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  2. Auto Parts
  3. Brake System
  4. Brake Hydraulics
  5. Brake Master Cylinder
  6. ACDelco 18M232

ACDelco 18M232 Brake Master Cylinder

ACDelco 18M232 Brake Master Cylinder

ACDelco
Brand:ACDelco
Part Number: 18M232
UPC: 00036666697209
Weight: 3.97 lbs
Condition:New



Availability:
0 in Stock
 OUT OF STOCK

Product Information

Description:

MASTER CYL (B)

ACDelco Professional Brake Master Cylinders use both aluminum and iron castings, making them a high quality replacement for many vehicles on the road today. These master cylinders contain both Ethylene Propylene (EPDM) and Styrene Butadiene (SBR) rubber components to provide superior resistance to heat, corrosion, and leakage. ACDelco Professional Brake Master Cylinders are ready to bench bleed and install right out of the box - no assembly required. These premium aftermarket replacement brake master cylinders are manufactured to meet your expectations for fit, form, and function. WARNING: Cancer and Reproductive Harm - https://www.P65Warnings.ca.gov

Brakes are one area in which vehicle owners simply cannot compromise. With ACDelco Brakes, they can get the peace of mind that comes with parts that are expertly engineered, manufactured to stringent tolerances, thoroughly tested and backed by the ACDelco name. Choose from our GM Original Equipment, Professional, Advantage, and Specialty Series brake products to meet your performance needs and budget. For your GM and non-GM vehicles, trust ACDelco rotors, pads, drums, and other brake components to help keep you and your loved ones safe.

ACDelco Professional, premium aftermarket, Brake products mean no compromises and quality at a fair price. ACDelco also offers select Specialty Brake products for Fleet and Police applications as well. Whether you call on our brake pads, brake shoes, rotors or drums, you can rest assured that ACDelco will give you the stopping power you need. And, with our warranty coverage, you will have the confidence and peace of mind that comes with owning ACDelco products.

Features and Benefits:

  • Cast iron and aluminum specifications; no extra stress on the brake boosting mounting
  • Geometrical tolerance ensures that the body and plastic reservoir match for a proper fit
  • Meets the brake performance requirements of SAE J1153 and J1154 testing, providing reliability and quality
  • Piston assembly and return spring help to prevent brake drag, which can cause premature brake pad wear
  • Pressure tested to ensure safe and confident braking
  • The following inspections and maintenance procedures can help prevent potential brake problems:
  • – Calipers and wheel cylinders should be checked every brake inspection and serviced or replaced as required.
  • – Check brake fluid level at every oil change. Replace fluid according to owner's manual recommendations.
  • – Check the thickness of your brake pads.
  • – Inspect the brake lines for rust, punctures, or visible leaks (You may be able to do this, but consult a qualified technician if necessary).
  • The following should be conducted by a qualified technician:
  • – Inspection of brake lining and pads for wear or contamination by brake fluid or grease.
  • – Inspection of the brake hoses for brittleness or cracking.
  • – Inspection of wheel bearings and grease seals.
  • – Parking brake adjustments (as needed).

Specifications:

Bleeder Hoses Included:
Yes
Brake Booster Included:
No
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Master Cylinder Bore Diameter:
0.9448818898 mm
Master Cylinder Cap Included:
Yes
Master Cylinder Material:
Aluminum
Mounting Bracket Included:
No
Mounting Hole Quantity:
2
New Or Remanufactured:
New
Port Quantity:
4
Primary Outlet Thread Diameter:
0.472
Programming Required:
NO
Pushrod Included:
No
Reservoir Included:
Yes
Secondary Outlet Thread Diameter:
0.629

Manufacturer Warranty:

24 Month / Unlimited Mile Limited Warranty (Parts Only). Please see ACDelco.com for more details.

Select a vehicle to narrow ACDelco 18M232 Brake Master Cylinder fitment info!

