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.
Power Steering Vane Pump: Inspection
- Measure oil clearance between vane pump shaft and bushing:
Using a micrometer and caliper gauge, measure the oil clearance.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Standard clearance: 0.03-0.05 mm (0.0012-0.0020 in.).
If it is more than the maximum, replace the front housing and vane pump shaft.
- Inspect vane pump rotor and vane plates:
- Using a micrometer, measure the height, thickness and length of the vane plates.
Minimum height: 8.6 mm (0.339 in.).
Minimum thickness: 1.397 mm (0.0550 in.).
Minimum length: 14.991 mm (0.5902 in.).
- Using a micrometer, measure the height, thickness and length of the vane plates.
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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.