water pipe.
    Fig 8: Identifying Water Pipe
    G04997728Courtesy of SUBARU OF AMERICA, INC.
    Fig 9: Identifying Cylinder Block Components
    G05017153Courtesy of SUBARU OF AMERICA, INC.
  28. Remove the service hole cover and service hole plugs using a hexagon wrench [14 mm].
    Fig 10: Removing Service Hole Plug Using Hexagon Wrench
    G04997730Courtesy of SUBARU OF AMERICA, INC.
  29. 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 11: Removing Piston Snap Ring Through Service Hole
    G04997731Courtesy of SUBARU OF AMERICA, INC.
  30. Draw out the piston pin from #1 and #2 pistons using ST.

    ST 499097700 PISTON PIN REMOVER

    NOTE: Be careful not to confuse the original combination of piston, piston pin and cylinder.
    Fig 12: Drawing Out Piston Pin From Pistons Using ST (499097700)
    G04997732Courtesy of SUBARU OF AMERICA, INC.
  31. Similarly remove the piston pins from #3 and #4 pistons.
  32. Remove the bolts which connect cylinder block on the side of #2 and #4 cylinders.
  33. Back off the bolts which connect cylinder block on the side of #1 and #3 cylinders two or three turns.
  34. Set up the cylinder block so that #1 and #3 cylinders are on the upper side, then remove the cylinder block connecting bolts.
  35. Separate the cylinder block (RH) and (LH).
    NOTE: When separating the cylinder block, do not allow the connecting rod to fall or damage the cylinder block.
    Fig 13: Identifying Cylinder Block Components
    G05017157Courtesy of SUBARU OF AMERICA, INC.
  36. Remove the rear oil seal.
  37. Remove the crankshaft together with connecting rod.
  38. Remove the crankshaft bearings from cylinder block using a hammer handle.
    NOTE: Be careful not to confuse the crankshaft bearing combination. Press the bearing at the end opposite to locking lip.
  39. Draw out each piston from cylinder block using wooden bar or hammer handle.
    NOTE: Be careful not to confuse the original combination of piston and cylinder.
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