Volvo Penta 22307636 Raw Water Pump Impeller Kit — D9 / D11 / D12 Diesel

Volvo Penta 22307636 — Raw Water Pump Impeller Kit | D9 / D11 / D12 Diesel

Part Number: 22307636
Brand: Volvo Penta
Official Product Type: Raw Water Pump Impeller Service Kit
Supersedes: No known superseded number
Replaced By: 22307636 is the current active part number

The Volvo Penta 22307636 is a genuine OEM raw water pump impeller kit for D-series diesel engines. It includes everything needed for a complete impeller service in a single kit — impeller, pump cover gasket, O-ring, and installation lubricant. The raw water impeller is the heart of the engine’s cooling circuit: it draws seawater through the heat exchanger to keep the engine at operating temperature. Replacing it on schedule is one of the most important routine maintenance tasks on any raw-water-cooled diesel.

Engine Family

Volvo Penta D-Series heavy-duty marine diesel — high-capacity seawater pump configuration.

Compatible Applications

• Volvo Penta D9 Series
• Volvo Penta D11 Series
• Volvo Penta D12 Series

Fitment must be confirmed by engine serial number and pump configuration before ordering. This impeller kit spans multiple D-series platforms — confirm the correct pump assembly for your specific engine.

System & Location

Raw water (seawater) cooling system — raw water pump. The impeller sits inside the raw water pump housing and is driven by the engine to circulate seawater through the cooling circuit. It is a wear item that requires periodic replacement regardless of visible condition.

Kit Contents

• 1× Flexible rubber impeller (multi-blade, high-flow design)
• 1× Pump cover gasket
• 1× O-ring / sealing components
• 1× Installation lubricant

Dimensions & Weight

• Weight: Approx. 400 g / 0.88 lb
• Impeller dimensions match OEM Volvo Penta pump housing specifications for D9/D11/D12

Service Interval

Replace every 300 hours or annually, whichever comes first — or sooner if any of the following are observed:

• Reduced or absent cooling water flow from the exhaust
• Engine temperature running higher than normal
• Cracked, stiff, or missing impeller vanes
• After any period of dry running
• Following extended storage where the impeller may have taken a set

Always check Volvo Penta’s published maintenance schedule for your specific engine model — interval requirements may vary.

Cross-Reference Numbers

• Volvo Penta OEM: 22307636
• Johnson Pump: 09-1027B-1 (verify application)
• Sierra: 18-3151 (verify fitment)

Installation Notes

• Confirm fitment by engine serial number and pump assembly before installation
• Lubricate the impeller with the included lubricant or a compatible glycerin-based lubricant before installation — never install dry
• Install with correct vane rotation direction — refer to the pump service manual for your engine
• Replace all gaskets and O-rings included in the kit — do not reuse old seals
• Inspect the pump housing and wear plate for scoring or damage before reassembly
• After installation, check the raw water circuit for any broken vane debris that may have migrated downstream — debris in the heat exchanger or thermostat housing can cause overheating
• Run the engine and confirm cooling water flow from the exhaust before returning to service

Technical FAQ

Q: How do I know when the impeller needs replacing?
Replace on schedule regardless of appearance — impeller vanes can look intact but have lost flexibility, reducing flow at higher RPM. Visible cracks, missing vanes, or stiffness are signs of overdue replacement. If vanes are missing, inspect the entire raw water circuit for debris.

Q: What happens if I run the engine with a failed impeller?
A failed impeller stops raw water flow, causing rapid overheating. On high-output diesel engines like the D9/D11/D12, overheating can cause serious damage to the heat exchanger, cylinder head, and other cooling system components within minutes.

Q: Can I use an aftermarket impeller instead of OEM?
Aftermarket options (Sierra 18-3151, Johnson 09-1027B-1) are available and may fit — verify application before ordering. OEM is the safest choice for confirmed fitment and material specification on high-output engines.

Q: Do I need to replace the gasket and O-ring every time?
Yes. Reusing old seals risks leaks at the pump cover. The kit includes all sealing components — replace them as a set during every impeller service.

Related Parts

• Volvo Penta 22222936 — Raw Water Pump Impeller Kit

Parts Desk Insights

The impeller is the single most commonly deferred maintenance item on raw-water-cooled diesel engines — and one of the most consequential to skip. On D9/D11/D12 platforms, the raw water pump works hard under load, and a worn impeller that still moves water at idle can fail to keep up at cruising RPM. The most common issue we see is customers discovering a failed impeller after an overheating event rather than during routine service. If vanes are missing when you pull the old impeller, trace every piece of debris through the raw water circuit before reassembling — a vane lodged in the heat exchanger or thermostat housing will cause the next overheat. Annual replacement is the right call for any engine in regular use.