How to Adjust Loose Disc Brakes?

2 Answers
VonPaislee
07/24/25 5:03am
Disc brakes that are too loose can be adjusted as follows: 1. Have a professional perform fine adjustments to the brakes; you can also adjust the position and travel of the brake pedal, and ensure sufficient brake fluid is added to maintain braking force. Generally, replacing the old brake fluid with new one can restore the original braking feel if the car's disc brakes are too loose. 2. Disc brakes consist of a brake disc connected to the wheel and a brake caliper at the edge of the disc. When braking, high-pressure brake fluid pushes the brake pads to clamp the disc, thereby generating the braking effect. 3. Disc brakes are sometimes referred to as rotor brakes, and they come in two types: standard disc brakes and ventilated disc brakes.
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SanKira
08/11/25 12:42am
A few days ago, the disc brakes on my car also became loose, and the brake pedal felt spongy, which made me worried while driving. Here’s how I adjusted it: First, check the brake pad wear by measuring the thickness with an old ruler—if it’s below 3mm, replace the pads. Next, inspect the brake fluid reservoir; if the fluid level is too low or there are bubbles, you’ll need to bleed the brakes. Bleeding requires a helper—one person pumps the brake pedal while the other loosens the bleeder valve on the wheel, repeating the process until the air bubbles are gone, then topping up with fresh fluid. The caliper also has an adjustment screw; tightening it slightly can reduce the gap, but don’t over-tighten to avoid damage. Safety first—finally, test-drive to see if the braking force improves. If not, it’s best to consult a professional mechanic, as tampering with the braking system carries high risks.
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