Volvo Penta Impeller Kit 21700445
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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.
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
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.
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.
Impeller Specifications
- Diameter: ~2-1/4"
- Width: ~1-7/8"
- Shaft: 5/8" spline drive
- 12-blade flexible impeller design
What's Included in the Kit
- Impeller
- Pump cover O-ring
- Additional O-rings
- Cover bolts
- Lock washers
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
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
Alternate / Superseded Part Numbers
OEM Cross References
- Volvo Penta: 21700445
Service Tools
- Volvo Penta Impeller Puller: 3843948, 3045348
Shipping
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
💡 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 👍
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.