LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Subaru >> 2016 >> WRX Base >> Repair and Diagnosis >> Steering >> Power Steering >> Power Steering System >> Oil Pump >> Inspection >> Basic Inspection
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Basic Inspection

Perform the following inspection procedures and replace faulty parts.

No. Parts Inspection Corrective action
1 Oil pump (exterior) (1) Crack, damage or oil leakage Replace the oil pump with a new part.
(2) Play of pulley shaft Measure the radial play and axial play. If any of these exceeds the service limit, replace the oil pump with a new part.
2 Pulley (1) Damage Replace the oil pump with a new part.
(2) Bend Measure the V groove deflection. If it exceeds the service limit, replace the oil pump with a new part.
3 Oil pump (interior) (1) Faulty or seized of vane pump Check the rotating resistance of pulley. If it exceeds the service limit, replace the oil pump with a new part.
(2) Bend in the shaft or damage to bearing If the a string is wrapped on the pulley and rotated, and the oil pump emits a noise that is markedly different in tone and loudness from a sound of a new oil pump, replace the oil pump with a new part.
4 O-ring Cracking or deterioration Replace with a new part.
5 Bracket Cracks Replace with a new part.