Q: Brake lines have air, bled many times
My truck constantly gets air in the brake lines. They have been bled multiple times but the issue reoccurs. I had the master cylinder replaced. The system is pressure tested as well. There are no leaks. What might be wrong?
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Hello. Moisture in the brake fluid is being boiled off as steam when your brake system temperature gets above 212 degrees (at sea level). The steam re-condenses as water in the system BUT air pockets can be created and remain inside. You might need to bleed the system with new fluid quite a few times to be sure all moisture is removed. Be sure to keep fluid level in the reservoir is at "full" level when done.
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