Power Steering Fluid Flush and Fill
Easy step by step guide on how to flush and refill an automotive power steering system, this articles pertains to most vehicles.
Difficulty Scale: 2 of 10
Tools and Supplies Needed
Power steering fluid that has broken down can cause the system to make a whining noise which can be corrected by a fluid flush. If the pump has been run for an extended period with degraded fluid, damage to the pump can be permanent in which case replacement is required. Visit - Power steering pump replacement
Best Practices
- Small wrench set
- Vacuum hose
- Brake fluid
- Protective clothing and gloves
- Shop towels
- Helper
- Always use protective gloves, clothing and eye-wear to guard against accidental spillage.
Start with the car on level ground, engine OFF, lifted safely using jack stands.
Step 1 - Locate the power steering reservoir and remove the cap.
Removing Power Steering Reservoir Cap
Step 2 - Next, remove the power steering system hose clamp. (Note: This is usually the smaller of the two hoses.)
Remove Return Line Clamp
Step 3 - Once the fluid return line is disconnected and a plug installed over the open fitting, attach a hose to the return line.
Installing Hose to Return Line
Step 4 - Then, refill the reservoir with fluid.
Refilling Power Steering Reservoir
Step 5 - While having a fluid catch basin ready, have a helper start the engine (idle). The system will pump fluid out while adding new power steering fluid into the reservoir.
Flushing Power Steering Fluid
Step 6 - Continue this until fresh fluid is present.
New Fluid
Step 7 - Once this operation is complete, reattach the return line to the reservoir and refill the system.
Refilling Reservoir
Step 8 - Install fluid until full as shown by the fluid level indicator, some are located inside the reservoir, under the cap.
Fluid Level Indictor
Step 9 - Once the fluid is at its proper level, reinstall the reservoir cap.
Reinstalling Cap
After the job is complete, check for leaks. It is normal for the system to make a little noise while the air in the fluid dissipates, this can take up to a day to occur.
Removing Power Steering Reservoir Cap
Remove Return Line Clamp
Step 3 - Once the fluid return line is disconnected and a plug installed over the open fitting, attach a hose to the return line.
Installing Hose to Return Line
Refilling Power Steering Reservoir
Flushing Power Steering Fluid
New Fluid
Refilling Reservoir
Fluid Level Indictor
Reinstalling Cap
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