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ACDelco 251-2018 - Engine Water Pump Gasket
Product Overview
The ACDelco 251-2018 Engine Water Pump Gasket is designed to ensure a perfect seal for your vehicle's water pump, preventing leaks and maintaining optimal engine temperature. With OE-level quality and reliability, this gasket guarantees a precise fit for a variety of vehicle makes, including Buick, Chevrolet, Oldsmobile, Pontiac, and Saturn. Trust in ACDelco's reputation for excellence in automotive parts and ensure your vehicle operates smoothly. Choose ACDelco 251-2018 for dependable performance and peace of mind every time you service your vehicle.
Cross Reference Numbers
This ACDelco 251-2018 is equivalent to or replaces the following part numbers: 2512018.
Vehicle Compatibility
- Buick Century (1987-1988) 2.8 V6
- Buick Regal (1988-1989) 2.8 V6
- Buick Regal (1989-1996) 3.1 V6
- Buick Skylark (1994-1998) 3.1 V6
- Chevrolet Beretta (1987-1989) 2.8 V6
- Chevrolet Cavalier (1990-1994) 3.1 V6
- Chevrolet Lumina (1990-2001) 3.1 V6
- Pontiac Grand Prix (1989-2003) 3.1 V6
- Oldsmobile Cutlass Supreme (1989-1997) 3.1 V6
- Saturn Relay (2005-2006) 3.5 V6
This also fits other applications. Please use the vehicle selector tool to verify fitment.
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Frequently Asked Questions
What is the purpose of the ACDelco 251-2018 Engine Water Pump Gasket?
The ACDelco 251-2018 Engine Water Pump Gasket ensures a proper seal between the water pump and the engine block, preventing coolant leaks and maintaining engine performance.
How do I know if I need to replace my water pump gasket?
If you notice coolant leaks or overheating issues, it may be time to replace your water pump gasket with the ACDelco 251-2018 for reliable performance.
Are there any specific DTCs associated with water pump gasket failure?
Common Diagnostic Trouble Codes (DTCs) related to water pump gasket failure include P0128 and P0217, indicating issues with engine temperature and coolant flow.
How can I ensure proper installation of the ACDelco 251-2018?
For optimal results, follow the manufacturer's installation instructions and ensure all surfaces are clean and free of debris before fitting the ACDelco 251-2018 Engine Water Pump Gasket.
Why should I choose the ACDelco 251-2018?
The ACDelco 251-2018 is engineered to meet or exceed OEM specifications, providing a factory-correct replacement that restores safety and performance. Order ACDelco 251-2018 today for a factory-correct replacement that restores safety and performance.
- BrandACDelco
- ManufacturerACDelco
- MPN251-2018
- FeaturesThickness : .020
- Cross Reference Numbers2512018
- Part TypeEngine Water Pump Gasket
- Fitment
- Fitment TypeVehicle Specific
| Year | Make | Model | Submodel | Notes |
|---|---|---|---|---|
| 2004 | Chevrolet | Malibu | LS (3.5 V6 GAS) | VIN: 8 |
| 2004 | Chevrolet | Malibu | LT (3.5 V6 GAS) | VIN: 8 |
| 2004 | Chevrolet | Malibu | Maxx (3.5 V6 GAS) | VIN: 8 |
| 2004 | Chevrolet | Malibu | Maxx LS (3.5 V6 GAS) | VIN: 8 |
| 2004 | Chevrolet | Malibu | Maxx LT (3.5 V6 GAS) | VIN: 8 |
