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- Brand:
- SKU:
251-748
- GTIN: 00707773787533
- UPC: 707773787533
- Other Names:
12637105
- Description: An ACDelco GM Original Equipment Engine Water Pump circulates coolant through your vehicle's radiator and engine system to help maintain proper engine temperature and performance. This original equipment water pump has been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors. ⚠ WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
- Condition: New
- Warranty:
Engine Water Pump Kit - ACDelco (251-748)
- Sale Price: $229.46
- Sale Price: $229.46
Pricing is valid online only and may vary in your local store
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|---|
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Brand
ACDelco
Shop ACDelco Parts Online – Genuine GM Aftermarket Quality
Explore ACDelco, the official General Motors (GM) original equipment and aftermarket parts brand, now available at AutoNation’s Aftermarket Store. Trusted by professional technicians and vehicle owners worldwide, ACDelco offers high-quality parts engineered for reliability, durability, and OE-level performance.
With a full lineup that includes:
-
Starters & alternators
-
Brake pads & rotors
-
Oil filters & air filters
-
Ignition components
-
Suspension & steering parts
…ACDelco ensures a precise fit for GM vehicles and a wide range of non-GM makes and models.
Backed by a 24-month/unlimited-mile limited warranty, ACDelco parts meet rigorous industry standards for quality and performance. When you choose ACDelco at AutoNation Parts, you get genuine aftermarket value — delivered fast and supported by America’s most admired automotive retailer.
Store
aftermarket
AutoNation Aftermarket Parts FAQ & Buying Guide | AutoNation Parts
What is the AutoNation Aftermarket Store?
The AutoNation Aftermarket Store is your trusted source for high-quality aftermarket auto parts and accessories. We offer over 275+ leading brands, delivering reliable components for nearly every make and model on the road today.
What types of aftermarket parts do you offer?
Our inventory includes everything from performance upgrades to essential replacement parts such as brakes, filters, suspension components, lighting, and electronics. Whether you're maintaining or upgrading your vehicle, we have you covered.
How do I find the right part for my vehicle?
Use our Search by Vehicle tool to quickly match parts to your exact make, model, and year. This ensures proper fitment and optimal performance.
Are aftermarket parts reliable?
Yes. We carefully curate our catalog with trusted aftermarket brands known for durability and performance. Many aftermarket parts meet or exceed OEM standards while offering better value.
How fast is shipping?
We offer fast and reliable delivery nationwide. Most orders are processed quickly so you can get back on the road without delays.
Do you offer discounts on aftermarket parts?
Yes. Combine essential maintenance items and apply promo code MAINT5SAVE at checkout when your order reaches $75+ to save on your purchase.
Can I install these parts myself?
Many of our products are perfect for DIY enthusiasts, while others may require professional installation. Always review product details and consult a technician if needed.
What if I order the wrong part?
If a part doesn’t fit, you can review our Returns Policy for easy return or exchange options. We recommend verifying compatibility before purchase.
Why shop with AutoNation Aftermarket?
AutoNation is one of America’s most trusted automotive retailers, with 300+ locations nationwide. We combine competitive pricing, quality assurance, and expert selection to deliver unmatched value.
Do aftermarket parts affect vehicle performance?
High-quality aftermarket parts can enhance performance, efficiency, and durability. Choosing the right components ensures your vehicle operates at its best.
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? |
| Fan Clutch Included | No |
| Features & Benefits - Bullet 1 | Thoroughly tested for reliable, leak-resistant performance |
| Features & Benefits - Bullet 2 | Uniform wall sections and smooth coolant-flow cavities for efficient operation |
| Features & Benefits - Bullet 3 | Coated seals with a stainless steel spring for durability |
| Features & Benefits - Bullet 4 | GM-recommended replacement part for your GM vehicle's original factory component |
| Features & Benefits - Bullet 5 | Offering the quality, reliability, and durability of GM OE |
| Features & Benefits - Bullet 6 | Manufactured to GM OE specification for fit, form, and function |
| Good Maintenance Practices - Section 1 - Header | Before purchasing and installing an engine water pump, 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) | 6.1 |
| Housing Material | Aluminum |
| Hub Height | 68 2.68 |
| Impeller Material | Plastic |
| Impeller Rotation | Standard |
| Includes Back Housing | No |
| Includes Thermostat and Housing | No |
| Installation Warnings | No |
| Length (in) | 9 |
| Mounting Hardware Included | No |
| Mounting Hole Quantity | 6 |
| Outlet Quantity | 1 |
| Programming Required | No |
| Pulley Included | No |
| Related Cooling Fan Components | None |
| 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 heater water pumps include but are not limited to: |
| Thermostat And Housing Included | No |
| Water Pump Drive Type | Gear |
| Weight (lb) | 7.61 |
| Width (in) | 7.7 |