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

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
5/8 In. pilot diameter help position the pulley and fan drive during installation.

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

Installation Notes
Confirm gasket requirements, pulley alignment, and hose routing before final assembly.

COMPATIBLE WITH
CHEVROLET BIG BLOCK V8 GEN. I (W)
• 5.7 L / 348 in3
• 6.7 L / 409 in3

SPECIFICATIONS
Pump Flow: High-Volume
Pump Material: Aluminum
Pump Rotation: Clockwise
Pilot Diameter: 5/8 In.
Crank Hub Thickness: 1/2 In.
Gaskets: Included
Finish: Polished