2021 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE

Engine Starting System & Charging System (2.0L): Generator: Assembly

Assemble in the reverse order of disassembly.

NOTE:
  1. Assembling the rear cover and rectifier

    Remove old silicone grease on the mating surface of rear cover and rectifier and apply new silicone grease.

    CAUTION: Do not apply silicone grease to the attachment threads of rectifier.
  2. Push of the brush

    Before assembling the front and rear parts, press the brush down into the brush holder, then fix the brush in that position by inserting a [1 mm (0.0394 in) dia., 40 - 50 mm (1.5748 - 1.9685 in) long] wire through the hole as shown in the figure.

    CAUTION: After assembling, remove the wire.
    G12443099Courtesy of SUBARU OF AMERICA, INC.
  3. Install the ball bearings.
    1. Set the ball bearings in the front cover, then securely install an appropriate tool (such as a socket wrench of proper size) to the bearing outer race.
    2. Using a press to press the ball bearings into the specified location.
    3. Install the bearing retainer.
  4. Install the bearings.
    CAUTION: Do not apply grease to the bearings. If there is any oil on the bearing box, remove it completely.
    1. Use a press to install the bearings to the rotor shaft.
    2. Heat the bearing box in rear cover at 50 to 60Β°C (122 to 140Β°F), and then press the bearing into rear cover.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.