Last Updated: 09/02/2021

Years Vehicle Per Vehicle Fit NotesFitment Notes

1986

 

1986

 
Buick Century

2.8L V6 Gas OHV
1
 
Professional
GM Brake Code JA2,JA8
with MEDIUM DUTY, HEAVY DUTY Brakes
 

Buick Century



2.8L V6 Gas OHV Professional
GM Brake Code JA2,JA8
with MEDIUM DUTY, HEAVY DUTY Brakes

1 Per Vehicle

1986

 

1985

 

1986

 

1985

 
Buick Century

2.5L L4 Gas OHV,
3.8L V6 Gas OHV
1
 
Professional
GM Brake Code JA2,JA8
with MEDIUM DUTY, HEAVY DUTY Brakes
 

Buick Century



2.5L L4 Gas OHV,
3.8L V6 Gas OHV Professional
GM Brake Code JA2,JA8
with MEDIUM DUTY, HEAVY DUTY Brakes

1 Per Vehicle

1985

 

1985

 
Buick Century

3.0L V6 Gas OHV,
4.3L V6 Diesel OHV
1
 
Professional
GM Brake Code JA2,JA8
with MEDIUM DUTY, HEAVY DUTY Brakes
 

Buick Century



3.0L V6 Gas OHV,
4.3L V6 Diesel OHV Professional
GM Brake Code JA2,JA8
with MEDIUM DUTY, HEAVY DUTY Brakes

1 Per Vehicle

1984

 

1984

 
Buick Century

3.8L V6 Gas OHV
1
 
Professional
GM Brake Code JA2,JA3
Heavy Duty Brakes
w/ Extra Heavy Duty Brakes
 

Buick Century



3.8L V6 Gas OHV Professional
GM Brake Code JA2,JA3
Heavy Duty Brakes
w/ Extra Heavy Duty Brakes

1 Per Vehicle

1984

 

1983

 

1984

 

1983

 
Buick Century

2.5L L4 Gas OHV,
3.0L V6 Gas OHV,
4.3L V6 Diesel OHV
1
 
Professional
GM Brake Code JA2,JA3
Heavy Duty Brakes
w/ Extra Heavy Duty Brakes
 

Buick Century



2.5L L4 Gas OHV,
3.0L V6 Gas OHV,
4.3L V6 Diesel OHV Professional
GM Brake Code JA2,JA3
Heavy Duty Brakes
w/ Extra Heavy Duty Brakes

1 Per Vehicle

1985

 

1985

 
Cadillac Fleetwood

4.1L V8 Gas OHV,
4.3L V6 Diesel OHV
1
 
Professional
FWD
 

Cadillac Fleetwood



4.1L V8 Gas OHV,
4.3L V6 Diesel OHV Professional
FWD

1 Per Vehicle

1986

 

1985

 

1986

 

1985

 
Chevrolet Celebrity

2.5L L4 Gas OHV,
2.8L V6 Gas OHV
1
 
Professional
GM Brake Code JA2,JA8
with MEDIUM DUTY, HEAVY DUTY Brakes
 

Chevrolet Celebrity



2.5L L4 Gas OHV,
2.8L V6 Gas OHV Professional
GM Brake Code JA2,JA8
with MEDIUM DUTY, HEAVY DUTY Brakes

1 Per Vehicle

1985

 

1985

 
Chevrolet Celebrity

4.3L V6 Diesel OHV
1
 
Professional
GM Brake Code JA2,JA8
with MEDIUM DUTY, HEAVY DUTY Brakes
 

Chevrolet Celebrity



4.3L V6 Diesel OHV Professional
GM Brake Code JA2,JA8
with MEDIUM DUTY, HEAVY DUTY Brakes

1 Per Vehicle

1984

 

1983

 

1984

 

1983

 
Chevrolet Celebrity

2.5L L4 Gas OHV,
2.8L V6 Gas OHV,
4.3L V6 Diesel OHV
1
 
Professional
GM Brake Code JA2,JA3
Heavy Duty Brakes
w/ Extra Heavy Duty Brakes
 

Chevrolet Celebrity



2.5L L4 Gas OHV,
2.8L V6 Gas OHV,
4.3L V6 Diesel OHV Professional
GM Brake Code JA2,JA3
Heavy Duty Brakes
w/ Extra Heavy Duty Brakes

1 Per Vehicle

1985

 

1985

 
Oldsmobile 98

3.0L V6 Gas OHV,
3.8L V6 Gas OHV
1
 
Professional
 

Oldsmobile 98



3.0L V6 Gas OHV,
3.8L V6 Gas OHV Professional

1 Per Vehicle

1986

 

1986

 
Oldsmobile Cutlass Ciera

2.8L V6 Gas OHV
1
 
Professional
GM Brake Code JA2,JA8
with MEDIUM DUTY, HEAVY DUTY Brakes
 

Oldsmobile Cutlass Ciera



2.8L V6 Gas OHV Professional
GM Brake Code JA2,JA8
with MEDIUM DUTY, HEAVY DUTY Brakes

