Service Limit

WARNING: This page is about a different car, the 2004 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.

Make a measurement as follows. If it exceeds the specified service limit, replace the parts with new ones.

CAUTION:

Fix the oil pump on a vise to make a measurement. At this time, hold the oil pump with least possible force between two wood pieces.
Do not set outside of flow control valve or pulley on a vise; otherwise outside or pulley might be deformed. Select properly sized wood pieces.

Play of the pulley shaft
Condition:

P: When applying the force of 9.8 N (1.0 kgf, 2.2 lb)

Service limit:

Radial play (Direction <-- -->)

0.4 mm (0.016 in) or less

Fig 1: Checking Pulley Shaft Radial Play
Courtesy of SUBARU OF AMERICA, INC.

Axial play (Direction <-- --> )

0.9 mm (0.035 in) or less

Fig 2: Checking Pulley Shaft Axial Play
Courtesy of SUBARU OF AMERICA, INC.
Ditch deflection of pulley
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.

Fig 3: Measuring Deflection Of Pulley
Courtesy of SUBARU OF AMERICA, INC.
Resistance to rotation of pulley

Service limit:

Maximum load; 9.22 N (0.94 kgf, 2.07 lb) or less

NOTE:

A rather higher value may be indicated when pulley starts turning.
Measure the load during rotation and make a judgment.

Fig 4: Measuring Resistance To Rotation Of Pulley

Courtesy of SUBARU OF AMERICA, INC.