Shop Parts & Accessories

Shop Aftermarket

Shop Clearance

Water Pump O-Ring - ACDelco (251-2053)

2000-2017 ACDelco - 251-2053

Not for Sale

No Longer Available For Purchase

Review Fitment & Product Details

Details

  • Brand:

     Parts

  • SKU:

    251-2053

  • GTIN: 00707773849545
  • UPC: 707773849545
  • Other Names:

    24439799

  • Description: GM Genuine Parts Engine Water Pump O-Rings are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These o-rings are used in some applications instead of paper or composite gaskets to seal the water pump housing. The interface between components will have a machined groove to accept the O-ring. The O-ring is slightly compressed when assembled to provide a liquid-tight seal, keeping engine coolant in and air and dirt out. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE). ⚠ WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
  • Condition: New

Not for Sale

No Longer Available For Purchase

Pricing is valid online only and may vary in your local store

Manufacturer Warranty Minimum of 12 Months
Guaranteed Fitment ALWAYS - When VIN is provided
Shop with Confidence Your information is safe
In-House Experts We know our products

Vehicle Fitment

Vehicle Fitment

No application/vehicle fitment information available for this product
Vehicle Fitment
Year Make Model Body & Trim Engine & Transmission
( more fitments)
No fitment data available

Key Product Information

Additional Information

Brand GM Genuine Parts
FAQ - Answer 1 Yes. Always consult the Vehicle Owner's manual or an expert technician before making any repairs or adjustments
FAQ - Answer 2 Yes. ACDelco GM Original Equipment parts are equivalent to your GM vehicle's original factory components.
FAQ - Answer 3 No. Water pumps can vary greatly in size and appearance depending on the vehicle they are designed for.
FAQ - Answer 4 Yes. The water pump is responsible for moving coolant through your vehicle's cooling system, keeping the heat generated by your engine at acceptable levels, and helping prevent overheating. A malfunctioning water pump can cause your engine to overheat, which may result in severe and costly engine damage.
FAQ - Answer 5 Yes. As part of regular cooling system operation, the water pump sends hot coolant to the heater core of your engine, which transfers heat into the passenger cabin of your vehicle. If this hot coolant is unable to reach the heater core, then this heat transfer cannot occur, and your passenger compartment remains colder than you want.
FAQ - Answer 6 No. Your vehicle's water pump keeps coolant moving as long as the engine is running and stops when the engine is turned off. If you want to be able to circulate coolant for a short time after the engine has been turned off, an auxiliary electric water pump is needed.
FAQ - Question 1 Should the Vehicle Owner's manual or an expert technician be consulted before making any repairs or adjustments?
FAQ - Question 2 Will ACDelco GM Original Equipment Water Pumps, Kits and other components match the quality of my GM vehicle's original factory parts?
FAQ - Question 3 Do all water pumps look the same?
FAQ - Question 4 Can a malfunctioning water pump harm my engine?
FAQ - Question 5 Does the water pump affect the temperature inside the passenger compartment of my vehicle?
FAQ - Question 6 Does the water pump work when my vehicle is turned off?
Features & Benefits - Bullet 1 Made from some heat and chemical-resistant materials
Features & Benefits - Bullet 2 Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
Features & Benefits - Bullet 3 GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
Features & Benefits - Bullet 4 GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
Features & Benefits - Bullet 5 GM regularly updates production and service part designs to integrate new materials and technologies
Good Maintenance Practices - Section 1 - Header Before purchasing and installing an engine water pump housing gasket, make sure it is the correct fit for your vehicle.
Good Maintenance Practices - Section 2 - Bullet 1 Clean all excess dirt and debris from the water pump housing.
Good Maintenance Practices - Section 2 - Bullet 2 Run your vehicle to increase engine temperature, and ensure the system is pressurized.
Good Maintenance Practices - Section 2 - Bullet 3 Inspect for leakage at the water pump outlet housing or the rear cover gasket, and leakage at the water pump vent or weep hole.
Good Maintenance Practices - Section 2 - Bullet 4 A stain around the weep hole is acceptable. However, if a weep occurs with the engine running and the coolant system pressurized, then the water pump should be replaced.
Good Maintenance Practices - Section 2 - Header Tips for Water Pump Inspection:
Good Maintenance Practices - Section 3 - Bullet 1 Clean and reinstall the coolant recovery reservoir before flushing the cooling system.
Good Maintenance Practices - Section 3 - Bullet 10 Inspect related components in the cooling system, including your fan blades, fan clutch, engine mounts, radiator, belts and hoses, and reservoir.
Good Maintenance Practices - Section 3 - Bullet 2 Flush the cooling system completely, using power flush equipment or thermal cycling the system with clean water three times. The most effective method of system flushing is to use a coolant exchanger, following the manufacturer's operating instructions.
Good Maintenance Practices - Section 3 - Bullet 3 Do not use any non-approved flush agents and replace the coolant according to manufacturer's specifications.
Good Maintenance Practices - Section 3 - Bullet 4 Clean all sealing surfaces, and make sure all old gasket material is removed before installing your replacement component.
Good Maintenance Practices - Section 3 - Bullet 5 Never strike the water pump shaft, since this will damage the new water pump.
Good Maintenance Practices - Section 3 - Bullet 6 Torque all bolts according to the manufacturer's specifications and adjust belts to proper tension (if applicable) to manufacturer's specifications.
Good Maintenance Practices - Section 3 - Bullet 7 Use sealant tabs only if recommended. Some sealant tabs or similar compounds may restrict coolant flow through the passages of some cooling systems.
Good Maintenance Practices - Section 3 - Bullet 8 With the new pump installed, turn the hub by hand and check for rotation.
Good Maintenance Practices - Section 3 - Bullet 9 After installation, pressure-test the system for leaks and check for sufficient fan blade clearance between the blade and radiator shroud.
Good Maintenance Practices - Section 3 - Header Tips for Water Pump Servicing & Installation:
Height (in) 0.3
Length (in) 5.9
Material Rubber
Maximum Diameter 4.09
103.8
Minimum Diameter 3.9
98.99
Programming Required No
Rim Shape Round
Signs of Wear & Troubleshooting - Section 1 - Bullet 1 Leaking Coolant - Puddles of coolant under your vehicle, a constant drip or stream of coolant from the water pump's weep hole, or a constantly empty or low coolant reservoir are all signs of potential water pump wear, and may be caused by cracks in the pump, or seal or gasket failures.
Signs of Wear & Troubleshooting - Section 1 - Bullet 2 Engine Overheating - If your vehicle's engine overheats, it may not be receiving the required coolant flow. Make sure that your vehicle's cooling system contains the proper level of coolant.
Signs of Wear & Troubleshooting - Section 1 - Bullet 3 Rumbling Noise in the Pump - A rumbling, squeaking, or screeching noise near the front of your vehicle when you start it may indicate a malfunctioning water pump bearing.
Signs of Wear & Troubleshooting - Section 1 - Bullet 4 Visible Component Wear - Worn seals, corrosion, cavitation/pitting of pump components, or a loose or wobbly pump shaft are all signs of wear that may lead to water pump failure and should be addressed.
Signs of Wear & Troubleshooting - Section 1 - Header Signs of wear for engine water pump seals include but are not limited to:
Thickness 0.12
3
Weight (lb) 0.01
Width (in) 5.9

