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2018
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WRX STI
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Repair and Diagnosis
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Transmission
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M/T Clutch System
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Master Cylinder
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Disassembly
Master Cylinder: Disassembly
Remove the straight pin and nipple.
Remove the oil seal.
Move the seat towards the rear.
Remove the piston stop ring.
CAUTION:
When removing the piston stop ring, be careful to prevent the rod, washer, piston and return spring from popping out.