Exhaust Elbow Gasket – Fits Volvo Penta AQ165/AQ170 Series (Replaces 856042, 831330, 831480, 856045)
Exhaust Elbow Gasket – Fits Volvo Penta AQ165/AQ170 Series (Replaces 856042, 831330, 831480, 856045) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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Exhaust Elbow Gasket – Fits Volvo Penta AQ165/AQ170 Series (Replace...
Product Details
This Exhaust Elbow Gasket creates a secure seal between the exhaust elbow and manifold on Volvo Penta 6-cylinder gasoline engines, including the AQ165 and AQ170 series (165–170 HP) manufactured between 1968 and 1978. It is specifically designed for the B30 engine block used in these models.
It serves as a direct replacement for Volvo Penta part numbers 856042, 831330, 831480, and 856045, as well as aftermarket equivalents like GLM 35040.
- Installs directly between the exhaust elbow and manifold.
- Engineered as a bolt-on, flat gasket for marine exhaust systems.
- Package includes one gasket for a complete replacement.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Superseded By | Notes |
|---|---|---|---|
| Volvo Penta | 831330 | 856042 | |
| Volvo Penta | 831480 | 856042 | |
| Volvo Penta | 856045 | 856042 | |
| Volvo Penta | 856042 | — | Current OEM Number |
| GLM | 35040 | — | Aftermarket Interchange |
| AM | 856042 | — | Aftermarket Interchange |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This gasket is designed for specific Volvo Penta 6-cylinder gasoline models based on the B30 engine.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Volvo Penta | AQ165A | 165 | 4-Stroke | 1968–1969 | 856042 | Supersedes 831330, 831480, 856045 |
| Volvo Penta | AQ170A | 170 | 4-Stroke | 1969–1972 | 856042 | Supersedes 831330, 831480, 856045 |
| Volvo Penta | AQ170B | 170 | 4-Stroke | 1972–1973 | 856042 | Supersedes 831330, 831480, 856045 |
| Volvo Penta | AQ170C | 170 | 4-Stroke | 1973–1978 | 856042 | Supersedes 831330, 831480, 856045 |
| Volvo Penta | BB170A | 170 | 4-Stroke | 1969–1972 | 856042 | Supersedes 831330, 831480, 856045 |
| Volvo Penta | BB170B | 170 | 4-Stroke | 1972–1973 | 856042 | Supersedes 831330, 831480, 856045 |
| Volvo Penta | BB170C | 170 | 4-Stroke | 1973–1978 | 856042 | Supersedes 831330, 831480, 856045 |
| Volvo Penta | B30 | N/A | 4-Stroke | 856042 | Engine type used in AQ165/AQ170 series |
Technical Specs
- Product Type
- Exhaust Elbow Gasket
- Installation
- Between exhaust elbow and manifold
- Connection
- Bolt-on
- Dimensions
- 14.0" (L) x 14.0" (W) x 0.3" (H)
- Fitting Type
- Flat gasket
- Warranty
- 12 months standard; 24 months when installed by authorized dealer
- Other Technical Attributes
- Designed for marine exhaust systems
What’s in the Box
- 1 x Exhaust Elbow Gasket (Replaces 856042, 831330, 831480, 856045)
Installation Notes
- Ensure the engine is completely cool and disconnect the battery for safety.
- Gain access to the connection between the exhaust manifold and the exhaust elbow (riser).
- Carefully unbolt and remove the exhaust elbow. You may need to gently pry it loose.
- Remove the old gasket. Thoroughly clean both mating surfaces on the manifold and elbow, removing all old gasket material and corrosion.
- Position the new gasket correctly, ensuring any alignment holes match up.
- Reinstall the exhaust elbow and tighten the bolts in a crossing pattern to the manufacturer's recommended torque specification to ensure an even seal.
- Reconnect the battery, start the engine, and carefully check for any exhaust leaks around the new gasket.
Troubleshooting & FAQ
How can I confirm this gasket fits my engine?
This gasket is specifically for Volvo Penta 6-cylinder models AQ165A, AQ170A/B/C, and BB170A/B/C, which use the B30 engine. Please verify your exact model and year against the "Engine & Model Compatibility" table. If your model is not listed, this part may not fit.
What are the signs of a failing exhaust elbow gasket?
Common symptoms include a noticeable exhaust leak (hissing or popping sound from the engine bay), soot or carbon tracks around the elbow/manifold connection, elevated carbon monoxide levels in the boat, and potential loss of engine performance.
Why does this part replace so many different OEM numbers?
Over the years, manufacturers often update part numbers. This gasket replaces the entire supersession chain for the original parts (831330, 831480, 856045), all of which have been superseded by the current part number, 856042. Our gasket is designed to fit all applications that call for any of these numbers.
Do I need to use gasket sealant with this part?
This type of flat gasket is typically designed to be installed dry. However, always consult your engine's official service manual for the most accurate procedure. Some mechanics may apply a very thin coat of a marine-grade sealant, but it is not always required.
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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