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Why is there always air in the brake system of Baojun 730?

2 Answers

McTeagan

07/24/25 4:26am

The main reasons for air entering the brake pump are: the brake fluid contains too much water, which can easily generate air in the fluid. Air enters the brake system during brake pump maintenance. Hazards of air in the brake pump: Air in the brake pump has a significant impact on the vehicle's braking system. Since air is compressible, if the air is not expelled from the brake system, it will not function properly for braking. Solutions for air in the brake system: Pump the brake pedal several times to build sufficient hydraulic pressure in the system, then loosen the bleeder screw on the wheel cylinder (located at the top of the brake disc). At this point, brake fluid will flow out from the bleeder screw. Do not release the brake pedal until the bleeder screw is tightened. After tightening the bleeder screw, release the brake pedal and repeat the process to pressurize the system.

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HoldenRose

08/11/25 12:03am

I've driven quite a few cars, and the persistent air in the Baojun 730's brakes is indeed a headache. This issue is likely related to the braking system. If the brake fluid is insufficient or leaking, it's easy for air bubbles to mix in, causing the brake pedal to feel soft, as if stepping on cotton. The cause often lies in minor leaks in the master cylinder, wheel cylinder, or brake lines, with aging seals being the most common culprit. Failing to fully bleed the system after replacing the brake fluid can also leave residual air. If not fixed properly the first time, the problem tends to recur. A friend of mine had the same issue and frequently needed to pump the brakes to bleed the air or top up the brake fluid. I recommend going to a repair shop immediately for a check-up. Use professional tools to bleed the air, and replace any worn parts if necessary. Otherwise, prolonged poor braking performance can be very dangerous, especially at high speeds. Addressing it promptly will give you peace of mind. This fault is quite common, especially in older cars or those not maintained regularly.

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