Water Pump Gasket – Fits Volvo Penta Marine Engines (Replaces 1378906)
Water Pump Gasket – Fits Volvo Penta Marine Engines (Replaces 1378906) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Water Pump Gasket – Fits Volvo Penta Marine Engines (Replaces 1378906)
Product Details
This high-quality aftermarket Water Pump Gasket is engineered to create a reliable seal for the water pump on various Volvo Penta marine engines. It is designed as a direct-fit replacement for models including AQ115, AQ120, AQ125, AQ130, AQ131, AQ140, AQ145, AQ151, and AQ170 series engines, ensuring proper cooling system function.
It serves as a direct interchange for Volvo Penta part number 1378906 (which supersedes 463431) and Sierra Marine 18-2979.
- Engineered for direct-fit installation.
- Designed for marine engine water pump applications.
- Constructed from durable composite materials to withstand the marine environment.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Volvo Penta | 1378906 | Supersedes 463431 |
| Sierra Marine | 18-2979 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Volvo Penta | AQ115, AQ120, AQ140 | Various | 4-Stroke | 1378906 | Used with circulation pump 3587508 |
| Volvo Penta | AQ125, AQ131, AQ151, AQ170 | Various | 4-Stroke | 1378906 | |
| Volvo Penta | Various Marine Engines | Various | 4-Stroke | 1378906 | Supersedes 463431 |
Technical Specs
- Product Type
- Water Pump Gasket
- Installation
- Direct Fit
- Material
- Paper/Composite
- Application
- Marine Engine Water Pump
- Dimensions
- 15.0" L x 13.0" W x 1.0" H
- OEM Number
- 1378906 (supersedes 463431)
- Package Type
- Single Gasket
What’s in the Box
- 1 x Water Pump Gasket (1378906)
Installation Notes
- Disconnect the battery and ensure the engine is cool. Drain the engine's cooling system completely.
- Locate and remove the water pump assembly, taking care to note the position of all bolts and fittings.
- Remove the old gasket and thoroughly clean both mounting surfaces on the engine block and the pump. Ensure they are free of old gasket material, sealant, and debris.
- Position the new gasket correctly on the pump or engine block. Do not use sealant unless specified by the engine manufacturer.
- Carefully reinstall the water pump, tightening the bolts in a star pattern to the torque specified in your service manual.
- Reconnect all hoses, refill the cooling system with the appropriate coolant, and reconnect the battery.
- Start the engine and carefully check for any leaks around the gasket and pump housing.
Troubleshooting & FAQ
How do I know if this gasket fits my engine?
This gasket is designed for a range of Volvo Penta engines, including the AQ115, AQ120, AQ140, AQ125, AQ131, AQ151, and AQ170 series. The best way to confirm fitment is to cross-reference your existing part number with the ones listed in our Part Number Matrix (Volvo Penta 1378906, Sierra 18-2979).
What are the signs of a failing water pump gasket?
Common signs include visible coolant leaks from the area where the water pump mounts to the engine, engine overheating, or a low coolant level warning without an obvious hose leak. A visual inspection may reveal staining or dried coolant residue around the pump's base.
Is this a gasket for the raw water pump or the circulation pump?
This gasket is specified for use with the engine's circulation pump, such as Volvo Penta's 3587508. Always verify against your specific engine diagram and part numbers, as configurations can vary.
How often should this gasket be replaced?
It is best practice to replace the water pump gasket whenever the water pump itself is serviced or replaced. There is no fixed interval, but it should be inspected for leaks during routine engine maintenance.
Can I reuse my old gasket?
No. Gaskets are single-use components that compress to create a seal. Reusing an old gasket will almost certainly result in leaks and potential engine damage from overheating.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
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