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Home › Subaru › 2023 › BRZ Premium, Automatic Trans › Repair and Diagnosis › Engine Mechanical › Mechanical › Engine Mechanical System › Engine Assembly › Installation

Engine Assembly: Installation

  1. Using the ST1, install the ST2 to the engine unit.

    Preparation tool: 

    ST1: BOLT (90119-14120)

    ST2: ENGINE HANGER NO. 1 (12281-38150)

    Tightening torque: 

    43 N.m (4.4 kgf-m, 31.7 ft-lb)

    G16523761Courtesy of SUBARU OF AMERICA, INC.
  2. Support the engine unit with a lifting device and wire ropes, and remove the engine unit from the engine stand, etc.
  3. Install the engine mounting onto the engine unit.

    Tightening torque: 

    35 N.m (3.6 kgf-m, 25.8 ft-lb)

  4. Apply a small amount of grease to splines of main shaft. (MT model)

    Preparation items: 

    Grease: NICHIMOLY N-130 or equivalent

  5. Place the engine unit in engine compartment and align it with transmission body. (AT model)
    NOTE:
    • Be careful not to damage adjacent parts or body panels with crank pulley, oil level gauge, etc.
    • If it is hard to insert the knock pin on the engine unit into the transmission body, precisely adjust the height of the transmission body with garage jack so that no load is applied to the knock pin.
  6. Position the engine unit in engine compartment, insert the clutch disc into the main shaft, and align it with the transmission body. (MT model)
    NOTE:
    • Be careful not to damage adjacent parts or body panels with crank pulley, oil level gauge, etc.
    • If it is hard to insert the clutch disc into the main shaft, insert the wrench into the crank pulley bolt, and rotate the crank pulley slightly to insert it.
    • If it is hard to insert the knock pin on the engine unit into the transmission body, precisely adjust the height of the transmission body with garage jack so that no load is applied to the knock pin.
  7. With a lifting device and a garage jack, slowly lower the engine unit together with the transmission body.
    NOTE: Check that the stud bolt of the engine mounting is securely inserted into the engine mounting hole of the crossmember COMPL front.
  8. Temporarily tighten the bolt (1 location) which holds the transmission body to the engine unit as shown in the figure.
    • AT model
      G16523765Courtesy of SUBARU OF AMERICA, INC.
    • MT model
    G16523766Courtesy of SUBARU OF AMERICA, INC.
  9. Remove the garage jack.
  10. Remove the lifting device and wire ropes.
  11. Remove the ST1 and ST2 from the engine unit.
    G16523761Courtesy of SUBARU OF AMERICA, INC.
  12. Connect the fuel delivery tube and evaporation hose.
    1. Connect the quick connector on the fuel delivery tube (port injection side) (A) to the fuel pipe LH, and connect the quick connector on the fuel delivery tube (cylinder direct injection side) (B) to the fuel delivery pipe assembly.
      CAUTION:
      • Check that there is no damage or dust on the quick connector. If necessary, clean the seal surface of the pipe.
      • When connecting the quick connector, make sure to insert it all the way in before locking the slider.
      • When it is difficult to lock the slider, check that the connector is fully inserted.
      • After locking the slider, pull the quick connector itself to the disconnecting direction, and then push to the connecting direction in order to confirm secure connection. Always make sure to perform this confirmation ending up with a pushing in.
      NOTE: Connect the quick connector as shown in the figure.
      G16523718Courtesy of SUBARU OF AMERICA, INC.
      (a) Slider
    2. Install the fuel delivery tube (port injection side) (A) and fuel delivery tube (cylinder direct injection side) (B) to the fuel delivery tube clamp.
    3. Connect the evaporation hose (C) to the vacuum pipe.
    G16523773Courtesy of SUBARU OF AMERICA, INC.
  13. Lift up the vehicle.
  14. Remove the ST from the transmission body. (AT model)
    1. Remove the ST from the transmission body.
      G16523753Courtesy of SUBARU OF AMERICA, INC.
    2. Install cover to the converter case.

      Tightening torque: 

      7.4 N.m (0.8 kgf-m, 5.5 ft-lb)

      G16523751Courtesy of SUBARU OF AMERICA, INC.
    3. Install the stabilizer front and the sub frame COMPL. Ref. to FRONT SUSPENSION>STABILIZER>INSTALLATION .
  15. Install the bolts (3 locations) and nuts (2 locations) which hold the transmission body to the engine unit as shown in the figure.
    NOTE: For the MT model, install the cover plate (a) together with the bolts.

    Tightening torque: 

    50 N.m (5.1 kgf-m, 36.9 ft-lb)

    • AT model
      G16523749Courtesy of SUBARU OF AMERICA, INC.
    • MT model
    G16523750Courtesy of SUBARU OF AMERICA, INC.
  16. Install the nuts which hold the engine mounting to the crossmember COMPL front.
    CAUTION: Be sure to use a new nut
    NOTE: Make sure that locators (a) of the engine mounting are securely inserted.

    Tightening torque: 

    90 N.m (9.2 kgf-m, 66.4 ft-lb)

    G16523778Courtesy of SUBARU OF AMERICA, INC.
  17. Install the ground cord RH (A) together with the rear oxygen sensor bracket to the engine unit and connect the ground cord LH (B).

