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Home >> Subaru >> 2021 >> WRX Base >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical System (2.0L) >> Crank Pulley >> Installation

Crank Pulley: Installation

  1. Degrease the press-fit section for the chain cover front oil seal, and install the front oil seal to the chain cover using ST.
    CAUTION: Do not apply fluid such as engine oil to the front oil seal and the chain cover; otherwise engine oil leakage may occur.
    NOTE:
    • Use a new front oil seal.
    • When tapping the front oil seal in on the vehicle, protect the radiator fin with cardboards etc. so as not to damage the radiator fin by the plastic hammer.
    ST  41399FG020  SPECIAL TOOL B 

    Front oil seal press-fit position: 

    1+0-1 mm (0.0394+0-0.0394 in) position from chain cover end face

    G13641712Courtesy of SUBARU OF AMERICA, INC.
  2. Clean the crankshaft thread using compressed air.
  3. Apply engine oil to the crank pulley bolt seat and thread.
  4. Install the crank pulley.
    1. Use a marker to add lines at the portion of the crank pulley bolt head that has no indented line, as shown in the figure.
      NOTE:
      • Four lines are indented by 90° on the crank pulley bolt head.
      • To minimize an angular error, use a ruler, etc. to draw a straight line.
      G13641713Courtesy of SUBARU OF AMERICA, INC.
    2. Set the crank pulley to the chain cover.
    3. Use the ST to lock the crank pulley, and temporarily tighten the crank pulley bolt.
      NOTE: To prevent damaging ST1, attach the ST2 onto the ST1 as shown.
      ST1  18355AA000  PULLEY WRENCH 
      ST2  18334AA000  PULLEY WRENCH PIN SET 
      G08316897Courtesy of SUBARU OF AMERICA, INC.
      ST1  18355AA000  PULLEY WRENCH 
      ST2  18334AA000  PULLEY WRENCH PIN SET 

      Tightening torque: 

      20 N.m (2.0 kgf-m, 14.8 ft-lb)

      G13259032Courtesy of SUBARU OF AMERICA, INC.
    4. Draw reference lines (A) and (B) using a marker to set the socket to the crank pulley bolt as shown in the figure.
      NOTE: Use a 6-point socket to tighten the crank pulley bolt to avoid the socket being broken.
      G13641716Courtesy of SUBARU OF AMERICA, INC.
    5. As shown in the figure, use a marker with a different color than in step (1) to draw a reference line (C) on the crank pulley bolt, according to the reference line (A) and the indented line or additional line on the crank pulley bolt head. Then draw a end line (D) on the crank pulley, using the reference line (B) and the indented line or additional line on the crank pulley bolt head as a reference.
      NOTE: Reference line (C) is drawn for prevention of misidentification and better visibility.
      G13259034Courtesy of SUBARU OF AMERICA, INC.
    6. Use the ST to lock the crank pulley, and tighten the crank pulley bolt to the angle where reference line (C) and end line (D) are aligned.
      NOTE: It should be approx. 120° when reference line (C) and end line (D) are aligned.
      ST1  18355AA000  PULLEY WRENCH 
      ST2  18334AA000  PULLEY WRENCH PIN SET 

      Tightening angle: 

      120°±5°

      G13259035Courtesy of SUBARU OF AMERICA, INC.
  5. Install the V-belts. Refer to MECHANICAL(W/O STI)>V-BELT>INSTALLATION>V-BELT .
  6. When working on the vehicle
    NOTE: When working on the vehicle, perform the following steps also.
    1. Install the radiator main fan & fan motor assembly and radiator sub fan & fan motor assembly. Refer to COOLING(W/O STI)>RADIATOR MAIN FAN AND FAN MOTOR>INSTALLATION . Refer to COOLING(W/O STI)>RADIATOR SUB FAN AND FAN MOTOR>INSTALLATION .
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