Cylinder Head Gasket – Fits Volvo Penta D2-40 (Replaces 21192973/21192974)
Cylinder Head Gasket – Fits Volvo Penta D2-40 (Replaces 21192973/21192974) is backordered and will ship as soon as it is back in stock.
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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.).
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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 D2-40 (Replaces 21192973/21...
Product Details
This is a high-quality aftermarket Cylinder Head Gasket – Fits Volvo Penta D2-40 series diesel engines, including models D2-40A, D2-40B, and D2-40F manufactured between 2005 and 2015. It is engineered for 1.5–2.0L, 39–40HP, 4-stroke marine diesel engines, providing a reliable seal for optimal engine performance.
This part is a direct replacement for Volvo Penta part numbers 21192973 (1.2mm thickness) and 21192974 (1.3mm thickness). It also supersedes part number 3840843.
- Designed for direct, hassle-free installation.
- Constructed from a durable composite with metal reinforcement for longevity.
- Available in two specific thicknesses (1.2mm or 1.3mm) to match factory requirements.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket suppliers.
| Brand | Part Number | Notes |
|---|---|---|
| Volvo Penta | 21192973 | 1.2mm Thickness |
| Volvo Penta | 21192974 | 1.3mm Thickness |
| Volvo Penta | 3840843 | Superseded part number |
Engine & Model Compatibility
Confirm your engine model and year in the table below to ensure accurate fitment.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Volvo Penta | D2-40A | 40 | 4-Stroke | 2005–2010 | 21192973/21192974 | 21192973 (1.2mm), 21192974 (1.3mm) |
| Volvo Penta | D2-40B | 40 | 4-Stroke | 2009–2014 | 21192973/21192974 | 21192973 (1.2mm), 21192974 (1.3mm) |
| Volvo Penta | D2-40F | 39 | 4-Stroke | 2011–2015 | 21192973/21192974 | 21192973 (1.2mm), 21192974 (1.3mm) |
Technical Specs
- Product Type
- Cylinder Head Gasket
- Installation
- Direct replacement
- Material
- Composite with metal reinforcement
- Thickness
- 1.2mm (21192973) or 1.3mm (21192974)
- Dimensions
- 36.5 cm (L) x 15.5 cm (W) x 0.1 cm (H)
- Application
- D2-40 Series Marine Diesel Engines
- OEM Replacement
- Yes
What’s in the Box
- 1 x Cylinder Head Gasket (21192973 or 21192974, based on your selection)
Installation Notes
- Ensure the engine is completely cool before starting. Disconnect the battery and relieve any pressure from the cooling system.
- Systematically remove all components mounted to the cylinder head, including intake/exhaust manifolds, fuel lines, and electrical connectors. Label parts for easier reassembly.
- Loosen and remove the head bolts in the reverse order of the manufacturer's torque sequence. Lift the cylinder head clear of the engine block.
- Remove the old head gasket and thoroughly clean both the cylinder head and engine block surfaces. Ensure they are free of any old gasket material, oil, or debris.
- Position the new gasket correctly on the engine block, ensuring all passages align perfectly. Do not use any sealant unless explicitly required by the service manual for your specific engine.
- Carefully lower the cylinder head back into place. Install and tighten the head bolts in the correct sequence and to the torque specifications provided in your engine's service manual.
- Reinstall all other components, reconnect the battery, and refill the cooling system.
Troubleshooting & FAQ
How do I choose between the 1.2mm and 1.3mm thickness options?
The correct thickness depends on your specific engine requirements, often determined by piston protrusion measurements. Always refer to your Volvo Penta service manual or a qualified marine mechanic to determine which part number (21192973 for 1.2mm or 21192974 for 1.3mm) is appropriate for your engine to ensure proper compression and clearance.
What are the common signs of a failed cylinder head gasket?
Symptoms include engine overheating, loss of power, white smoke from the exhaust (indicating coolant is burning), coolant in the oil (milky appearance), or oil in the coolant. If you notice any of these signs, it is critical to have your engine inspected immediately.
Is this gasket compatible with all D2-40 engine variants?
This gasket is designed specifically for the D2-40A, D2-40B, and D2-40F models. Always verify your full engine model and serial number against the compatibility table. If you are unsure, contact us with your engine details before purchasing.
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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