Exhaust Intake Manifold Gasket – Fits Volvo Penta AQ 120-151 (Replaces 1378879, 1266796, 463225)

Product Details

This Exhaust Intake Manifold Gasket is designed for Volvo Penta AQ series engines including models AQ 120B, AQ 125A, AQ 125B, AQ 131A, AQ 131B, AQ 131C, AQ 131D, AQ 140A, AQ 145A, AQ 145B, AQ 151A, AQ 151B, and AQ 151C. Engineered to seal the connection between the exhaust and intake manifold, this gasket ensures proper engine operation and prevents leaks.

This aftermarket gasket directly replaces Volvo Penta OEM part numbers 1378879, 1266796, and 463225.

• Direct bolt-on replacement for specified Volvo Penta models
• Ensures reliable sealing between manifold components
• Manufactured to OEM-equivalent dimensions and material specifications

Part Number Matrix

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

Engine & Model Compatibility

Confirm your engine model/year in the table below.

Technical Specs

Part Type

Exhaust Intake Manifold Gasket

Application

Volvo Penta AQ series marine engines

Replaces OEM

1378879, 1266796, 463225

Material

Composite gasket material designed for high-temperature sealing

Compatibility

Volvo Penta AQ 120–151 series inboard engines

What's in the Box

• 1 × Exhaust Intake Manifold Gasket

Installation Notes

1. Disconnect the battery and allow the engine to cool completely before beginning work.
2. Remove existing hardware securing the manifold and carefully separate the manifold from the engine block.
3. Thoroughly clean both mating surfaces, removing all remnants of the old gasket and any debris or corrosion.
4. Inspect surfaces for warping or damage; machine or replace components if necessary.
5. Position the new gasket on the mounting surface, ensuring all bolt holes align correctly.
6. Reinstall the manifold and hand-thread all fasteners to avoid cross-threading.
7. Torque bolts to manufacturer specifications in a cross-pattern sequence to ensure even pressure distribution.
8. Reconnect all hoses, electrical connections, and fuel lines as applicable.
9. Reconnect the battery, start the engine, and check for leaks at the gasket interface during initial warm-up.

Troubleshooting & FAQ

How do I know if my manifold gasket needs replacement?

Common signs include exhaust leaks at the manifold junction, visible cracks or burn-through on the gasket, coolant or oil weeping from the manifold area, rough idle, or loss of power. If you notice any of these symptoms, inspect and replace the gasket as needed.

Will this gasket fit my specific Volvo Penta engine?

This gasket fits Volvo Penta AQ 120B, 125A, 125B, 131A, 131B, 131C, 131D, 140A, 145A, 145B, 151A, 151B, and 151C models. Cross-reference your engine model and existing part number with the compatibility table above to confirm fitment.

Do I need to use sealant with this gasket?

Typically, manifold gaskets are installed dry without additional sealant. Always consult your engine service manual for specific instructions, as some applications may require a light coating of high-temperature sealant on certain surfaces.

What torque specifications should I use when installing?

Refer to your Volvo Penta service manual for the correct torque values and tightening sequence for your specific engine model. Proper torque and pattern are critical to prevent gasket failure and ensure a leak-free seal.

Can I reuse the old gasket if it looks intact?

No. Gaskets are designed for single use and compress to conform to surface irregularities during installation. Reusing a gasket can result in leaks and engine performance issues. Always install a new gasket when servicing the manifold.

How often should this gasket be replaced?

Replace the manifold gasket whenever the manifold is removed for service or repair, or when symptoms of gasket failure appear. There is no fixed service interval; replacement is condition-based.

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 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 in 5–15 days.
• Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.