Dealing with rear brake sticking issues can be a frustrating and potentially dangerous problem for any vehicle owner. When the rear brakes stick, it can cause uneven wear on the brake pads, decreased braking performance, and even overheating of the brake system.
There are several common causes of rear brake sticking, including rust or debris buildup on the caliper piston, worn brake pads, or a malfunctioning brake caliper. It’s important to diagnose and address the issue promptly to ensure the safety and performance of your vehicle.
In this article, we will discuss some common solutions to rear brake sticking problems, such as cleaning and lubricating the caliper piston, replacing worn brake pads, and inspecting the brake caliper for any signs of damage. By following these steps, you can effectively resolve rear brake sticking issues and restore the proper function of your vehicle’s braking system.
Identifying Symptoms of Rear Brake Sticking
1. Spongy or soft brake pedal that requires extra effort to stop.
2. Unusual noises, such as grinding or squeaking, when applying the brakes.
3. Unusual smell, like burning rubber, coming from the rear brakes.
4. Uneven wear on the rear brake pads or discs.
5. The vehicle pulls to one side when braking.
6. Reduced braking performance or longer stopping distances.
Checking Brake Fluid Levels
One common cause of rear brake sticking issues is low brake fluid levels. It is important to regularly check the brake fluid level to ensure proper functioning of the rear brakes.
How to Check Brake Fluid Levels:
1. Locate the brake fluid reservoir under the hood of your vehicle.
2. Remove the cap of the reservoir and inspect the fluid level. It should be between the minimum and maximum marks on the reservoir.
3. If the fluid level is low, top it up with the appropriate type of brake fluid recommended by the manufacturer.
4. Check for any leaks in the brake system that may be causing the fluid level to drop.
5. If the fluid level continues to drop after topping it up, it may indicate a more serious issue with the brakes that requires professional inspection.
Inspecting Rear Brake Calipers
When troubleshooting rear brake sticking issues, it is essential to inspect the rear brake calipers thoroughly. Here are the steps to follow:
Step 1: Visual Inspection
Start by visually inspecting the rear brake calipers for any signs of damage, corrosion, or leaking brake fluid. Check for any visible wear on the caliper housing and pistons.
Step 2: Check for Sticking Pistons
Next, check the caliper pistons for any signs of sticking. Gently push each piston back into its bore using a C-clamp, and observe if it moves freely. Any resistance or difficulty in movement indicates a sticking piston.
If you notice any issues during the inspection, it is crucial to address them promptly to prevent further damage and ensure the proper functioning of your rear brakes.
Examining Brake Pads and Rotors
When dealing with rear brake sticking issues, it’s essential to thoroughly examine both the brake pads and rotors. These components play a crucial role in the braking system and can be the source of the problem.
Brake Pads
- Inspect the brake pads for excessive wear. If they are worn down beyond a certain point, they may not be able to function properly, causing them to stick.
- Check for any signs of uneven wear or damage on the brake pads. This can indicate issues with the brake calipers or other parts of the braking system.
- Make sure the brake pads are properly lubricated. Lack of lubrication can lead to friction and sticking.
Rotors
- Examine the rotors for any signs of warping or damage. Warped rotors can cause the brakes to stick and affect the overall performance of the braking system.
- Ensure that the rotors are properly aligned and seated correctly. Misalignment can lead to sticking issues and potential safety hazards.
- Clean the rotors thoroughly to remove any debris or buildup that may be causing the brakes to stick. Regular maintenance is key to preventing sticking problems.
Cleaning and Lubricating Brake Components
Regular cleaning and lubrication of brake components is essential for preventing rear brake sticking issues. Here are the steps you can follow:
Step 1: Remove the Rear Wheel
Start by removing the rear wheel to gain access to the brake components. This will allow you to inspect and clean all parts thoroughly.
