Description:
Get the ACDelco 251-644 Engine Water Pump for your vehicle. Buy now and secure your purchase online!
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 - https://www.P65Warnings.ca.gov
Features and Benefits:
- Coated seals with a stainless steel spring for durability
- GM-recommended replacement part for your GM vehicle's original factory component
- Manufactured to GM OE specification for fit, form, and function
- Offering the quality, reliability, and durability of GM OE
- Thoroughly tested for reliable, leak-resistant performance
- Uniform wall sections and smooth coolant-flow cavities for efficient operation
Specifications:
Housing Material:
Aluminum
Hub Flange Mount Hole Quantity:
0
Impeller Rotation:
Standard
Impeller Vane Quantity:
5
Includes Back Housing:
No
Includes Thermostat and Housing:
No
Mounting Hardware Included:
No
Pump Mount Hole Quantity:
5
Related Cooling Fan Components:
None
Water Pump Drive Type:
Gear
Features and Benefits:
- – 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.
- – After installation, pressure-test the system for leaks and check for sufficient fan blade clearance between the blade and radiator shroud.
- – Clean all excess dirt and debris from the water pump housing.
- – Clean all sealing surfaces, and make sure all old gasket material is removed before installing your replacement component.
- – Clean and reinstall the coolant recovery reservoir before flushing the cooling system.
- – Do not use any non-approved flush agents and replace the coolant according to manufacturer's specifications.
- – 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.
- – Inspect for leakage at the water pump outlet housing or the rear cover gasket, and leakage at the water pump vent or weep hole.
- – Inspect related components in the cooling system, including your fan blades, fan clutch, engine mounts, radiator, belts and hoses, and reservoir.
- – Never strike the water pump shaft, since this will damage the new water pump.
- – Run your vehicle to increase engine temperature, and ensure the system is pressurized.
- – Torque all bolts according to the manufacturer's specifications and adjust belts to proper tension (if applicable) to manufacturer's specifications.
- – Use sealant tabs only if recommended. Some sealant tabs or similar compounds may restrict coolant flow through the passages of some cooling systems.
- – With the new pump installed, turn the hub by hand and check for rotation.
- Before purchasing and installing an engine water pump, make sure it is the correct fit for your vehicle.
- Tips for Water Pump Inspection:
- Tips for Water Pump Servicing & Installation:
Specifications:
