Decarb Head Gasket Kit – Fits Volvo Penta AD31 AQAD31 KAD32 TMD31 (Replaces 3582435, 876103, 3582432)

Product Details

This Decarb Head Gasket Kit – Fits Volvo Penta AD31 AQAD31 KAD32 TMD31 is engineered for decarbonizing service on Volvo Penta 31 and 32 series marine diesel engines. Compatible with models including AD31, AQAD31, KAD32, and TMD31 across multiple suffix variants, this kit delivers the sealing components required for top-end maintenance and overhaul work.

This kit directly replaces Volvo Penta OEM numbers 3582435, 876103, 876121, 3582432, and 358121, as well as aftermarket equivalents from Crom Marine (121025), Orbitrade (ORB21103), and SLP (HS-435).

• Complete decarbonizing head gasket set for cylinder head service
• Suitable for marine diesel applications in commercial and recreational vessels
• Includes all essential gaskets for a proper seal during reassembly

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 / cylinder head service

Engine Series

Volvo Penta 31, 32 series marine diesel

Fuel Type

Diesel

Primary OEM Number

3582435

What's in the Box

• 1 × Decarbonizing Head Gasket Kit

Installation Notes

1. Disconnect battery and allow engine to cool completely before beginning service.
2. Remove cylinder head following manufacturer torque sequence in reverse.
3. Inspect mating surfaces for warping, pitting, or carbon buildup and resurface or clean as needed.
4. Lay out all gasket components from the kit and verify each piece matches your engine layout.
5. Install new gaskets dry or with specified sealant per Volvo Penta service manual.
6. Reinstall cylinder head, torquing fasteners in the correct sequence and increments.
7. Allow sealant to cure if used, then refill coolant and check for leaks before starting.
8. Run engine at idle and inspect all sealed joints; retorque head bolts after initial heat cycle if specified.

Troubleshooting & FAQ

Which Volvo Penta engines does this kit fit?

This decarbonizing head gasket kit is designed for Volvo Penta AD31, AQAD31, KAD32, MD31, TAMD31, TD31ACE, and TMD31 series engines, including suffix variants A, B, D, L-A, M-A, P-A, and XD. Always verify your engine model against the compatibility table before purchase.

What does "decarbonizing" gasket kit mean?

A decarbonizing kit includes gaskets needed when removing the cylinder head to clean carbon deposits from combustion chambers, valves, and piston tops. It ensures a proper seal during reassembly after top-end maintenance or overhaul work.

Can I reuse the old head gasket?

No. Head gaskets are crush-type seals designed for one-time use. Reusing a gasket can result in coolant leaks, compression loss, or catastrophic head failure. Always install a new gasket set when the cylinder head is removed.

Do I need sealant with these gaskets?

Consult your Volvo Penta service manual. Some gaskets in this kit are installed dry, while others may require a thin coat of specified sealant. Using the wrong product can cause leaks or gasket failure.

How often should I decarbonize my Volvo Penta diesel?

Decarbonizing intervals depend on operating hours, fuel quality, and duty cycle. Typical recommendations range from 1,000 to 2,500 hours, or when symptoms like rough idle, loss of power, or increased exhaust smoke appear. Refer to your engine's maintenance schedule.

What torque sequence should I use for the cylinder head?

Torque sequences and values vary by engine model and bolt type. Always follow the procedure outlined in the official Volvo Penta workshop manual for your specific engine. Incorrect torque or sequence can warp the head or cause 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.