Small amount of coolant was put into the brake fluid

80,000 MILES
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SKENNYSEA
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  • 1 POST
I put a small amount of coolant in the brake fluid about a half a cup. will it effect the brakes?
Jul 30, 2019 at 7:32 PM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,244 POSTS
Welcome to 2CarPros.

Yes, that is a problem. If you used the vehicle since you did this, the system should be flushed and inspected by a trained individual. If it wasn't used and the brakes never applied after the mistake, remove everything from the master cylinder, wipe everything clean, and refill with brake fluid. I would still have it looked at for safety.

https://www.2carpros.com/articles/how-to-bleed-or-flush-a-car-brake-system

Let me know if you have other questions.

Joe
Jul 30, 2019 at 11:34 PM
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