Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2021 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE
STI Model
- Press in a new pilot bearing to the position where it is flush with the flywheel surface or up to 0.4 mm (0.016 in) deeper than that.CAUTION: Do not press the bearing inner ring.
- Install the flywheel and ST.
ST 498497100 CRANKSHAFT STOPPER - Tighten the flywheel mounting bolts to the specified torque.NOTE: Tighten the flywheel attachment bolts gradually. Each bolt should be tightened to the specified torque in a crisscross order.
Tightening torque:
75 N.m (7.6 kgf-m, 55.3 ft-lb)
- Install the clutch disc and clutch cover. Refer to CLUTCH SYSTEM>CLUTCH DISC AND COVER>INSTALLATION .
- Install the transmission assembly. Refer to MANUAL TRANSMISSION AND DIFFERENTIAL(6MT) (TY85)>MANUAL TRANSMISSION ASSEMBLY>INSTALLATION .
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.