ACDELCO
More Information for ACDELCO 18A2812
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ACDELCO 18A2812  
$78.79
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ACDELCO 18A2812 Specifications
Abs Tone Ring IncludedNo
Bolt Circle Diameter (IN)6.4
Bolt Circle Diameter (MM)163
Center Bore Diameter (IN)5.5in
Center Bore Diameter (MM)139.4mm
Center Hole Diameter (IN)5.488
Center Hole Diameter (MM)139.4
ConstructionFull Cast
Conventional Or Drum-In-Hat Type RotorDrum-in-Hat
Disc FinishTurned
Discard Thickness (IN)1.472
Discard Thickness (MM)37.4
Hat FinishTurned
Height (IN)4.9
Height (MM)124.2
Inside Diameter (IN)10.622
Inside Diameter (MM)269.8
Length (IN)16.1
MaterialCast Iron
Mounting Bolt Hole Circle Diameter (IN)6.417
Mounting Bolt Hole Circle Diameter (MM)163
Mounting Bolt Hole Diameter (IN)0.507
Mounting Bolt Hole Diameter (MM)12.9
Nominal Thickness (IN)1.535
Nominal Thickness (MM)39
Outside Diameter (IN)15.354
Outside Diameter (MM)390
Overall Height (IN)4.89
Overall Height (MM)124.2
Overall Rotor Diameter (mm)390.14mm
Pad Contact Surface Width (IN)2.4
Pad Contact Surface Width (MM)60.1
Rust Resistant CoatingYes
SlottedNo
Solid Or Vented Type RotorVented
Surface TypeSmooth
Weight (lb)44.6
Width (IN)16.1
Gold / Professional; Fully Coated
ACDelco Gold (Professional) Rotors provide reliable vehicle braking power and are an ideal aftermarket replacement for your GM and non-GM vehicle. They feature a thickness variation that is less than 0.0004 to minimize pedal pulsation, noise, and help with brake pad life. These rotors meet the SAE standard for structural integrity with OE matched G3000 qualified material delivering guaranteed performance.

Features & Benefits:
  • Rust-preventative coating, applied to the rotor hat, edges and cooling vanes, provides corrosion protection for superior durability
  • Inspected for balance; helping with smooth brake operation and noise levels
  • Independently tested with Noise/Vibration/Harshness (NVH) and durability/wear testing; resulting in high quality and reliable rotors
  • Follows original manufacturers' designs for dispersing heat, helping to prolong pad and rotor life while also helping to minimize noise and vibration
  • Ready to be installed right out of the box – no machining required
Installation Tips
  • Always replace Brake Pads and inspect Calipers and Brake Hoses when installing new rotors
  • Suspend the caliper from the suspension using a Caliper Hanger to prevent damage to the brake hose
  • After removing the old rotor, clean the hub face with a Wire Brush to remove rust buildup and apply Copper Anti Seize to prevent future buildup. Rust or debris on the hub can cause rotor runout and lead to wheel vibration
  • Apply Brake Lube to caliper pins, clips, the edges of the brake pad mounting tabs, and the back side of the brake pads to ensure noise free braking. DO NOT apply lube to the friction side of the brake pads
  • Use a Caliper Piston Compressor to retract the caliper piston(s) and make room for the new, thicker brake pads
  • Open the master cylinder reservoir during piston compression to prevent pressure buildup. Keep an eye on the Brake Fluid level to ensure it does not overflow
  • After the job is complete, pump the brake pedal several times to push the caliper piston back up against the pads to ensure proper brake function


OEM / Interchange Numbers: 88878100

Closeout Inventory Warranty Information:
Wholesaler Closeout items have a 30 day warranty (but still are covered by our Return Policy).

Regular Inventory Warranty Information:
24 Month / Unlimited Mile Warranty
Warranty Details