Auto >> AutoSPT >  >> Auto Repair

How do you repair the brakes on a car or van?

Repairing brakes is a complex and potentially dangerous job that should only be attempted by someone with the proper training, tools, and experience. Improper brake repair can lead to serious injury or death. If you are not experienced in automotive repair, take your vehicle to a qualified mechanic.

However, if you are experienced and understand the risks involved, here's a general overview of the process. This is *not* a comprehensive guide and should not be considered a substitute for professional training. Always consult a repair manual specific to your vehicle's make and model.

General Steps (Vary significantly depending on the specific brake system):

1. Safety First: Engage the parking brake firmly. Use jack stands to securely lift the vehicle, never rely solely on a jack. Wear safety glasses and gloves.

2. Diagnosis: Determine the exact problem. This might involve:

* Inspecting brake pads and rotors/drums: Check for wear, scoring, cracks, or glazing.

* Checking brake fluid level: Low fluid indicates a leak.

* Testing brake lines and hoses: Look for leaks, bulges, or cracks.

* Bleeding the brakes: Air in the brake lines can cause spongy brakes.

* Inspecting the master cylinder: Check for leaks or damage.

* Checking calipers and wheel cylinders: Look for leaks or sticking pistons.

* Inspecting the brake booster: Check for vacuum leaks or damage (usually requires professional tools and expertise).

3. Component Replacement (Examples): This will vary greatly based on the problem.

* Replacing brake pads: This usually involves removing the caliper, compressing the piston, replacing the pads, and reassembling.

* Replacing brake rotors/drums: This requires removing the wheel, caliper, and rotor/drum, then installing the new parts. Rotors often need to be machined or replaced if severely scored.

* Replacing brake lines/hoses: This requires careful bleeding of the system afterwards.

* Replacing calipers/wheel cylinders: These require careful bleeding after replacement.

* Replacing the master cylinder: This is a more advanced repair requiring significant experience.

4. Bleeding the Brakes: After any repair involving opening the brake system (e.g., replacing lines, calipers, or master cylinder), air needs to be bled from the system. This is typically done using a bleeder screw on each caliper or wheel cylinder, and a helper to pump the brake pedal.

5. Testing: After completing the repair, test the brakes thoroughly in a safe, controlled environment. Check for pedal feel, stopping distance, and any unusual noises. If anything feels wrong, do not drive the vehicle.

Specific Tools Needed (This is not exhaustive):

* Jack and jack stands

* Wheel chocks

* Wrenches (various sizes)

* Socket set

* Torque wrench

* Brake caliper piston compressor

* Brake fluid

* Bleeder wrench

* C-clamp (potentially)

* Safety glasses

* Gloves

* Repair manual specific to your vehicle

Again, this is a highly simplified overview. Brake repair is complicated and potentially dangerous. Improperly repaired brakes can lead to serious injury or death. If you are not experienced in automotive repair, take your vehicle to a qualified mechanic.