| 2005 | Chevrolet | Malibu | LS (3.5 V6 GAS) | VIN: 8 |
| 2005 | Chevrolet | Malibu | LT (3.5 V6 GAS) | VIN: 8 |
| 2005 | Chevrolet | Malibu | Maxx LS (3.5 V6 GAS) | VIN: 8 |
| 2005 | Chevrolet | Malibu | Maxx LT (3.5 V6 GAS) | VIN: 8 |
| 2005 | Pontiac | G6 | Base (3.5 V6 GAS) | |
| 2005 | Pontiac | G6 | GT (3.5 V6 GAS) | |
| 2006 | Pontiac | G6 | Base (3.5 V6 GAS) | VIN: 8 |
| 2006 | Pontiac | G6 | GT (3.5 V6 GAS) | VIN: 8 |
| 2006 | Chevrolet | Malibu | LS (3.5 V6 GAS) | VIN: 8 |
| 2006 | Chevrolet | Malibu | LT (3.5 V6 GAS) | VIN: 8 |
| 2006 | Chevrolet | Malibu | LTZ (3.5 V6 GAS) | VIN: 8 |
| 2006 | Chevrolet | Malibu | Maxx LS (3.5 V6 GAS) | VIN: 8 |
| 2006 | Chevrolet | Malibu | Maxx LT (3.5 V6 GAS) | VIN: 8 |
| 2006 | Chevrolet | Malibu | Maxx LTZ (3.5 V6 GAS) | VIN: 8 |
| 2006 | Buick | Rendezvous | CX (3.5 V6 GAS) | VIN: L |
| 2006 | Buick | Rendezvous | CXL (3.5 V6 GAS) | VIN: L |
| 1994 | Buick | Century | Custom (3.1 V6 GAS) | Engine: L82, VIN: M |
| 1994 | Buick | Century | Special (3.1 V6 GAS) | Engine: L82, VIN: M |
| 1994 | Oldsmobile | Cutlass Ciera | S (3.1 V6 GAS) | Engine: L82, VIN: M |
| 1994 | Oldsmobile | Cutlass Ciera | SL (3.1 V6 GAS) | Engine: L82, VIN: M |
| 1988 | Buick | Century | Custom (2.8 V6 GAS) | VIN: W |
| 1988 | Buick | Century | Estate Wagon (2.8 V6 GAS) | VIN: W |
| 1988 | Buick | Century | Limited (2.8 V6 GAS) | VIN: W |
| 1988 | Chevrolet | Beretta | Base (2.8 V6 GAS) | VIN: W |
| 1988 | Chevrolet | Celebrity | Base (2.8 V6 GAS) | VIN: W |
| 1988 | Chevrolet | Celebrity | Eurosport (2.8 V6 GAS) | VIN: W |
| 1988 | Chevrolet | Corsica | Base (2.8 V6 GAS) | VIN: W |
| 1988 | Chevrolet | Corsica | LT (2.8 V6 GAS) | VIN: W |
| 1988 | Pontiac | 6000 | Base (2.8 V6 GAS) | VIN: W |
| 1988 | Pontiac | 6000 | LE (2.8 V6 GAS) | VIN: W |
| 1988 | Pontiac | 6000 | SE (2.8 V6 GAS) | VIN: W |
| 1988 | Pontiac | 6000 | STE (2.8 V6 GAS) | VIN: W |
| 1988 | Pontiac | 6000 | STE (3.1 V6 GAS) | Engine: LHO, VIN: T |
| 1988 | Oldsmobile | Cutlass Supreme | Base (2.8 V6 GAS) | VIN: W |
| 1988 | Oldsmobile | Cutlass Supreme | Indy 500 Pace Car (2.8 V6 GAS) | VIN: W |
| 1988 | Oldsmobile | Cutlass Supreme | International (2.8 V6 GAS) | VIN: W |
| 1988 | Oldsmobile | Cutlass Supreme | SL (2.8 V6 GAS) | VIN: W |
| 1987 | Buick | Century | Custom (2.8 V6 GAS) | VIN: W |
| 1987 | Buick | Century | Estate Wagon (2.8 V6 GAS) | VIN: W |
| 1987 | Buick | Century | Limited (2.8 V6 GAS) | VIN: W |
| 1987 | Chevrolet | Beretta | Base (2.8 V6 GAS) | VIN: W |
| 1987 | Chevrolet | Corsica | Base (2.8 V6 GAS) | VIN: W |
| 1987 | Chevrolet | Corsica | LT (2.8 V6 GAS) | VIN: W |
| 1987 | Chevrolet | Celebrity | Base (2.8 V6 GAS) | VIN: W |
| 1987 | Chevrolet | Celebrity | Estate (2.8 V6 GAS) | VIN: W |
| 1987 | Chevrolet | Celebrity | Eurosport (2.8 V6 GAS) | VIN: W |
| 1987 | Oldsmobile | Cutlass Ciera | Brougham (2.8 V6 GAS) | VIN: W |
| 1987 | Oldsmobile | Cutlass Ciera | GT (2.8 V6 GAS) | VIN: W |
| 1987 | Oldsmobile | Cutlass Ciera | LS (2.8 V6 GAS) | VIN: W |
| 1987 | Oldsmobile | Cutlass Ciera | S (2.8 V6 GAS) | VIN: W |
| 1987 | Oldsmobile | Cutlass Ciera | SL (2.8 V6 GAS) | VIN: W |
