Sealing Ring O-Ring – Fits Volvo Penta Marine Engines (Replaces 416033, 418361, 1317466)
Sealing Ring O-Ring – Fits Volvo Penta Marine Engines (Replaces 416033, 418361, 1317466) 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
Sealing Ring O-Ring – Fits Volvo Penta Marine Engines (Replaces 416...
Product Details
This high-quality elastomeric Sealing Ring O-Ring is engineered for a precise fit in the cooling systems of various Volvo Penta Marine Engines. It is compatible with a wide range of models, including the MD, 2000, AD/AQAD/TAMD, and KAD/KAMD series, ensuring a reliable seal for the thermostat housing.
It serves as a direct replacement for Volvo Penta part numbers 416033, 418361, and 1317466, as well as an interchange for Sierra 18-2933-9.
- Installation: Mounts within the engine's cooling system thermostat housing.
- Material: Constructed from durable black elastomeric rubber for longevity.
- Function: Creates a secure, leak-proof seal for the thermostat.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket suppliers.
| Brand | Part Number | Notes |
|---|---|---|
| Volvo Penta | 416033 | Superseded by 418361, 1317466 |
| Volvo Penta | 418361 | Superseded by 1317466 |
| Volvo Penta | 1317466 | |
| Sierra | 18-2933-9 | Interchange for Volvo Penta 416033 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This part is designed for a wide range of Volvo Penta diesel engines. Please verify your specific model is listed.
| Brand | Model | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|
| Volvo Penta | MD1, MD1B | 4-Stroke | 416033 | Thermostat gasket |
| Volvo Penta | MD2, MD2B | 4-Stroke | 416033 | Thermostat gasket |
| Volvo Penta | MD3, MD3B | 4-Stroke | 416033 | Thermostat gasket |
| Volvo Penta | MD6, MD6A, MD6B | 4-Stroke | 416033 | Thermostat gasket |
| Volvo Penta | MD7, MD7A, MD7B | 4-Stroke | 416033 | Thermostat gasket |
| Volvo Penta | MD11, MD11C, MD11D | 4-Stroke | 416033 | Thermostat gasket |
| Volvo Penta | MD17, MD17C, MD17D | 4-Stroke | 416033 | Thermostat gasket |
| Volvo Penta | 2001, 2001B, 2001AG, 2001BG | 4-Stroke | 416033 | Thermostat gasket |
| Volvo Penta | 2002, 2002B, 2002D, 2002AG, 2002BG | 4-Stroke | 416033 | Thermostat gasket |
| Volvo Penta | 2003, 2003B, 2003D, 2003AG, 2003BG, 2003T | 4-Stroke | 416033 | Thermostat gasket |
| Volvo Penta | AD30, AD31 | 4-Stroke | 416033 | Thermostat gasket |
| Volvo Penta | MD40, AD41 | 4-Stroke | 416033 | Thermostat gasket |
| Volvo Penta | AQAD40 | 4-Stroke | 416033 | Thermostat gasket |
| Volvo Penta | AQD21 | 4-Stroke | 416033 | Thermostat gasket |
| Volvo Penta | D41 | 4-Stroke | 416033 | Thermostat gasket |
| Volvo Penta | KAD32, KAD42, KAD43, KAD44 | 4-Stroke | 416033 | Thermostat gasket |
| Volvo Penta | KAMD42, KAMD43, KAMD44 | 4-Stroke | 416033 | Thermostat gasket |
| Volvo Penta | D70B | 4-Stroke | 416033 | Used in cooling system, key #40 in parts diagram |
Technical Specs
- Product Type
- Sealing Ring / O-Ring
- Installation
- Cooling System
- Housing Material
- Elastomeric (Rubber)
- Housing Color
- Black
- Dimensions
- 10.0" L x 10.0" W x 0.5" H
- Weight
- 0.02 lbs (0.009 kg)
- Warranty
- Manufacturer Standard Warranty
- Other Technical Attributes
- Used in thermostat housing applications
What’s in the Box
- 1 x Sealing Ring (416033/418361/1317466)
Installation Notes
- Ensure the engine is completely cool and disconnect the battery.
- Drain the engine coolant to a level below the thermostat housing.
- Carefully remove the bolts from the thermostat housing cover and lift it away.
- Remove the old, worn sealing ring and thoroughly clean any residue from the housing and cover mating surfaces.
- Seat the new sealing ring correctly in its designated groove.
- Reassemble the thermostat and housing, tightening fasteners to the manufacturer's recommended torque specifications.
- Refill the cooling system with the appropriate coolant type.
- Reconnect the battery, start the engine, and carefully inspect for any leaks as it comes up to operating temperature.
Troubleshooting & FAQ
How do I know if this sealing ring fits my engine?
This ring is designed for a wide variety of Volvo Penta engines. The best way to confirm is by cross-referencing your engine's model number with the compatibility table above or checking if your existing part number matches 416033, 418361, 1317466, or Sierra 18-2933-9.
What are the signs of a failing thermostat sealing ring?
Common signs include visible coolant leaks around the thermostat housing, engine overheating due to coolant loss, or a low coolant warning light. You may also notice dried coolant residue (typically green or pink) near the thermostat area.
How often should this sealing ring be replaced?
It's good practice to replace the sealing ring whenever you replace the thermostat or service the cooling system. There is no fixed interval, but it should be inspected for signs of hardening, cracking, or degradation during routine maintenance.
Is this a direct replacement for Volvo Penta part 416033?
Yes, this is a direct aftermarket replacement for Volvo Penta part number 416033 and its successors, 418361 and 1317466. It is designed to meet or exceed OEM specifications for fit and function.
What is the difference between an OEM and an aftermarket part?
This listing is an aftermarket replacement (not OEM). It's built to OEM-level specifications with comparable materials and manufactured in an ISO 9002 certified facility. Every batch is inspected to ensure quality and consistency.
How fast do you ship and what are the costs?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free on most orders. Expedited shipping options, if available for your location, will appear at checkout.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal use. If you encounter any issues, please contact our support team with your order details. Returns are accepted within our standard window for unused items in their original condition. See our policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against 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, typically arriving in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or quality control.
Payment & Security
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