Cylinder Head Gasket – Fits Volvo Penta AQ165/AQ170/BB165/BB170 Series (Replaces 9139284, 3855409)
Cylinder Head Gasket – Fits Volvo Penta AQ165/AQ170/BB165/BB170 Series (Replaces 9139284, 3855409) 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
Cylinder Head Gasket – Fits Volvo Penta AQ165/AQ170/BB165/BB170 Ser...
Product Details
This replacement Cylinder Head Gasket is engineered for the Volvo Penta B30 gasoline engine series used in AQ165, AQ170, BB165, and BB170 models manufactured between 1965 and 1978. It ensures a high-compression seal between the cylinder head and the engine block.
It serves as a direct interchange for Volvo Penta part numbers 9139284, 3855409, 461056, 430107, and 461618, as well as aftermarket equivalents like Orbitrade 13008 and Sierra 18-2811.
- Designed to prevent oil and coolant leaks into the cylinders.
- Installs between the engine block and cylinder head.
- Specifically for gasoline-fueled 4-stroke marine engines.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Volvo Penta | 9139284 | Primary OEM Number |
| Volvo Penta | 3855409 | Supersedes 9139284 |
| Volvo Penta | 461056 | |
| Volvo Penta | 430107 | |
| Volvo Penta | 461618 | |
| Orbitrade | 13008 | Aftermarket Interchange |
| Sierra | 18-2811 | Aftermarket Interchange |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Volvo Penta | AQ165A | 165 | 4-Stroke | 1968–1969 | 9139284 | |
| Volvo Penta | AQ170A | 170 | 4-Stroke | 1969–1972 | 9139284 | |
| Volvo Penta | AQ170B | 170 | 4-Stroke | 1972–1973 | 9139284 | |
| Volvo Penta | AQ170C | 170 | 4-Stroke | 1973–1978 | 3855409 | Superseded 9139284 |
| Volvo Penta | BB165A | 165 | 4-Stroke | 1965–1969 | 9139284 | |
| Volvo Penta | BB170A | 170 | 4-Stroke | 1969–1972 | 9139284 | |
| Volvo Penta | BB170B | 170 | 4-Stroke | 1972–1973 | 9139284 | |
| Volvo Penta | BB170C | 170 | 4-Stroke | 1973–1978 | 3855409 | Superseded 9139284 |
| Volvo Penta | B30 (0.8mm) | - | 4-Stroke | - | 9139284 | Base engine |
Technical Specs
- Product Type
- Cylinder Head Gasket
- Installation Location
- Between engine block and cylinder head
- Fuel Type
- Gasoline
- Thickness
- 0.8 mm
- Product Dimensions
- 67.5 cm x 18.0 cm x 0.5 cm (L x W x H)
- Technical Design
- Designed for maximum compression and to prevent oil/coolant leaks into cylinders
What’s in the Box
- 1 x Cylinder Head Gasket
Installation Notes
- Disconnect the battery and completely drain the engine's cooling system.
- Remove components obstructing the cylinder head, such as the intake/exhaust manifolds and valve cover.
- Loosen and remove the cylinder head bolts following the reverse of the manufacturer's specified tightening sequence.
- Carefully lift the cylinder head off the engine block. Avoid using pry tools that could damage the mating surfaces.
- Thoroughly clean all old gasket material from both the cylinder head and engine block surfaces. A plastic scraper is recommended.
- Position the new head gasket on the engine block, ensuring it aligns with all dowels and bolt holes.
- Carefully lower the cylinder head onto the new gasket.
- Install new or inspected cylinder head bolts and tighten them in stages, following the torque sequence and values specified in your official service manual.
- Reinstall all previously removed components.
- Refill the cooling system, reconnect the battery, and start the engine. Check carefully for any fluid leaks or unusual operation.
Troubleshooting & FAQ
How do I know if this gasket fits my engine?
This gasket is designed for Volvo Penta B30 series engines from 1965–1978, including the AQ165, AQ170, BB165, and BB170 models. Please cross-reference the OEM part numbers (e.g., 9139284, 3855409) and check the detailed compatibility table on this page.
What are the signs of a failed cylinder head gasket?
Common symptoms include engine overheating, loss of power, white smoke from the exhaust (coolant burning), milky or frothy engine oil (coolant mixing with oil), or external coolant/oil leaks from the seam between the cylinder head and block.
Is any sealant required with this gasket?
Generally, this type of gasket is designed to be installed dry. Always follow the specific instructions in your engine's service manual. Applying sealants can sometimes interfere with proper sealing unless explicitly required.
What is the difference between part number 9139284 and 3855409?
Part number 3855409 superseded the original 9139284 for later model years (typically 1973–1978). This gasket is a direct replacement for both, maintaining the required 0.8mm thickness and material specifications for all listed models.
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.
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