1 Per Vehicle

1986

 

1985

 

1986

 

1985

 
Oldsmobile Cutlass Ciera

2.5L L4 Gas OHV,
3.8L V6 Gas OHV
1
 
Professional
GM Brake Code JA2,JA8
with MEDIUM DUTY, HEAVY DUTY Brakes
 

Oldsmobile Cutlass Ciera



2.5L L4 Gas OHV,
3.8L V6 Gas OHV Professional
GM Brake Code JA2,JA8
with MEDIUM DUTY, HEAVY DUTY Brakes

1 Per Vehicle

1985

 

1985

 
Oldsmobile Cutlass Ciera

3.0L V6 Gas OHV,
4.3L V6 Diesel OHV
1
 
Professional
GM Brake Code JA2,JA8
with MEDIUM DUTY, HEAVY DUTY Brakes
 

Oldsmobile Cutlass Ciera



3.0L V6 Gas OHV,
4.3L V6 Diesel OHV Professional
GM Brake Code JA2,JA8
with MEDIUM DUTY, HEAVY DUTY Brakes

1 Per Vehicle

1984

 

1984

 
Oldsmobile Cutlass Ciera

3.8L V6 Gas OHV
1
 
Professional
GM Brake Code JA2,JA3
Heavy Duty Brakes
w/ Extra Heavy Duty Brakes
 

Oldsmobile Cutlass Ciera



3.8L V6 Gas OHV Professional
GM Brake Code JA2,JA3
Heavy Duty Brakes
w/ Extra Heavy Duty Brakes

1 Per Vehicle

1984

 

1983

 

1984

 

1983

 
Oldsmobile Cutlass Ciera

2.5L L4 Gas OHV,
3.0L V6 Gas OHV,
4.3L V6 Diesel OHV
1
 
Professional
GM Brake Code JA2,JA3
Heavy Duty Brakes
w/ Extra Heavy Duty Brakes
 

Oldsmobile Cutlass Ciera



2.5L L4 Gas OHV,
3.0L V6 Gas OHV,
4.3L V6 Diesel OHV Professional
GM Brake Code JA2,JA3
Heavy Duty Brakes
w/ Extra Heavy Duty Brakes

1 Per Vehicle

1986

 

1985

 

1986

 

1985

 
Pontiac 6000

2.5L L4 Gas OHV,
2.8L V6 Gas OHV
1
 
Professional
GM Brake Code JA2,JA8
with MEDIUM DUTY, HEAVY DUTY Brakes
 

Pontiac 6000



2.5L L4 Gas OHV,
2.8L V6 Gas OHV Professional
GM Brake Code JA2,JA8
with MEDIUM DUTY, HEAVY DUTY Brakes

1 Per Vehicle

1985

 

1985

 
Pontiac 6000

4.3L V6 Diesel OHV
1
 
Professional
GM Brake Code JA2,JA8
with MEDIUM DUTY, HEAVY DUTY Brakes
 

Pontiac 6000



4.3L V6 Diesel OHV Professional
GM Brake Code JA2,JA8
with MEDIUM DUTY, HEAVY DUTY Brakes

1 Per Vehicle

1984

 

1984

 
Pontiac 6000

2.5L L4 Gas OHV,
2.8L V6 Gas OHV,
4.3L V6 Diesel OHV
1
 
Professional
GM Brake Code JA2,JA3
Heavy Duty Brakes
w/ Extra Heavy Duty Brakes
 

Pontiac 6000



2.5L L4 Gas OHV,
2.8L V6 Gas OHV,
4.3L V6 Diesel OHV Professional
GM Brake Code JA2,JA3
Heavy Duty Brakes
w/ Extra Heavy Duty Brakes

1 Per Vehicle

1983

 

1983

 
Pontiac 6000

2.5L L4 Gas OHV,
2.8L V6 Gas OHV,
4.3L V6 Diesel OHV
1
 
Professional
GM Brake Code JA2,JA3
Heavy Duty Brakes
 

Pontiac 6000



2.5L L4 Gas OHV,
2.8L V6 Gas OHV,
4.3L V6 Diesel OHV Professional
GM Brake Code JA2,JA3
Heavy Duty Brakes

1 Per Vehicle