ACDelco 177-1140 - Rear Disc Brake Rotor

Signs of Wear & Troubleshooting

• Brake rotor signs of wear include:
• Brake pedal pulsation (not to be confused with normal ABS operation).
• Squealing or grinding noises.
• Low brake pedal height.
• Vehicle pulls to the left or right when brakes are applied.
• Visible ridges or deep grooves on the rotor surface.

Good Maintenance Practices

• The following inspections and maintenance procedures can help prevent potential brake problems.
• Check brake fluid level at every oil change. Replace fluid according to owner's manual recommendations.
• Calipers and wheel cylinders should be checked every brake inspection and serviced or replaced as required.
• Inspect the brake lines for rust, punctures, or visible leaks (You may be able to do this, but consult a qualified technician if necessary).
• Check the thickness of your brake pads.

• The following should be conducted by a qualified technician:
• Inspection of the brake hoses for brittleness or cracking.
• Inspection of brake lining and pads for wear or contamination by brake fluid or grease.
• Inspection of wheel bearings and grease seals.
• Parking brake adjustments (as needed).