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Home >> Subaru >> 2019 >> WRX Base >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical System (Except For STI) >> Cylinder Block >> Removal
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Cylinder Block: Removal

  1. Remove the engine from the vehicle. Refer to MECHANICAL (EXCEPT FOR STI)>ENGINE ASSEMBLY>REMOVAL .
  2. Remove the crankshaft position sensor plate with drive plate. (CVT model) Refer to CONTINUOUSLY VARIABLE TRANSMISSION (TR690)>DRIVE PLATE>REMOVAL .
  3. Remove the clutch disc and cover. (MT model) Refer to CLUTCH SYSTEM>CLUTCH DISC AND COVER>REMOVAL .
  4. Remove the crankshaft position sensor plate with flywheel. (MT model) Refer to CLUTCH SYSTEM>FLYWHEEL>REMOVAL .
  5. Remove the cylinder head. Refer to MECHANICAL (EXCEPT FOR STI)>CYLINDER HEAD>REMOVAL .
  6. Remove the crank sprocket. Refer to MECHANICAL (EXCEPT FOR STI)>CRANK SPROCKET>REMOVAL .
  7. Remove the engine rear hanger from cylinder block RH.
    G09480539Courtesy of SUBARU OF AMERICA, INC.
  8. Remove the bolts securing the water pipe assembly and PCV connector to the cylinder block, and remove the water pipe assembly and PCV connector as a set from cylinder block.
    G11267061Courtesy of SUBARU OF AMERICA, INC.
  9. Remove the O-ring from the cylinder block and PCV connector.
    G11267062Courtesy of SUBARU OF AMERICA, INC.
  10. Remove the knock sensor from cylinder block LH.
    G09480542Courtesy of SUBARU OF AMERICA, INC.
  11. Remove the PCV valve from the cylinder block RH.
    G09480543Courtesy of SUBARU OF AMERICA, INC.
  12. Remove the bolts securing the crankshaft position sensor holder from the cylinder block LH, and remove the crankshaft position sensor with crankshaft position sensor holder.
    G09480544Courtesy of SUBARU OF AMERICA, INC.
  13. Remove the oil pan upper. Refer to LUBRICATION (EXCEPT FOR STI)>OIL PAN>REMOVAL>OIL PAN UPPER .
  14. Set the part so that the cylinder block RH is on the upper side.
  15. Remove the #1 and #3 connecting rod caps and pistons from the cylinder block.
    NOTE: Mark each connecting rod cap and piston with a cylinder number.
    1. Turn the crankshaft so that the #1 connecting rod cap (A) is located at the position shown in the figure using ST.

      ST 18252AA000 CRANKSHAFT SOCKET 

      G09480548Courtesy of SUBARU OF AMERICA, INC.
    2. Using ST, loosen the #1 connecting rod cap bolt, and remove the #1 connecting rod cap bolt and #1 connecting rod cap.

      ST 18270AA020 SOCKET 

      G09480549Courtesy of SUBARU OF AMERICA, INC.
    3. Using the ST, turn the crankshaft counterclockwise and separate the positions of the #1 pin (A) of crankshaft and the large end (B) of #1 connecting rod.

      ST 18252AA000 CRANKSHAFT SOCKET 

      G09480550Courtesy of SUBARU OF AMERICA, INC.
    4. Push the #1 connecting rod in the direction of the arrow, and remove the #1 piston with #1 connecting rod from the cylinder block.
      G09480551Courtesy of SUBARU OF AMERICA, INC.
    5. Turn the crankshaft so that the #3 connecting rod cap (A) is located at the position shown in the figure using ST.

      ST 18252AA000 CRANKSHAFT SOCKET 

      G09480552Courtesy of SUBARU OF AMERICA, INC.
    6. Using ST, loosen the #3 connecting rod cap bolt, and remove the #3 connecting rod cap bolt and #3 connecting rod cap.

      ST 18270AA020 SOCKET 

      G09480553Courtesy of SUBARU OF AMERICA, INC.
    7. Using the ST, turn the crankshaft counterclockwise and separate the positions of the #3 pin (A) of crankshaft and the large end (B) of #3 connecting rod.

      ST 18252AA000 CRANKSHAFT SOCKET 

      G09480554Courtesy of SUBARU OF AMERICA, INC.
    8. Push the #3 connecting rod in the direction of the arrow, and remove the #3 piston with #3 connecting rod from the cylinder block.
    G09480555Courtesy of SUBARU OF AMERICA, INC.
  16. Set the part so that the cylinder block LH is on the upper side.
  17. Remove #2 and #4 connecting rod caps and pistons in the same removal procedure as #1 and #3 connecting rod caps and pistons.
  18. Set the part so that the cylinder block RH is on the upper side, and separate the cylinder block.
    1. Remove the engine stand from the cylinder block RH.
      G09480556Courtesy of SUBARU OF AMERICA, INC.
    2. Remove the bolt shown in the figure.
      G09480557Courtesy of SUBARU OF AMERICA, INC.
    3. Loosen the cylinder block mounting bolts in numerical order as shown in the figure.
      Fig 1: Cylinder Block Mounting Bolts With Loosening Sequence
      G09480558Courtesy of SUBARU OF AMERICA, INC.
    4. While tapping the cylinder block RH with a plastic hammer, separate the cylinder block RH from the cylinder block LH.
      NOTE: Lift the cylinder block RH gradually, and confirm that the crankshaft is remaining in the cylinder block LH. If the cylinder block RH is lifted carelessly when separating, the crankshaft may stick to cylinder block RH, then fall off.
  19. Remove the crankshaft from cylinder block LH, and remove the rear oil seal.
  20. Remove the O-ring from the cylinder block LH.
    G09480559Courtesy of SUBARU OF AMERICA, INC.
  21. Remove the crankshaft bearings from the cylinder block.
    NOTE:
    • Be careful not to confuse the crankshaft bearing combination.
    • Press the bearing at the end opposite to locking lip (A).
    G09480560Courtesy of SUBARU OF AMERICA, INC.
  22. Remove the liquid gasket from cylinder block.
  23. Remove the cylinder block LH from the engine stand.
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