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ACDELCO 18M309 Part Description
Manufacturer
ACDELCO 18M309 Specifications
Product Attributes
| Secondary Outlet Thread Diameter | 0.5 IN |
| Primary Outlet Thread Diameter | 0.5625 IN |
| Master Cylinder Bore Diameter | 0.94488189 IN |
| Port Quantity | 2 |
| Mounting Hole Quantity | 2 |
| Height (in) | 5.6 in |
| Weight (lb) | 6.85 lb |
| Width (in) | 7.7 in |
| Length (In) | 11.3 IN |
| Secondary Outlet Thread Diameter | 12.7 MM |
| Primary Outlet Thread Diameter | 14.287 MM |
| Master Cylinder Bore Diameter | 24 MM |
| Signs of Wear & Troubleshooting - Section 1 - Bullet 4 | A low or sinking brake pedal. |
| Product Description | 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. ⚠<b> WARNING:</b> Cancer and Reproductive Harm - www.P65Warnings.ca.gov |
| Bore Size (mm) | 24.000 mm |
| FAQ - Question 3 | Are these brake parts durable? |
| Signs of Wear & Troubleshooting - Section 1 - Header | Brake cylinder signs of wear include: |
| Signs of Wear & Troubleshooting - Section 1 - Bullet 1 | Brake warning light is on. |
| Good Maintenance Practices - Section 1 - Bullet 2 | Calipers and wheel cylinders should be checked every brake inspection and serviced or replaced as required. |
| Features & Benefits - Bullet 3 | Cast iron and aluminum specifications; no extra stress on the brake boosting mounting |
| 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 4 | Check the thickness of your brake pads. |
| Signs of Wear & Troubleshooting - Section 1 - Bullet 3 | Difficulty stopping the vehicle. |
| FAQ - Question 1 | Do I have to replace all my brake parts when replacing my brake cylinder? |
| FAQ - Question 2 | Does ACDelco offer other grades of brake cylinders? |
| Signs of Wear & Troubleshooting - Section 1 - Bullet 2 | Fluid spots beneath the car, indicating there may be a leak within the cylinder. |
| Features & Benefits - Bullet 4 | Geometrical tolerance ensures that the body and plastic reservoir match for a proper fit |
| 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 2 - Bullet 2 | Inspection of brake lining and pads for wear or contamination by brake fluid or grease. |
| Good Maintenance Practices - Section 2 - Bullet 1 | Inspection of the brake hoses for brittleness or cracking. |
| Good Maintenance Practices - Section 2 - Bullet 3 | Inspection of wheel bearings and grease seals. |
| Features & Benefits - Bullet 1 | Meets the brake performance requirements of SAE J1153 and J1154 testing, providing reliability and quality |
| Brake Booster Included | No |
| Programming Required | No |
| Mounting Bracket Included | No |
| FAQ - Answer 1 | No, but it is a good idea to inspect them for wear-out, cracking, leaking etc. |
| Good Maintenance Practices - Section 2 - Bullet 4 | Parking brake adjustments (as needed). |
| Features & Benefits - Bullet 5 | Piston assembly and return spring help to prevent brake drag, which can cause premature brake pad wear |
| Features & Benefits - Bullet 2 | Pressure tested to ensure safe and confident braking |
| Good Maintenance Practices - Section 1 - Header | The following inspections and maintenance procedures can help prevent potential brake problems: |
| Good Maintenance Practices - Section 2 - Header | The following should be conducted by a qualified technician: |
| Bleeder Hoses Included | Yes |
| Reservoir Included | Yes |
| Master Cylinder Cap Included | Yes |
| FAQ - Answer 2 | Yes, ACDelco also offers GM OE brake cylinders. |
| FAQ - Answer 3 | Yes, ACDelco Professional Brake Cylinders come with a 12 month / unlimited mile warranty. |
| Master Cylinder Material | Iron |
| Mounting Hole Diameter | 0.423 IN |
| Push Rod Included | No |
Additional Information
| Warranty Special | 24 Months/Unlimited Miles Limited Warranty (Parts Only). Please see ACDelco.com for more details|24 Months/40,000 Kilometers Limited Warranty (Parts Only). Please see ACDelcocanada.com for more details |
| Harmonized Tariff Code (HTS) | 8413919060 |
| Country of Origin 3 | CN |
| Country of Origin 2 | MX |
| Country of Origin (Primary) | US |
| Warranty Special UOM | TX |
| UPC | 00036666697964 |
ACDELCO 18M309 Cross References
| Brand | Part Number |
|---|---|
| DORMAN | M105801 |
ACDELCO 18M309 Fits Vehicles
- Buick Regal (1982)
- Buick Riviera (1982)
- Chevrolet El Camino (1982)
- Chevrolet Monte Carlo (1982)
- Chevrolet S10 (1982-1988)
- GMC Caballero (1982)
- GMC S15 (1982-1988)
- Oldsmobile Cutlass Calais (1982)
- Oldsmobile Cutlass Supreme (1982)
- Pontiac Bonneville (1982)
- Pontiac Grand Prix (1982)
- Pontiac Parisienne (1982)
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ACDELCO 18M309 Manufacturer Information
A true OEM auto parts brand for GM and non-GM vehicles, ACDelco® offers a wide portfolio of parts designed to keep vehicles on the road longer. These parts work precisely and fit perfectly because they are designed, engineered, tested, and backed by General Motors. But ACDelco also carries aftermarket components that go through the same 18-step quality approval process as the OE parts. Whether customers choose OE or aftermarket, they’d get the same reliable performance, precise engineering, and superior reliability for years to come. ACDelco’s expansive product portfolio includes alternators, filters, batteries, brakes, belts and hoses, oil and fluids, and suspension parts. These products are made to meet GM and non-GM vehicles’ ever-evolving powertrain, collision, maintenance, and repair needs.
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