Features and Benefits

Interchange

Interchange

Product Reviews

Product Reviews

Brand

ACDelco

 

 

Store

AutoNationParts.com

Genuine OEM & Premium Aftermarket Replacement Parts Online

Shop high-quality OEM and aftermarket components online at AutoNationParts.com. We provide reliable replacement parts, factory maintenance essentials, and specialized hardware performance upgrades for nearly every major vehicle make and model on the road.

Currently viewing detailed specifications and pricing for Water Pump O-Ring (SKU: 251-2053). You can explore our master catalog of auto parts categories, or jump directly into core high-demand vehicle infrastructure systems below:

With strategic nationwide distribution hubs, orders for Water Pump O-Ring and related catalog items process immediately and ship out in 1–2 business days. Learn more about our fast domestic delivery windows via our shipping policy.


Verifying Fitment for Water Pump O-Ring

To guarantee 100% complete compatibility before checking out, ensure you cross-reference your vehicle's unique 17-digit VIN (Vehicle Identification Number) or enter your exact manufacturer part number. Because automotive engineering frameworks shift across model years and specific engine packages, confirming your mechanical alignment ensures a flawless installation.

Explore related systems in our database: Brake Parts | Filters | Suspension


OEM Performance vs. Premium Aftermarket Alternatives

Whether you choose an OEM (Original Equipment Manufacturer) part or a trusted third-party alternative, AutoNation Parts ensures that your technical hardware fulfills rigorous road-testing and assembly standards.

  • OEM Inventory: Offers exact factory engineering specs, direct electrical or mechanical compatibility, and protects existing manufacturer warranties.
  • Aftermarket Options: Provides highly cost-effective, dependable solutions with wider availability across legacy vehicle models.

Browse our complete catalog pathway: OEM Auto Parts Collection | Aftermarket Alternatives


Fast Nationwide Shipping (1–2 Business Days)

We leverage a robust, interconnected network of regional U.S. fulfillment facilities to route your components via the most efficient transport channels, keeping vehicle downtime to an absolute minimum:

  • Chicago – Midwest logistics hub
  • Atlanta – Southeast distribution network
  • Houston – Central regional fulfillment
  • Los Angeles – West Coast shipping facility
  • Miami – East Coast distribution hub

Learn more: Shipping Information & Logistics Rates


Why Source Your Inventory from AutoNation Parts?

  • Extensive OEM and premium aftermarket parts in one centralized marketplace
  • Fast nationwide shipping with tracking transparency to reduce project downtime
  • Trusted automotive retailer dedicated to component precision and customer support
  • Secure encrypted checkout paired with verified real-time active inventory data
  • Catalog coverage spanning the majority of vehicle model configurations on the road

Shop AutoNation Parts Online Today


OEM & Aftermarket Auto Parts FAQ | AutoNation Parts

What are OEM auto parts?

OEM auto parts are original equipment components manufactured directly by the vehicle factory or licensed suppliers to match your vehicle’s original assembly specifications for an exact fit and flawless performance.

What are aftermarket auto parts?

Aftermarket auto parts are components produced by independent third-party manufacturers. They serve as highly affordable, readily available replacement options or heavy-duty performance upgrades.

How do I ensure Water Pump O-Ring fits my exact vehicle?

The fastest way to guarantee fitment for SKU 251-2053 is to use our advanced Search by Vehicle tool to isolate components by your unique 17-digit VIN, or filter results by selecting your year, make, model, and trim level.

Can I apply promotional discounts to routine maintenance orders?

Yes. For qualifying orders of common maintenance components such as engine filters, cabin air filters, ignition spark plugs, or fluids, you can enter promo code MAINT5SAVE at checkout to apply direct tiered savings.

How fast is shipping for auto parts online?

Most in-stock orders process and depart our distribution centers within 1–2 business days. We utilize multiple domestic regional hubs to route shipments via the most efficient paths possible.

Is it safe to buy auto parts online?

Yes. AutoNation Parts integrates secure checkout protocols, strict data encryption, and fully verified real-time warehouse inventory to make sure your online purchasing experience is secure and dependable.