Step 2: Clean the Brake Caliper and Pads
Use a brake cleaner spray to remove any built-up dirt, grime, and brake dust from the brake caliper and pads. Make sure to clean both the inside and outside of the caliper.
| Component | Cleaning Method |
|---|---|
| Brake Caliper | Use a wire brush and brake cleaner spray |
| Brake Pads | Replace if worn out, otherwise clean with brake cleaner spray |
Once clean, apply a thin layer of high-temperature brake grease to the caliper bolts and slider pins to ensure smooth movement.
By following these steps regularly, you can maintain your rear brake components in optimal condition and prevent sticking issues.
Adjusting Parking Brake Cable Tension
To adjust the parking brake cable tension, follow these steps:
1. Lift the Vehicle
Jack up the rear of the vehicle and secure it on jack stands to access the rear brake assembly.
2. Locate the Parking Brake Cable Adjuster
| Vehicle Type | Location of Adjuster |
|---|---|
| Drum brakes | Located near the rear brake assembly |
| Disc brakes | Located under the center console or near the parking brake lever |
Once you locate the adjuster, use a wrench to turn it either clockwise to tighten or counterclockwise to loosen the cable tension.
Replacing Rear Brake Calipers
To replace rear brake calipers, follow these steps:
1. Raise the vehicle and secure it on jack stands.
2. Remove the wheels and locate the rear brake calipers.
3. Disconnect the brake line from the caliper and remove the caliper mounting bolts.
4. Take out the old caliper and install the new one in its place.
5. Reattach the caliper mounting bolts and connect the brake line.
6. Bleed the brake system to remove air bubbles.
7. Reinstall the wheels and lower the vehicle.
8. Test the brakes to ensure they are working properly.
Flushing Brake Fluid System
Flushing the brake fluid system is an essential maintenance task that can help solve rear brake sticking issues. Over time, brake fluid can become contaminated with moisture, dirt, and debris, which can lead to corrosion and sticking brakes. Flushing the system involves draining the old fluid and replacing it with fresh, clean fluid.
To flush the brake fluid system, start by lifting the vehicle and removing the wheels. Locate the brake bleeder valves on the rear calipers and attach a clear plastic hose to the valve. Open the valve and have a helper press the brake pedal to push out the old fluid. Repeat this process until clean fluid runs through the hose.
Once the fluid is clean, top off the master cylinder with fresh brake fluid and bleed the brakes to remove any air bubbles. Make sure to use the manufacturer-recommended brake fluid for your vehicle. Flushing the brake fluid system regularly can help prevent rear brake sticking issues and ensure your brakes function properly.
Testing Rear Brakes for Proper Functioning
1. Visual Inspection:
Start by visually inspecting the rear brake components, including the brake pads, calipers, rotors, and brake lines. Look for any signs of wear, damage, or leakage.
Check the brake pads for thickness, the rotors for scoring or warping, and the brake lines for any leaks or kinks.
2. Brake Pad Test:
Perform a brake pad test by applying the rear brakes while driving at a slow speed. Listen for any unusual noises, such as squealing or grinding, which could indicate worn brake pads.
Pay attention to how the rear brakes feel – if they are not responsive or feel spongy, it could be a sign of sticking brakes.
- Apply gentle pressure to the brake pedal
- Listen for any unusual noises
- Check for responsiveness and pedal feel
Preventing Rear Brake Sticking Issues in the Future
1. Regularly inspect and clean the rear brake caliper and brake pad surfaces to prevent debris buildup that can cause sticking.
2. Ensure that the brake fluid is changed according to the manufacturer’s recommendations to maintain proper brake function.
3. Lubricate the brake caliper sliding pins and contact points to prevent them from seizing up and causing the brakes to stick.
4. Check the brake hoses for any signs of wear or damage, as this can lead to brake fluid leaks and subsequent sticking of the rear brakes.
5. Avoid riding the brakes excessively, as this can lead to overheating and sticking of the rear brakes.
6. Properly adjust the rear brake pedal to ensure that it returns to its original position after being depressed, preventing any potential sticking issues.
7. If you notice any unusual noises or sensations while braking, have the rear brakes inspected by a professional mechanic to address any potential issues before they escalate.