Decarbonizing Gasket Kit – Fits Volvo Penta MD5A MD5B MD5C Diesel (Replaces 876341, 875561)

Product Details

This Decarbonizing Gasket Kit is designed for Volvo Penta MD5A, MD5B, and MD5C diesel marine engines. Engineered to restore proper sealing during decarbonization service, this kit ensures reliable performance and prevents exhaust leaks in these proven marine diesel models.

This aftermarket kit directly replaces Volvo Penta part numbers 876341 and 875561, as well as Crom Marine 121050 and Orbitrade ORB21561.

• Complete decarbonizing gasket set for one-step maintenance
• Designed for diesel marine applications
• Drop-in replacement for OEM equivalents

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

Application

Decarbonizing service

Engine Type

Diesel marine

OEM Reference

876341

What's in the Box

• 1 × Decarbonizing Gasket Kit

Installation Notes

1. Disconnect battery and allow engine to cool completely before beginning work.
2. Remove exhaust components to access cylinder head decarbonizing surfaces.
3. Carefully scrape away all old gasket material and carbon buildup from mating surfaces using a non-abrasive scraper.
4. Clean surfaces thoroughly with solvent and allow to dry completely.
5. Position new gaskets from kit onto clean, dry surfaces—do not reuse old gaskets.
6. Reinstall exhaust components and torque fasteners to manufacturer's specifications in the correct sequence.
7. Reconnect battery and run engine, checking for exhaust leaks around all gasket interfaces.

Troubleshooting & FAQ

How do I know if my engine needs a decarbonizing gasket kit?

Signs include exhaust smoke, visible leaks around the manifold or exhaust elbow, loss of power, or during routine decarbonization maintenance intervals specified by Volvo Penta.

Can I reuse the old gaskets if they look intact?

No. Gaskets compress and conform during initial installation. Reusing them may result in exhaust leaks, loss of compression, or premature failure. Always install new gaskets during reassembly.

What's the difference between MD5A, MD5B, and MD5C?

These are incremental model updates within the MD5 series. This decarbonizing gasket kit is compatible with all three variants as they share the same exhaust and cylinder head gasket geometry.

Do I need sealant with these gaskets?

Generally, decarbonizing gaskets are used dry unless the manufacturer specifies otherwise. Check your Volvo Penta service manual for model-specific torque and sealant requirements.

How often should decarbonizing be performed?

Volvo Penta typically recommends decarbonizing every 1,000–2,000 operating hours or as needed based on engine performance and exhaust condition. Consult your engine manual for exact intervals.

Will this kit fit later Volvo Penta MD models?

This kit is engineered specifically for MD5A, MD5B, and MD5C. Later MD models may use different gasket designs. Always verify part number cross-references before ordering.

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.