    Tightening torque: 

    T1: 9.5 N.m (1.0 kgf-m, 7.0 ft-lb)

    T2: 7.5 N.m (0.8 kgf-m, 5.5 ft-lb)

    Fig 1: Ground Cord RH And LH Bolts With Torque Specification
    G16523779Courtesy of SUBARU OF AMERICA, INC.
  18. Connect the radiator outlet hose to the engine unit.
    G16523746Courtesy of SUBARU OF AMERICA, INC.
  19. Install the sub frame front LWR C COMPL LH. Ref. to FRONT SUSPENSION>SUB FRAME>INSTALLATION .
  20. Install the front exhaust pipe. Ref. to EXHAUST (H4DO)>FRONT EXHAUST PIPE>INSTALLATION .
  21. Tighten the bolt which holds the transmission body to the engine unit as shown in the figure.

    Tightening torque: 

    50 N.m (5.1 kgf-m, 36.9 ft-lb)

    • AT model
      G16523765Courtesy of SUBARU OF AMERICA, INC.
    • MT model
    G16523766Courtesy of SUBARU OF AMERICA, INC.
  22. Install the torque converter to drive plate. (AT model)
    1. Remove the ST from converter case.
      G16523758Courtesy of SUBARU OF AMERICA, INC.
    2. Insert the wrench into the crank pulley bolt, and rotate the crank pulley to attach the bolts (6 places) securing the torque converter to the drive plate.
      NOTE: Be careful not to drop bolts into the converter housing.

      Tightening torque: 

      25 N.m (2.5 kgf-m, 18.4 ft-lb)

      G16523757Courtesy of SUBARU OF AMERICA, INC.
    3. Fit the plug to service hole.
      G16523756Courtesy of SUBARU OF AMERICA, INC.
    4. Install the PCV hose No. 1. Ref. to EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES) (H4DO)>PCV HOSE>INSTALLATION>PCV HOSE NO. 1 .
  23. Secure the engine wiring harness to the vehicle with the clip.
    G16523755Courtesy of SUBARU OF AMERICA, INC.
  24. Set the battery cable assembly, and secure the battery cable assembly to the engine rear hanger with clip (C).
  25. Secure the battery cable assembly to the intake manifold assembly with clip (B), and connect the connector (A) to the engine rear hanger.
    G16523754Courtesy of SUBARU OF AMERICA, INC.
  26. Install the starter. Ref. to STARTING/CHARGING SYSTEMS (H4DO)>STARTER>INSTALLATION .
  27. Connect the water hose (A) and the water hose (B) to the oil cooler pipe and the water pipe. (AT model)
    G16523745Courtesy of SUBARU OF AMERICA, INC.
  28. Connect the heater inlet hose (A) and the heater outlet hose (B) to the water tank pipe assembly and the water pipe.
    G16523744Courtesy of SUBARU OF AMERICA, INC.
  29. Connect the hose pressure discharge to the A/C compressor. Ref. to AIR CONDITIONER>HOSE AND PIPE>INSTALLATION .
  30. Install the hose pressure suction. Ref. to AIR CONDITIONER>HOSE AND PIPE>INSTALLATION .
  31. Set the generator cord, and secure the generator cord to the fuel pipe protector RH No. 1 using clip (C).
  32. Connect the connector (A) and terminal (B) to the generator.

    Tightening torque: 

    15.5 N.m (1.6 kgf-m, 11.4 ft-lb)

    G16523742Courtesy of SUBARU OF AMERICA, INC.
  33. Install the brake vacuum hose & pipe. Ref. to BRAKE>BRAKE VACUUM PUMP>INSTALLATION>BRAKE VACUUM HOSE & PIPE .
  34. Install the strut tower bar. Ref. to FRONT SUSPENSION>STRUT TOWER BAR>INSTALLATION .
  35. Install the collector cover. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>COLLECTOR COVER>INSTALLATION .
  36. Install the ECM. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>ENGINE CONTROL MODULE (ECM)>INSTALLATION .
  37. Attach the radiator inlet hose. Ref. to COOLING (H4DO)>RADIATOR HOSE>INSTALLATION>RADIATOR INLET HOSE .
  38. Install the air intake boot. Ref. to INTAKE (INDUCTION) (H4DO)>AIR INTAKE BOOT>INSTALLATION .
  39. Install the air cleaner case. Ref. to INTAKE (INDUCTION) (H4DO)>AIR CLEANER CASE>INSTALLATION .
  40. Connect the ground terminal to the battery sensor. Ref. to REPAIR CONTENTS>NOTE>BATTERY .
  41. Install the fuel filler cap, and close the fuel filler lid.
  42. Fill engine coolant. Ref. to COOLING (H4DO)>ENGINE COOLANT>REPLACEMENT>FILLING OF ENGINE COOLANT
  43. Set the panel COMPL front hood to the normal position. Ref. to REPAIR CONTENTS>NOTE>STAY ASSEMBLY FRONT HOOD .
  44. Check the select lever and adjust it if necessary. (AT model)

    Inspection: 

    Ref. to CONTROL SYSTEMS>SELECT LEVER>INSPECTION .

    Adjustment: 

    Ref. to CONTROL SYSTEMS>SELECT LEVER>ADJUSTMENT .

    NOTE: This procedure is required because the select lever may be deviated from the adjusted position due to installation/removal of the nut on the engine mounting.
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