What is the outcome of accidentally adding two tablespoons of power steering fluid to the brake fluid reservoir?

Asked by Oct 04, 2016 at 12:33 PM about the 2006 Dodge Caravan

Question type: Maintenance & Repair

Accidentally added about 2 tablespoons of power steering fluid, Lucas stop
leak to brake fluid reservoir.  Do I need to drain and refill the system?

3 Answers

23,845

Drain and refill it. Brake fluid has high compressibility, power steering fluid does not. If you haven't used the brakes at all, you can just drain the master cylinder and refill. If you've already used the brakes, may need to bleed then refill.

2 out of 2 people think this is helpful.
1,185

Good call KenF. Brake fluid has certain specifications that make it unique. Contamination concerns is another factor that support flushing the system. Please click on "Mark helpful" if you're happy with the respond. Good luck :-)

1 out of 1 people think this is helpful.
44,515

Fluids are not compressible. My concern would be what the Lucas crap does to the seals in the master cylinder and the rest of the system. I would get the brake fluid drained and refilled. If you haven't driven the car you could use a turkey baster or similar and remove all the brake fluid from the master cylinder and refill. I would still flush the brake system to be sure all the contaminating fluid is out of the system.

1 out of 1 people think this is helpful.

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