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BrandACDELCO
Housing MaterialAluminum
Mounting Hole Quantity6
Water Pump Drive TypeSerpentine Belt
Includes Back HousingNo
Good Maintenance Practices - Section 1 - Bullet 1Clean all excess dirt and debris from the water pump housing.
Good Maintenance Practices - Section 1 - Bullet 4A 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 3 - HeaderTips to Help Prevent Water Pump Failure:
Good Maintenance Practices - Section 1 - Bullet 2Run your vehicle to increase engine temperature, and ensure the system is pressurized.
Good Maintenance Practices - Section 1 - Bullet 3Inspect for leakage at the water pump outlet housing or the rear cover gasket, and leakage at the water pump vent or weep hole.
Thermostat And Housing IncludedNo
Product DescriptionGM Genuine Parts Engine Water Pump Kits are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These kits contain a GM Genuine water pump and necessary installation hardware. 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). ⚠<b> WARNING:</b> Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Pulley IncludedYes
Installation WarningsNo
Volume (Cu In)152.3438cu in
Fan Clutch IncludedNo
Width (In)14.55
Impeller RotationStandard
Impeller MaterialSteel
Length (In)8.8
Good Maintenance Practices - Section 2 - Bullet 3Do not use any non-approved flush agents, and replace the coolant according to manufacturer's specifications.
Good Maintenance Practices - Section 2 - Bullet 4Clean all sealing surfaces, and make sure all old gasket material is removed before installing your replacement component.
Good Maintenance Practices - Section 2 - Bullet 5Never strike the water pump shaft, since this will damage the new water pump.
Good Maintenance Practices - Section 2 - Bullet 6Torque all bolts according to the manufacturer's specifications, and adjust belts to proper tension (if applicable) to manufacturer's specifications.
Good Maintenance Practices - Section 2 - Bullet 1Clean and reinstall the coolant recovery reservoir before flushing the cooling system.
Good Maintenance Practices - Section 2 - Bullet 2Flush 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 2 - HeaderTips for Water Pump Servicing & Installation:
Signs Of Wear &#38; Troubleshooting - Section 1 - Bullet 1Leaking 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.
Faq - Answer 5No. 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 - Answer 4Yes. 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 3Yes. 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 2No. Water pumps can vary greatly in size and appearance depending on the vehicle they are designed for.
Impeller Vane Quantity6
Faq - Answer 1Yes. ACDelco GM Original Equipment parts are equivalent to your GM vehicle's original factory components.
Features &#38; Benefits - Bullet 6GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors.
Features &#38; Benefits - Bullet 7GM engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
Features &#38; Benefits - Bullet 8GM regularly updates production and service part designs to integrate new materials and technologies
Features &#38; Benefits - Bullet 2Uniform wall sections and smooth coolant-flow cavities for efficient operation
Features &#38; Benefits - Bullet 3Coated seals with a stainless steel spring for durability
Features &#38; Benefits - Bullet 4Heat-treated impeller shafts supported by high-quality ball/roller bearings for smooth, reliable operation in virtually all conditions
Features &#38; Benefits - Bullet 5Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
Hub Height (In)1.53
Features &#38; Benefits - Bullet 1Thoroughly tested for reliable, leak-free performance
Related Cooling Fan ComponentsNo
Good Maintenance Practices - Section 1 - HeaderTips for Water Pump Inspection:
Mounting Hardware IncludedNo
Pulley Outside Diameter (In)6.339in
Good Maintenance Practices - Section 3 - Bullet 5Ensure that your engine fan pulley (or clutch, if used) is seated properly on the pump's shaft. If the fan wobbles during rotation, vibration resulting in premature bearing wear may occur. Also check the fan clutch for wear and replace as necessary.
Good Maintenance Practices - Section 3 - Bullet 4Inspect the fan blade. If damage is not detected, bent blades, loose rivets, and cracks may result in premature bearing failure. If damage is found, do not try to repair the fan-the part should be replaced.
Height (In)3.65
Pulley Outside Diameter (Mm)161mm
Good Maintenance Practices - Section 3 - Bullet 6Inspect the thermostat and radiator cap. Examine your thermostat and radiator cap, and replace if they show signs of sticking or leaking.
Faq - Question 5Does the water pump work when my vehicle is turned off?
Signs Of Wear &#38; Troubleshooting - Section 1 - Bullet 2Engine 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.
Good Maintenance Practices - Section 3 - Bullet 1Flush your cooling system whenever the water pump or other system components are replaced. This will help prevent contamination from entering the system, which may result in repeated failure.
Signs Of Wear &#38; Troubleshooting - Section 1 - Bullet 3Rumbling 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 &#38; Troubleshooting - Section 1 - Bullet 4Visible 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.
Good Maintenance Practices - Section 3 - Bullet 3Never overtighten your drive belts. Belts that are too tight may cause an overload on pump bearings, greatly reducing the life of the water pump.
Good Maintenance Practices - Section 3 - Bullet 2Utilize quality coolant when refilling your cooling system with the recommended 50/50 coolant/water mix. Distilled water should be used, as hard tap water can leave mineral deposits in the cooling system and reduce coolant flow, or result in corrosion and seal damage. Contaminated or depleted coolant can also result in corrosion and seal damage, and lead to pump failure. Take care to select the correct coolant for your vehicle by consulting the vehicle manufacturer's service information.
Hub Height (Mm)38.86
Good Maintenance Practices - Section 2 - Bullet 7Use sealant tabs only if recommended. Some sealant tabs or similar compounds may restrict coolant flow through the passages of some cooling systems.
Faq - Question 4Does the water pump affect the temperature inside the passenger compartment of my vehicle?
Good Maintenance Practices - Section 2 - Bullet 8With the new pump installed, turn the hub by hand and check for rotation.
Faq - Question 3Can a malfunctioning water pump harm my engine?
Weight (Lb)6.93
Grade TypeOE
Good Maintenance Practices - Section 2 - Bullet 9After installation, pressure-test the system for leaks and check for sufficient fan blade clearance between the blade and radiator shroud.
Good Maintenance Practices - Section 2 - Bullet 10Inspect related components in the cooling system, including your fan blades, fan clutch, engine mounts, radiator, belts and hoses, and reservoir.
Faq - Question 2Do all water pumps look the same?
Faq - Question 1Will ACDelco GM Original Equipment Water Pumps, Kits and other components match the quality of my GM vehicle's original factory parts?
Vendor Part Number251-820
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
