Exhaust Elbow Cap Gasket – Fits Volvo Penta AQ165/AQ170 (Replaces 856036, 831073)

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Exhaust Elbow Cap Gasket – Fits Volvo Penta AQ165/AQ170 (Replaces 856036, 831073) is backordered and will ship as soon as it is back in stock.

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Product Details

This is a direct replacement Exhaust Elbow Cap Gasket designed for Volvo Penta 6-cylinder B30 engines, specifically models AQ165 and AQ170 manufactured between 1969 and 1972. It ensures a proper seal between the exhaust elbow and the end cap, preventing exhaust leaks.

It serves as a direct interchange for Volvo Penta part numbers 856036 and 831073.

Installs as a direct replacement for the original gasket.
Seals the connection between the exhaust elbow and end cap.
Engineered from durable materials to withstand the marine environment.

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Brand	Part Number
Volvo Penta	856036
Volvo Penta	831073

Engine & Model Compatibility

Confirm your engine model/year in the table below.

For Volvo Penta owners, please verify your B30 engine model (AQ165 or AQ170) and production year fall within the specified range.

Brand	Model	Rated HP	Stroke	Years	OEM Part No.	Notes
Volvo Penta	AQ165A	165	4-Stroke	1969–1972	856036/831073	B30 engine
Volvo Penta	AQ170A	170	4-Stroke	1969–1972	856036/831073	B30 engine
Volvo Penta	6L AQ165	165	4-Stroke		856036	B30 engine
Volvo Penta	6L AQ170	170	4-Stroke		856036	B30 engine

Technical Specs

Product Type: Exhaust Elbow Cap Gasket
Installation: Direct replacement for original gasket
Connection: Between exhaust elbow and end cap
Housing Material: Gasket material (likely composite or metal)
Dimensions: 0.1" H x 10.0" W x 15.0" L
Fitting Type: Flat gasket
Other Technical Attributes: Used to seal exhaust system components

What’s in the Box

1 x Exhaust Elbow Cap Gasket (856036/831073)

Installation Notes

Disconnect the vessel's battery and ensure the engine is completely cool.
If required by your engine configuration, drain the coolant to a level below the exhaust manifold.
Carefully unbolt and remove the exhaust elbow's end cap.
Remove the old gasket and thoroughly clean both mating surfaces. Ensure they are free of old gasket material, rust, or debris.
Position the new gasket correctly on the elbow.
Re-install the end cap and tighten the bolts to the manufacturer's recommended torque specifications in a star or crisscross pattern.
Reconnect the battery, refill coolant if drained, and start the engine.
Check for any exhaust or water leaks around the sealed area.

Troubleshooting & FAQ

How can I confirm this gasket fits my specific engine?

This gasket is for Volvo Penta 6-cylinder B30 engines, including models AQ165A, AQ170A, 6L AQ165, and 6L AQ170. The surest way to confirm fitment is to match your existing part's number to the replacements listed: 856036 or 831073. Always verify your engine model and year against the compatibility table.

What are common signs that my exhaust elbow cap gasket is failing?

Signs of a faulty gasket include visible exhaust fumes or water leaking from the joint between the exhaust elbow and its end cap. You might also notice a decrease in engine performance or unusual exhaust sounds. Carbon soot or water stains around the connection point are clear indicators.

Do I need to use sealant or gasket adhesive with this part?

This gasket is designed to be installed dry. The use of additional sealants is generally not recommended unless specified by your engine's service manual. Always ensure mating surfaces are perfectly clean and flat before installation for a proper seal.

How often should this gasket be replaced?

Replacement interval depends on usage and environmental factors (freshwater vs. saltwater). It is good practice to inspect exhaust components annually and replace gaskets whenever the components are disassembled or if signs of a leak appear.

Is this a genuine OEM part?

This listing is for an aftermarket replacement component, not a genuine OEM part. It has been engineered to meet or exceed original equipment manufacturer (OEM) specifications for fit, form, and function, and is produced in an ISO 9002 certified facility to ensure quality.

What are the shipping options and costs?

We ship worldwide, with most orders arriving within 5–15 days. Standard shipping is free. If available for your location, expedited shipping options and their costs will be displayed 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 an issue, please contact our support team with your order number. We accept returns for unused items in their original packaging within our standard return period. For full details, please see our policy page.

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

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