Head Decarbonizing Gasket Set – Fits Volvo Penta MD1B MD2B MD3B AQD2B D1 D2 D3 (Replaces 876377)

Product Details

This Head Decarbonizing Gasket Set is designed for Volvo Penta MD1B, MD2B, MD3B, AQD2B, D1, D2, and D3 diesel engine models. The set provides critical sealing components required during cylinder head decarbonizing service, ensuring proper compression and preventing exhaust leaks across a range of Volvo Penta marine diesel applications.

This gasket set directly replaces Volvo Penta OEM part numbers 875500, 875502, 875504, 876374, 876375, and 876377.

• Drop-in replacement for multiple Volvo Penta diesel engine families
• Quantity requirements vary by model: MD1B requires 1 kit, AQD2B and MD2B require 2 kits, MD3B requires 3 kits
• Designed for head decarbonizing service and routine overhaul procedures

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

OEM Part Number

876377

Application

Head decarbonizing service

Engine Type

Diesel

Kit Configuration

1 Head Decarbonizing Gasket Set

What's in the Box

• 1 × Head Decarbonizing Gasket Set

Installation Notes

1. Verify the number of kits required for your specific engine model before starting work (MD1B=1, AQD2B/MD2B=2, MD3B=3).
2. Disconnect the battery and allow the engine to cool completely.
3. Remove valve cover, fuel lines, and any components obstructing access to the cylinder head.
4. Carefully remove the cylinder head bolts in the reverse of the tightening sequence.
5. Lift the cylinder head off the block and inspect mating surfaces for damage or warping.
6. Clean all carbon deposits from the cylinder head, valves, and piston crowns thoroughly.
7. Remove all old gasket material from the head and block surfaces using a scraper; avoid gouging metal.
8. Install new gaskets from this set in the correct orientation according to your engine's service manual.
9. Reinstall the cylinder head and torque bolts to specification in the correct sequence.
10. Reconnect all fuel lines, electrical connections, and auxiliary components.
11. Refill coolant and check all connections for leaks before starting the engine.
12. Run the engine at idle and inspect for proper operation, checking for exhaust or coolant leaks.

Troubleshooting & FAQ

How do I know how many kits I need?

The number of kits required depends on your engine model: MD1B requires 1 kit, AQD2B and MD2B each require 2 kits, and MD3B requires 3 kits. Always confirm your exact model before ordering.

Can I reuse the old gaskets during decarbonizing?

No, gaskets are single-use components. Reusing compressed or deformed gaskets will result in leaks, poor compression, and potential engine damage. Always install new gaskets when performing head service.

What is decarbonizing and when should I do it?

Decarbonizing is the process of removing carbon buildup from combustion chambers, valves, and piston crowns. It's typically performed every 500–1000 operating hours or when you notice rough running, loss of power, or excessive smoke.

Will this kit fit D1, D2, and D3 models?

Yes, this gasket set is compatible with Volvo Penta D1, D2, and D3 diesel engines. However, verify your specific engine configuration and serial number against Volvo service documentation to confirm fitment.

Do I need special tools to replace these gaskets?

You will need a torque wrench, socket set, gasket scraper, and a clean workspace. Refer to your engine's service manual for torque specifications and tightening sequences. Professional installation is recommended if you lack experience with engine work.

What are signs that I need to replace head gaskets?

Common symptoms include white smoke from the exhaust, coolant loss without visible leaks, overheating, rough idle, or oil contamination in the coolant. Perform a compression test if you suspect gasket failure.

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.