Exhaust Manifold Gasket – Fits Volvo Penta AD40B/AQAD40A/TMD40A/B/C (Replaces 22121)
Exhaust Manifold Gasket – Fits Volvo Penta AD40B/AQAD40A/TMD40A/B/C (Replaces 22121) is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
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
Exhaust Manifold Gasket – Fits Volvo Penta AD40B/AQAD40A/TMD40A/B/C...
Product Details
This Exhaust Manifold Gasket is designed for Volvo Penta diesel engines, specifically for the AD40B, AQAD40A, TMD40A, TMD40B, and TMD40C models. It provides a reliable seal for the exhaust manifold connection, ensuring optimal engine performance.
It serves as a direct aftermarket replacement for Volvo Penta part number 22121 and Orbitrade ORB22121.
- Engineered for direct, hassle-free installation.
- Ensures a secure seal for the exhaust manifold connection.
- Designed specifically for use in diesel engine applications.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Volvo Penta | 22121 |
| Orbitrade | ORB22121 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This gasket is compatible with the following Volvo Penta diesel engine models.
| Brand | Model | Stroke | OEM Part No. |
|---|---|---|---|
| Volvo Penta | AD40B | 4-Stroke | 22121 |
| Volvo Penta | AQAD40A | 4-Stroke | 22121 |
| Volvo Penta | TMD40A | 4-Stroke | 22121 |
| Volvo Penta | TMD40B | 4-Stroke | 22121 |
| Volvo Penta | TMD40C | 4-Stroke | 22121 |
Technical Specs
- Product Type
- Exhaust Manifold Gasket
- Installation
- Direct replacement
- Fuel Type
- Diesel
- Other Technical Attributes
- Exhaust manifold connection
- Product Dimensions
- 11.0" L x 10.5" W x 1.0" H
What’s in the Box
- 1 x Exhaust Manifold Gasket (22121)
Installation Notes
- Ensure the engine is cool and disconnect the battery before starting.
- Drain engine coolant to a level below the exhaust manifold.
- Carefully remove the old manifold, disconnecting any sensors or hoses attached.
- Thoroughly clean the mating surfaces of both the manifold and cylinder head, ensuring all old gasket material is removed.
- Position the new gasket. Do not use sealant unless explicitly required by your engine's service manual.
- Reinstall the exhaust manifold, tightening the bolts in the sequence and to the torque values specified by the manufacturer.
- Reconnect all components, refill the coolant, and reconnect the battery.
- Start the engine and carefully check for any exhaust or coolant leaks.
Troubleshooting & FAQ
How do I know if this gasket will fit my engine?
This gasket is specifically designed for Volvo Penta models AD40B, AQAD40A, TMD40A, TMD40B, and TMD40C. To ensure a correct fit, please cross-reference your engine model and original part number (22121) with our compatibility tables.
What are the signs of a failed exhaust manifold gasket?
Common symptoms of a bad gasket include unusually loud engine noises, a noticeable decrease in performance and power, the smell of exhaust fumes in the engine bay, and visible black soot or cracking around the manifold seals.
Do I need to use sealant with this gasket?
This gasket is designed to be installed dry. Using sealant is generally not recommended unless explicitly specified by your engine's service manual, as it can cause an improper seal or other complications.
How often should I replace the exhaust manifold gasket?
There is no fixed replacement schedule. The gasket should be replaced any time the manifold is removed for service or if any signs of failure (leaks, noise, etc.) are detected.
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
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
