ACDelco
ACDelco 18A2956A | Rear Disc Brake Rotor
ACDelco Silver (Advantage) Disc Brake Rotors are a quality, high value alternative for General Motors vehicles as well as most makes and models and are backed by General Motors. ACDelco Silver...
ABS Sensor Ring Included | No |
Bolt Circle Diameter (in) | 5.5 |
Bolt Circle Diameter (mm) | 139.7 |
Bolt Hole Quantity | 6 |
Center Bore Diameter (in) | 3.1 in |
Center Bore Diameter (mm) | 78.6 mm |
Construction | Full Cast |
Disc Finish | Turned |
FAQ - Answer 1 | No, but it is a good idea to inspect them for wear-out, cracking, leaking etc. |
FAQ - Answer 2 | No, but it is a good idea to inspect your brake rotors at each tire rotation. |
FAQ - Question 1 | Do I have to replace all my brake parts when replacing my brake rotors? |
FAQ - Question 2 | Do I have to replace my brake rotors after a certain amount of time? |
Good Maintenance Practices - Section 1 - Bullet 1 | Check brake fluid level at every oil change. Replace fluid according to owner's manual recommendations. |
Good Maintenance Practices - Section 1 - Bullet 2 | Calipers and wheel cylinders should be checked every brake inspection and serviced or replaced as required. |
Good Maintenance Practices - Section 1 - Bullet 3 | Inspect the brake lines for rust, punctures or visible leaks (You may be able to do this, but consult a qualified technician if necessary). |
Good Maintenance Practices - Section 1 - Bullet 4 | Check the thickness of your brake pads. |
Good Maintenance Practices - Section 1 - Header | The following inspections and maintenance procedures can help prevent potential brake problems: |
Good Maintenance Practices - Section 2 - Bullet 1 | Inspection of the brake hoses for brittleness or cracking. |
Good Maintenance Practices - Section 2 - Bullet 2 | Inspection of brake lining and pads for wear or contamination by brake fluid or grease. |
Good Maintenance Practices - Section 2 - Bullet 3 | Inspection of wheel bearings and grease seals. |
Good Maintenance Practices - Section 2 - Bullet 4 | Parking brake adjustments (as needed). |
Good Maintenance Practices - Section 2 - Header | The following should be conducted by a qualified technician: |
Grade Type | Performance |
Hat Finish | Turned |
Height (in) | 3.8 |
Height (mm) | 95.5 |
Length (in) | 14.1 |
Material | Cast Iron |
Overall Rotor Diameter (mm) | 330.2 mm |
Programming Required | No |
Rust Resistant Coating | Yes |
Signs of Wear & Troubleshooting - Section 1 - Bullet 1 | Visible ridges on rotor surface. |
Signs of Wear & Troubleshooting - Section 1 - Bullet 2 | Chirping, grinding, or squeaking noises when braking. |
Signs of Wear & Troubleshooting - Section 1 - Bullet 3 | Difficulty stopping the vehicle. |
Signs of Wear & Troubleshooting - Section 1 - Bullet 4 | A low or sinking brake pedal. |
Signs of Wear & Troubleshooting - Section 1 - Bullet 5 | Braking causes the pedal and/or steering wheel to pulsate/vibrate (not to be confused with normal ABS operation. |
Signs of Wear & Troubleshooting - Section 1 - Bullet 6 | Vehicle pulls to the left or right when brakes are applied. |
Signs of Wear & Troubleshooting - Section 1 - Header | Brake rotor signs of wear include: |
Slotted | Yes |
Solid Or Vented Type Rotor | Vented |
Surface Type | Smooth |
Weight (lb) | 22.9 |
Width (in) | 14.1 |