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Raybestos MC39580 Brake Master Cylinder
| Brand | Raybestos MC39580 |
|---|---|
| Mounting Hole Quantity | 2 |
| Master Cylinder Material | Aluminum |
| Mounting Hole Diameter | 0.433 |
| Bore Size | 24.000 |
| Number of Ports | 4 |
| Primary Port Thread A | M11x1.5 |
| Secondary Port Thread A | M12x1 |
| Product line | Element3; New |
| Fits | Buick, Cadillac, Oldsmobile, and Pontiac · 34 vehicles |
Aluminum construction. Lightweight master cylinder housing for dependable hydraulic performance.
Four-port design. Supports multiple brake line connections in a compact layout.
Element3 line. Raybestos brake hydraulics engineered for consistent stopping response.
Cross-references Cardone New 13-2341, Cardone Reman 10-2341 and Centric Parts 130.62062 for the same application. See all 26.
Raybestos MC39580 Brake Master Cylinder
The Raybestos Element3 New MC39580 brake master cylinder is built for direct replacement service on select GM full-size cars and chassis applications. It features an aluminum master cylinder body, a 24.000 bore size, and a 4-port layout for the specified brake system connections.
Element3 New Product Line
Raybestos Element3 New parts are positioned for replacement use where accurate fitment and OE-style hydraulic connections matter. For this brake master cylinder, the design centers on the listed bore size, port thread specifications, and mounting pattern to support a proper brake system repair on vehicles such as Buick LeSabre, Cadillac DeVille, Cadillac Fleetwood, Oldsmobile 98, Oldsmobile Delta 88, and Pontiac Bonneville.
Key Features
- Brake master cylinder for hydraulic brake system service
- Aluminum master cylinder material for a lightweight housing
- 24.000 bore size
- 2 mounting holes with 0.433 mounting hole diameter
- 4 ports for brake line connections
- Primary port thread: M11x1.5
- Secondary port thread: M12x1
- Raybestos MC39580 part number for catalog matching and ordering
Vehicle Fitment
- Fits 1986-1990 Buick LeSabre, N/A
- Fits 1987-1990 Cadillac Commercial Chassis, N/A
- Fits 1990 Cadillac DeVille, N/A; Rotor Diameter 260 MM
- Fits 1986-1990 Oldsmobile 98, N/A
- Fits 1987-1990 Oldsmobile Delta 88, N/A
- Fits 1987-1990 Pontiac Bonneville, N/A
- Fits 1987-1989 Cadillac DeVille, N/A; w/ 225mm X 45mm Brakes
- Fits 1987-1989 Cadillac Fleetwood, N/A
- Fits 1985 Cadillac DeVille, N/A
This part cross-references Cardone New 13-2341 for the same application.
What This Part Helps Address
- Brake pedal travel that feels excessive or inconsistent
- Loss of hydraulic pressure in the brake system
- External leakage at the master cylinder body or ports
- Brake warning concerns tied to master cylinder wear
- Restoration of proper brake fluid movement through the hydraulic circuit
Installation Notes and Tips
Confirm the bore size, port thread sizes, and 2-hole mounting pattern before installation. Match the vehicle-specific brake configuration, including the listed Cadillac DeVille and Fleetwood brake notes, and verify all line connections are clean and correctly threaded before bleeding the system. After installation, bleed the brake system thoroughly and inspect for leaks at each port.
Quality Assurance
Raybestos supplies this MC39580 master cylinder as a new replacement part with application-specific dimensions and port specifications for the listed vehicles. Verify fitment against the vehicle brake configuration before installation.
| Year | Make | Model | Body Type | # Doors | Drive Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 1990 | Buick | LeSabre | Sedan | 4 Door | — | N/A | Element3; New |
| 1990 | Buick | LeSabre | Coupe | 2 Door | — | N/A | Element3; New |
| 1990 | Cadillac | Commercial Chassis | — | — | — | N/A | Element3; New |
| 1990 | Cadillac | DeVille | — | — | — | N/A | Rotor Diameter 260 MM; Element3; New |
| 1990 | Oldsmobile | 98 | — | — | — | N/A | Element3; New |
| 1990 | Oldsmobile | Delta 88 | — | — | — | N/A | Element3; New |
| 1990 | Pontiac | Bonneville | — | — | — | N/A | Element3; New |
| 1989 | Buick | LeSabre | Sedan | 4 Door | — | N/A | Element3; New |
| 1989 | Buick | LeSabre | Coupe | 2 Door | — | N/A | Element3; New |
| 1989 | Cadillac | Commercial Chassis | — | — | FWD | N/A | Element3; New |
| 1989 | Cadillac | DeVille | — | — | — | N/A | w/ 225mm X 45mm Brakes; Element3; New |
| 1989 | Cadillac | Fleetwood | — | — | FWD | N/A | Element3; New |
| 1989 | Oldsmobile | 98 | — | — | — | N/A | Element3; New |
| 1989 | Oldsmobile | Delta 88 | — | — | — | N/A | Element3; New |
| 1989 | Pontiac | Bonneville | — | — | — | N/A | Element3; New |
| 1988 | Buick | LeSabre | Sedan | 4 Door | — | N/A | Element3; New |
| 1988 | Buick | LeSabre | Coupe | 2 Door | — | N/A | Element3; New |
| 1988 | Cadillac | Commercial Chassis | — | — | FWD | N/A | Element3; New |
| 1988 | Cadillac | DeVille | — | — | — | N/A | w/ 225mm X 45mm Brakes; Element3; New |
| 1988 | Cadillac | Fleetwood | — | — | FWD | N/A | Element3; New |
| 1988 | Oldsmobile | 98 | — | — | — | N/A | Element3; New |
| 1988 | Oldsmobile | Delta 88 | — | — | — | N/A | Element3; New |
| 1988 | Pontiac | Bonneville | — | — | — | N/A | Element3; New |
| 1987 | Buick | LeSabre | Sedan | 4 Door | — | N/A | Element3; New |
| 1987 | Buick | LeSabre | Coupe | 2 Door | — | N/A | Element3; New |
| 1987 | Cadillac | Commercial Chassis | — | — | — | N/A | Element3; New |
| 1987 | Cadillac | DeVille | — | — | — | N/A | w/ 225mm X 45mm Brakes; Element3; New |
| 1987 | Cadillac | Fleetwood | — | — | — | N/A | Element3; New |
| 1987 | Oldsmobile | 98 | — | — | — | N/A | Element3; New |
| 1987 | Oldsmobile | Delta 88 | — | — | — | N/A | Element3; New |
| 1987 | Pontiac | Bonneville | — | — | — | N/A | Element3; New |
| 1986 | Buick | LeSabre | — | — | — | N/A | Element3; New |
| 1986 | Oldsmobile | 98 | — | — | — | N/A | Element3; New |
| 1985 | Cadillac | DeVille | — | — | — | N/A | Element3; New |
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