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ACDelco 18M838 Brake Master Cylinder

ACDelco 18M838 Brake Master Cylinder Image 1
ACDelco 18M838 Brake Master Cylinder Image 2
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ACDelco 18M838 Brake Master Cylinder Image 8
ACDelco 18M838 Brake Master Cylinder

ACDelco
Brand:ACDelco
Part Number: 18M838
UPC: 00021625204406
Weight: 12.6 lbs
Condition:New



On Sale:

$291.16

Availability:
5 in Stock
Warehouse: US-4
Quantity:

Product Information

Description:

CYLINDER B (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

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

Specifications:

Bleeder Hoses Included:
Yes
Bore Size:
1.750 in.
Brake Booster Included:
No
Master Cylinder Bore Diameter:
1.75 in.
Master Cylinder Bore Diameter:
44.45 mm
Master Cylinder Cap Included:
Yes
Master Cylinder Material:
Aluminum
Mounting Bracket Included:
No
Mounting Hole Diameter:
0.421 in.
Mounting Hole Quantity:
4
Port Quantity:
2
Primary Outlet Thread Diameter:
0.5625 in.
Primary Outlet Thread Diameter:
14.287 mm
Programming Required:
No
Push Rod Included:
No
Reservoir Included:
Yes
Secondary Outlet Thread Diameter:
0.5 in.
Secondary Outlet Thread Diameter:
12.7 mm

Features and Benefits:

  • – 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).
  • – 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).
  • The following inspections and maintenance procedures can help prevent potential brake problems:
  • The following should be conducted by a qualified technician:

Specifications:

Country of Origin:
US

Select a vehicle to narrow ACDelco 18M838 Brake Master Cylinder fitment info!

Last Updated: 03/09/2024

Years Vehicle Per Vehicle Fit NotesFitment Notes
Chevrolet B7

8.1L V8 Gas OHV
1
 
Professional
with Dayton Caliper
1 3/4 Bore Diameter
 

Chevrolet B7



8.1L V8 Gas OHV Professional
with Dayton Caliper
1 3/4 Bore Diameter

1 Per Vehicle
Chevrolet B7

7.2L L6 Diesel Turbo
1
 
Professional
with Dayton Caliper
1 3/4 Bore Diameter
 

Chevrolet B7



7.2L L6 Diesel Turbo Professional
with Dayton Caliper
1 3/4 Bore Diameter

1 Per Vehicle
Chevrolet B7

7.4L V8 Gas OHV
1
 
Professional
with Dayton Caliper
1 3/4 Bore Diameter
 

Chevrolet B7



7.4L V8 Gas OHV Professional
with Dayton Caliper
1 3/4 Bore Diameter

1 Per Vehicle
Chevrolet B7

6.5L V8 Diesel OHV Turbo
1
 
Professional
with Dayton Caliper
1 3/4 Bore Diameter
 

Chevrolet B7



6.5L V8 Diesel OHV Turbo Professional
with Dayton Caliper
1 3/4 Bore Diameter

1 Per Vehicle
Chevrolet B7

7.0L V8 Gas OHV
1
 
Professional
with Dayton Caliper
1 3/4 Bore Diameter
 

Chevrolet B7



7.0L V8 Gas OHV Professional
with Dayton Caliper
1 3/4 Bore Diameter

1 Per Vehicle
Chevrolet B7

6.0L V8 Gas,
6.6L L6 Diesel Turbo
1
 
Professional
with Dayton Caliper
1 3/4 Bore Diameter
 

Chevrolet B7



6.0L V8 Gas,
6.6L L6 Diesel Turbo Professional
with Dayton Caliper
1 3/4 Bore Diameter

1 Per Vehicle
Chevrolet C50

5.7L V8 Gas
1
 
Professional
with 2.50in Dual Piston Dayton Caliper
1 3/4 Bore Diameter
 

Chevrolet C50



5.7L V8 Gas Professional
with 2.50in Dual Piston Dayton Caliper
1 3/4 Bore Diameter

1 Per Vehicle
Chevrolet C5500 Kodiak

6.0L V8 Gas
1
 
Professional
 

Chevrolet C5500 Kodiak



6.0L V8 Gas Professional

1 Per Vehicle
Chevrolet C60 Kodiak

6.0L V8 Gas,
6.6L L6 Diesel Turbo,
7.0L V8 Gas OHV
1
 
Professional
w/ 8,100 lb. Front Axle
 

Chevrolet C60 Kodiak



6.0L V8 Gas,
6.6L L6 Diesel Turbo,
7.0L V8 Gas OHV Professional
w/ 8,100 lb. Front Axle

1 Per Vehicle
Chevrolet C70

10.4L V8 Diesel Turbo,
6.0L V8 Gas,
7.0L V8 Gas,
8.2L V8 Diesel,
8.2L V8 Diesel Turbo
1
 
Professional
with 8,100lb Front Axle
 

Chevrolet C70



10.4L V8 Diesel Turbo,
6.0L V8 Gas,
7.0L V8 Gas,
8.2L V8 Diesel,
8.2L V8 Diesel Turbo Professional
with 8,100lb Front Axle

1 Per Vehicle
Chevrolet C70 Kodiak

6.0L V8 Gas,
6.6L L6 Diesel Turbo,
7.0L V8 Gas OHV
1
 
Professional
w/ 8,100 lb. Front Axle
 

Chevrolet C70 Kodiak



6.0L V8 Gas,
6.6L L6 Diesel Turbo,
7.0L V8 Gas OHV Professional
w/ 8,100 lb. Front Axle

1 Per Vehicle
Chevrolet C70 Kodiak

6.0L V8 Gas,
6.6L L6 Diesel Turbo,
7.0L V8 Gas OHV
1
 
Professional
with 8,100lb Front Axle
 

Chevrolet C70 Kodiak



6.0L V8 Gas,
6.6L L6 Diesel Turbo,
7.0L V8 Gas OHV Professional
with 8,100lb Front Axle

1 Per Vehicle
Chevrolet P6000

6.0L V8 Gas,
6.6L L6 Diesel Turbo,
7.0L V8 Gas OHV
1
 
Professional
w/ 8,000 lb Front Axle
1 3/4 Bore Diameter
 

Chevrolet P6000



6.0L V8 Gas,
6.6L L6 Diesel Turbo,
7.0L V8 Gas OHV Professional
w/ 8,000 lb Front Axle
1 3/4 Bore Diameter

1 Per Vehicle
GMC B7

8.1L V8 Gas OHV
1
 
Professional
with Dayton Caliper
1 3/4 Bore Diameter
 

GMC B7



8.1L V8 Gas OHV Professional
with Dayton Caliper
1 3/4 Bore Diameter

1 Per Vehicle
GMC B7

7.2L L6 Diesel Turbo
1
 
Professional
with Dayton Caliper
1 3/4 Bore Diameter
 

GMC B7



7.2L L6 Diesel Turbo Professional
with Dayton Caliper
1 3/4 Bore Diameter

1 Per Vehicle
GMC B7

7.4L V8 Gas OHV
1
 
Professional
with Dayton Caliper
1 3/4 Bore Diameter
 

GMC B7



7.4L V8 Gas OHV Professional
with Dayton Caliper
1 3/4 Bore Diameter

1 Per Vehicle
GMC B7

6.5L V8 Diesel OHV Turbo
1
 
Professional
with Dayton Caliper
1 3/4 Bore Diameter
 

GMC B7



6.5L V8 Diesel OHV Turbo Professional
with Dayton Caliper
1 3/4 Bore Diameter

1 Per Vehicle
GMC B7

7.0L V8 Gas OHV
1
 
Professional
with Dayton Caliper
1 3/4 Bore Diameter
 

GMC B7



7.0L V8 Gas OHV Professional
with Dayton Caliper
1 3/4 Bore Diameter

1 Per Vehicle
GMC B7

6.0L V8 Gas,
6.6L L6 Diesel Turbo
1
 
Professional
with Dayton Caliper
1 3/4 Bore Diameter
 

GMC B7



6.0L V8 Gas,
6.6L L6 Diesel Turbo Professional
with Dayton Caliper
1 3/4 Bore Diameter

1 Per Vehicle
GMC C5000

5.7L V8 Gas
1
 
Professional
1 3/4 Bore Diameter
 

GMC C5000



5.7L V8 Gas Professional
1 3/4 Bore Diameter

1 Per Vehicle
GMC C5000 Topkick

6.0L V8 Gas
1
 
Professional
1 3/4 Bore Diameter
 

GMC C5000 Topkick



6.0L V8 Gas Professional
1 3/4 Bore Diameter

1 Per Vehicle
GMC C6000 Topkick

6.0L V8 Gas,
6.6L L6 Diesel Turbo,
7.0L V8 Gas OHV
1
 
Professional
w/ 8,100 lb. Front Axle
 

GMC C6000 Topkick



6.0L V8 Gas,
6.6L L6 Diesel Turbo,
7.0L V8 Gas OHV Professional
w/ 8,100 lb. Front Axle

1 Per Vehicle
GMC C7000 Topkick

6.0L V8 Gas,
6.6L L6 Diesel Turbo,
7.0L V8 Gas OHV
1
 
Professional
with Dayton Caliper
 

GMC C7000 Topkick



6.0L V8 Gas,
6.6L L6 Diesel Turbo,
7.0L V8 Gas OHV Professional
with Dayton Caliper

1 Per Vehicle
GMC C7000 Topkick

6.0L V8 Gas,
6.6L L6 Diesel Turbo,
7.0L V8 Gas OHV
1
 
Professional
 

GMC C7000 Topkick



6.0L V8 Gas,
6.6L L6 Diesel Turbo,
7.0L V8 Gas OHV Professional

1 Per Vehicle
GMC P6500

6.0L V8 Gas,
6.6L L6 Diesel Turbo,
7.0L V8 Gas OHV
1
 
Professional
w/ 8,000 lb Front Axle
 

GMC P6500



6.0L V8 Gas,
6.6L L6 Diesel Turbo,
7.0L V8 Gas OHV Professional
w/ 8,000 lb Front Axle

1 Per Vehicle