Description

The Volvo Penta Impeller Kit 21700445 is a complete raw water pump service kit designed to maintain proper cooling system performance in modern Volvo Penta gasoline engines. This kit includes a precision-molded impeller along with sealing components and hardware to ensure reliable water flow and long service life.

The impeller is responsible for circulating seawater through the engine cooling system. Over time, the flexible vanes can wear, harden, or crack, reducing efficiency and increasing the risk of overheating. Replacing the impeller at recommended intervals ensures consistent cooling performance and helps protect your engine from damage.

This kit is commonly used on newer Volvo Penta V8 gasoline engines, making it a critical maintenance item for high-performance sterndrive applications.

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Key Features

• Complete Volvo Penta impeller service kit
• 12-blade flexible rubber impeller
• 5/8″ spline drive hub
• Includes O-rings, cover bolts, and lock washers
• Maintains proper raw water flow and cooling performance
• OEM fit and function

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Engine Compatibility

Volvo Penta Engine Series

V8 Gasoline Engines (2012+)

• V8-350-C-D
• V8-350-CE-D
• V8-380-C-A / C-B / C-D
• V8-380-CE-A / CE-D
• V8-430-CE-D

General Applications

• 3.0L
• 4.3L
• 5.0L
• 5.7L
• 8.1L

Fits engines equipped with compatible raw water pump mounting configurations.

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Serial Number Fitment Notice

Fitment depends on:

• Engine model and variant
• Pump mounting style
• Engine serial number

Always confirm compatibility using your engine serial number before ordering.

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Impeller Specifications

• Diameter: 2-1/4″
• Width: 1-7/8″
• Shaft: 5/8″ spline drive
• 12-blade flexible impeller design

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What’s Included in the Kit

• Impeller
• Pump cover O-ring
• Additional O-rings
• Cover bolts
• Lock washers

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When This Part Needs Replacement

Replace the impeller if you notice:

• Reduced or no cooling water flow
• Engine overheating
• Cracked, missing, or stiff vanes
• After seasonal storage

Recommended service interval: every 100 hours or annually

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Installation Notes

• Lubricate impeller before installation
• Install with correct vane direction
• Replace all O-rings and hardware included
• Inspect pump housing and wear surfaces
• Use Volvo impeller puller tool if needed

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Alternate / Superseded Part Numbers

OEM Cross References

• Volvo Penta: 21700445

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Service Tools

• Volvo Penta Impeller Puller: 3843948, 3045348

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Shipping

Shipping: Ships same or next day for fast Canada wide shipping.

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Parts Desk Insight

These newer Volvo V8 impellers use a splined hub and higher blade count to move more water at higher RPM. If cooling drops off under load, this is usually the first place to look.

Using the correct puller tool makes removal much easier and helps prevent damage during service