Chevy Big Block 348/409 High-Flow Mechanical Water Pump - Satin

• High-volume pump flow helps circulate coolant more efficiently through the radiator and engine passages

• 5.500 in. hub height and 0.625 in. pilot diameter help maintain proper pulley alignment and belt tracking

• 8-vane clockwise impeller design helps maintain steady coolant movement at varying engine speeds

• Satin Aluminum housing finish adds corrosion resistance with a cleaner performance appearance

This Chevy 348/409 W-Series High-Flow Mechanical Water Pump is designed for Chevrolet Big Block Gen I "W" engines. Featuring a high-volume 8-vane anti-cavitation impeller and lightweight aluminum housing, it helps improve coolant circulation while maintaining compatibility with 348 and 409 accessory drive systems.

Pulley Alignment
5.500 in. hub height and 0.625 in. pilot diameter help position the pulley and fan drive during installation.

Impeller & Flow Design
The 8-vane clockwise high-volume impeller setup helps move coolant steadily through the block, heads, and radiator circuit.

Installation Notes
Confirm gasket included: yes, mounting hardware included: no, back housing included: yes before final assembly.

What applications is this water pump compatible with?
This water pump is commonly used on Chevrolet passenger cars, restorations, street rods, and performance builds equipped with 348 or 409 W-Series engines. Verify pulley alignment and accessory-drive compatibility before installation.

Will this water pump fit my engine?
This water pump is designed specifically for Chevrolet W-Series 348 and 409 V8 engines. It is not intended for later Chevrolet Mark IV big block engines such as the 396, 402, 427, or 454. Verify your engine family before ordering.

What does a water pump do?
A water pump circulates coolant through the engine and radiator to help maintain proper operating temperature.

What material is this water pump made from?
This water pump is made from aluminum, which helps with durability and heat dissipation.

What type of impeller does this water pump use?
This water pump features an 8-vane cast aluminum anti-cavitation impeller designed to improve coolant flow and help reduce cavitation compared to many stock water pump designs. The pump flows approximately 40% more than stock applications.

Does this water pump include a gasket?
Yes, this water pump includes a gasket for installation.

Is this water pump suitable for performance applications?
Yes, this water pump is designed to support performance and upgraded cooling systems.

Will this water pump help prevent overheating?
Yes, a properly functioning performance water pump can improve coolant circulation and help reduce overheating.

Is this a good upgrade from a stock water pump?
Yes, this water pump is a strong upgrade for improving cooling efficiency and reliability.

Do I need to verify rotation before installation?
Yes, water pump rotation must match your belt drive system to ensure proper coolant flow.

Can this water pump be used with aftermarket radiators?
Yes, this pump can be used with upgraded cooling systems when properly matched to the engine setup.

Does this fit a 396, 402, 427, or 454 Big Block?
No. This water pump is designed specifically for Chevrolet W-Series 348 and 409 engines. It is not compatible with later Mark IV big block engines such as the 396, 402, 427, or 454.