| 1987 | Oldsmobile | Firenza | GT (2.8 V6 GAS) | VIN: W |
| 1987 | Oldsmobile | Cutlass Cruiser | Brougham (2.8 V6 GAS) | VIN: W |
| 1987 | Oldsmobile | Cutlass Cruiser | LS (2.8 V6 GAS) | VIN: W |
| 1987 | Pontiac | 6000 | Base (2.8 V6 GAS) | VIN: W |
| 1987 | Pontiac | 6000 | LE (2.8 V6 GAS) | VIN: W |
| 1987 | Pontiac | 6000 | SE (2.8 V6 GAS) | VIN: W |
| 1987 | Pontiac | 6000 | STE (2.8 V6 GAS) | VIN: W |
| 1995 | Buick | Century | Custom (3.1 V6 GAS) | Engine: L82, VIN: M |
| 1995 | Buick | Century | Special (3.1 V6 GAS) | Engine: L82, VIN: M |
| 1995 | Oldsmobile | Cutlass Ciera | Base (3.1 V6 GAS) | Engine: L82, VIN: M |
| 1996 | Buick | Century | Custom (3.1 V6 GAS) | Engine: L82, VIN: M |
| 1996 | Buick | Century | Limited (3.1 V6 GAS) | Engine: L82, VIN: M |
| 1996 | Buick | Century | Special (3.1 V6 GAS) | Engine: L82, VIN: M |
| 1996 | Oldsmobile | Cutlass Ciera | Base (3.1 V6 GAS) | Engine: L82, VIN: M |
| 1989 | Chevrolet | Beretta | Base (2.8 V6 GAS) | VIN: W |
| 1989 | Chevrolet | Beretta | GT (2.8 V6 GAS) | VIN: W |
| 1989 | Chevrolet | Corsica | Base (2.8 V6 GAS) | VIN: W |
| 1989 | Chevrolet | Corsica | LTZ (2.8 V6 GAS) | VIN: W |
| 1989 | Pontiac | 6000 | LE (2.8 V6 GAS) | VIN: W |
| 1989 | Pontiac | 6000 | Special Edition (2.8 V6 GAS) | VIN: W |
| 1989 | Oldsmobile | Cutlass Ciera | Base (2.8 V6 GAS) | VIN: W |
| 1989 | Oldsmobile | Cutlass Ciera | SL (2.8 V6 GAS) | VIN: W |
| 1989 | Oldsmobile | Cutlass Cruiser | Base (2.8 V6 GAS) | VIN: W |
| 1989 | Oldsmobile | Cutlass Cruiser | SL (2.8 V6 GAS) | VIN: W |
| 1990 | Chevrolet | Cavalier | Base (3.1 V6 GAS) | Engine: LHO, VIN: T |
| 1990 | Chevrolet | Cavalier | RS (3.1 V6 GAS) | Engine: LHO, VIN: T |
| 1990 | Chevrolet | Cavalier | Z24 (3.1 V6 GAS) | Engine: LHO, VIN: T |
| 1991 | Chevrolet | Cavalier | RS (3.1 V6 GAS) | Engine: LHO, VIN: T |
| 1991 | Chevrolet | Cavalier | Z24 (3.1 V6 GAS) | Engine: LHO, VIN: T |
| 1991 | Pontiac | Sunbird | GT (3.1 V6 GAS) | Engine: LHO, VIN: T |
| 1991 | Pontiac | Sunbird | LE (3.1 V6 GAS) | Engine: LHO, VIN: T |
| 1991 | Pontiac | Sunbird | SE (3.1 V6 GAS) | Engine: LHO, VIN: T |
| 1991 | Pontiac | 6000 | LE (3.1 V6 GAS) | Engine: LHO, VIN: T |
| 1991 | Pontiac | 6000 | Special Edition (3.1 V6 GAS) | Engine: LHO, VIN: T |
| 2000 | Buick | Century | Custom (3.1 V6 GAS) | |
| 2000 | Buick | Century | Limited (3.1 V6 GAS) | |
| 2008 | Chevrolet | Equinox | LS (3.4 V6 GAS) | Engine: LNJ, VIN: F |
| 2008 | Chevrolet | Equinox | LT (3.4 V6 GAS) | Engine: LNJ, VIN: F |
| 2008 | Chevrolet | Equinox | LTZ (3.4 V6 GAS) | Engine: LNJ, VIN: F |
| 2008 | Pontiac | Torrent | Base (3.4 V6 GAS) | Engine: LNJ, VIN: F |
| 2009 | Chevrolet | Equinox | LS (3.4 V6 GAS) | Engine: LNJ, VIN: F |
| 2009 | Chevrolet | Equinox | LT (3.4 V6 GAS) | Engine: LNJ, VIN: F |
| 2009 | Chevrolet | Equinox | LTZ (3.4 V6 GAS) | Engine: LNJ, VIN: F |
| 2009 | Pontiac | Torrent | Base (3.4 V6 GAS) | Engine: LNJ, VIN: F |
Warranty Overview
At Newparts, we stand behind the quality of the products we sell. Every part we offer is backed by a warranty designed to give you peace of mind and protect your investment.
