Impreza WRX STI F4-2.5L Turbo (2008)
SERVICE LIMIT
Make a measurements as follows. If it exceeds the service limit, replace with a new part.
CAUTION:
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When securing the oil pump on a vise, hold the oil pump with the least possible force between two pieces of wood.
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Do not grip the exterior of the flow control valve or pulley on a vise; as this can deform the exterior of the valve or pulley. Select properly
sized wood pieces.
1) Play of the pulley shaft
Condition:
P: When applying the force of 9.8 N (1.0 kgf, 2.2 lbf)
Service limit. Play in the radial direction (Direction <=> 0.4 mm (0.016 in) or less
Axial play (Direction <> 0.9 mm (0.035 in) or less
2) Deflection of the pulley groove
Service limit: 1.0 mm (0.039 in) or less
NOTE: Read the value for one surface of V ditch, and then the value for another off the dial gauge.