Cylinder Head Gasket – Fits Volvo Penta MD7A/MD7B Marine Diesel Engines (Replaces 3809167, 840270, 840910)
Cylinder Head Gasket – Fits Volvo Penta MD7A/MD7B Marine Diesel Engines (Replaces 3809167, 840270, 840910) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Product Details
This is a high-quality aftermarket Cylinder Head Gasket designed to fit Volvo Penta MD7A and MD7B marine diesel engines manufactured between 1976 and 1983. It is specifically for engines with serial numbers starting from 35145.
This gasket serves as a direct replacement for Volvo Penta part numbers 3809167, 840270, and 840910, along with their subsequent supersessions.
- Installation Type: Direct replacement
- Engine Fuel Type: Diesel
- Gasket Thickness: 0.8 mm
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Superseded By |
|---|---|---|
| Volvo Penta | 840270 | 3809167 |
| Volvo Penta | 840910 | 3809167 |
| Volvo Penta | 3809167 | 859136 |
| Volvo Penta | 859136 | 860749 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Volvo Penta engines, check that your model and serial number match the compatibility notes.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Volvo Penta | MD7A | 13.4 | 4-Stroke | 1976–1981 | 3809167 | Starting from engine no. 35145 |
| Volvo Penta | MD7B | 13.4 | 4-Stroke | 1981–1983 | 3809167 | Starting from engine no. 35145 |
Technical Specs
- Product Type
- Cylinder Head Gasket
- Installation
- Direct replacement
- Fuel Type
- Diesel
- Dimensions
- 23.0 x 18.5 x 0.4
- Thickness
- 0.8 mm
- Other Technical Attributes
- For engines with serial numbers starting from 35145 (MD7A/B)
What’s in the Box
- 1 x Cylinder Head Gasket (Replaces 3809167/859136/860749)
Installation Notes
- Disconnect the battery and completely drain the engine's cooling system.
- Remove any components obstructing access to the cylinder head, such as the intake and exhaust manifolds.
- Loosen and remove the cylinder head bolts following the sequence specified in your engine's service manual to prevent warping.
- Carefully lift the cylinder head straight up off the engine block. Do not pry between the two surfaces.
- Remove the old head gasket and thoroughly clean both the cylinder head and engine block mating surfaces.
- Ensure both surfaces are completely clean, dry, and free of any old gasket material, oil, or debris.
- Position the new gasket on the engine block, confirming its correct orientation.
- Carefully lower the cylinder head back into place over the dowel pins.
- Install and tighten the head bolts to the manufacturer's specified torque and sequence. This is critical for a proper seal.
- Reinstall all previously removed components, refill the cooling system, and reconnect the battery before starting the engine.
Troubleshooting & FAQ
How do I know if this gasket fits my engine?
This gasket is specifically for Volvo Penta MD7A and MD7B engines with serial numbers starting from 35145. Please verify your engine model and serial number before ordering.
What are the signs of a failed cylinder head gasket?
Common symptoms include engine overheating, white smoke from the exhaust (burning coolant), milky or foamy engine oil (oil mixing with coolant), loss of compression, and poor engine performance.
Is any sealant required during installation?
Generally, modern head gaskets like this one are designed to be installed dry without any additional sealants. Always follow the specific instructions in your engine's service manual for best results.
When should a head gasket be replaced?
A cylinder head gasket is not a routine maintenance item. It is typically replaced only when it fails or during a major engine overhaul.
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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