Standard Warranty – Most Parts
Coverage: 2 years or 24,000 miles (whichever comes first) from purchase date.
Protection: Defects in materials or workmanship under normal personal use.
Eligibility: Applies only to the original purchaser and the vehicle where the part was first installed.
Exclusions:
Wear-and-tear items (brake pads, filters, bulbs, wipers, etc.)
Commercial, fleet, rideshare, off-road, or racing use
Improper installation, misuse, accidents, or modifications
Not Covered: Labor, shipping, towing, or incidental costs.
Bison Performance Warranty – Our House Brand
Coverage: Limited Lifetime Warranty for as long as you own your vehicle.
Applies To: All products sold under the Bison Performance label.
Premium Protection: Goes beyond our standard warranty — if it’s a Bison product, the 2-year/24k mile limit is replaced with lifetime coverage.
Exclusions: Same as the standard warranty (normal wear, commercial use, improper installation, etc.).
What’s Included: Replacement of the defective product (labor and shipping excluded).
Warranty Claim Requirements
To keep claims fast and fair, we require:
Proof of purchase (invoice or order confirmation).
Photos or videos showing the defective part, order number, date, VIN, and odometer reading.
Diagnostic reports or part returns for non-visible issues may be requested.
Claims must be truthful, properly documented, and reflect normal consumer use.
Buy With Confidence: We back our products because we believe in their quality, with a transparent, customer-first warranty process you can trust. And with Bison Performance products, you’ll enjoy Limited Lifetime protection—an assurance few brands can match.
For full details and exclusions, please see our complete Warranty Terms & Conditions.
This summary is for convenience only. For full warranty coverage details, exclusions, and requirements, see our official Warranty Terms & Conditions. In case of conflict, the full policy governs.
Return Policy Overview
Most parts can be returned within 30 days of delivery if unused, uninstalled, and in original packaging.
To start a return, use our Return Portal or contact support.
Restocking fee: Up to 20% may apply for certain orders (buyer’s remorse, order errors, or special-order items)
Refunds: Issued to your original payment method within 3–5 business days after inspection
Exchanges: Not automatic — please return and reorder
Replacements: May be approved for incorrect or defective items reported within 7 days
Not returnable:
Used or installed parts
Electrical components
Opened filter kits, gaskets, or contaminated items
Final sale or custom orders
Important Notes:
Return shipping is your responsibility unless we made a verified error
Fitment is the customer’s responsibility (we can assist, but do not guarantee)
Country of origin may vary and is not grounds for return
For complete details, please see our full Return Policy.
This Returns summary is provided for convenience only. All returns, refunds, and exchanges are subject to the complete Returns Policy. In the event of any conflict, the full policy governs.
Fast, Reliable Shipping — Straight to Your Door
We ship most orders the same day when placed before 2 PM CST (Monday–Friday). Our main warehouse is just east of Nashville, TN, and we also ship from multiple locations nationwide to get your order to you as quickly as possible.
We use trusted carriers like UPS, FedEx, and USPS.
Tracking info is emailed to you as soon as your order ships.
Delivery estimates at checkout are based on carrier data, but not guaranteed.
Need help with a shipment?
If your order is missing, damaged, or incorrect, just let us know within 5 days of delivery. We’ll walk you through the quick claim process — including a few photos to help us make things right.
For full details, please see our complete Shipping Policy.
This Shipping summary is provided for convenience only. Delivery times, carrier terms, fees, restrictions, risk of loss, and other details are governed by our complete Shipping Policy. In the event of any conflict, the full policy governs.








