Volvo Penta Sealing Ring 864723 | Early Type | Inlet & Exhaust Pipe Connection | AD31 AD41 TAMD KAD

Volvo Penta OEM Sealing Ring — Part 864723 (Early Type)

• Part Number: 864723
• Brand: Volvo Penta (Genuine OEM)
• Official Product Type: Seals & Gaskets — Inlet / Exhaust Pipe Connection
• Type Designation: Early Type
• Supersedes: 471449 (earlier Volvo Penta sealing ring, replaced by 864723)
• System: Inlet and Exhaust System — pipe connection sealing
• Diagram Position: Item 9 in the D41D Inlet and Exhaust System schematic — seals the connection between pipe connection 838857 and connecting pipe 838867
• Sold: Individually
• Weight: approx. 0.05 kg

What It Does

This is the genuine OEM sealing ring used at the inlet and exhaust pipe connection on a broad range of Volvo Penta marine diesel engines. It seals the joint between the pipe connection and connecting pipe in the inlet/exhaust assembly. Because this ring is identified as early type, it is specific to engines produced within certain serial ranges — engine model alone is not sufficient for fitment confirmation. Always verify by serial number and the applicable Volvo Penta parts schematic.

Compatible Applications

Confirm fitment by engine model, serial number, and parts schematic before ordering. This is an early-type sealing ring — later production engines may use a different seal arrangement.

AD Series

• AD31B, AD31D-A, AD31L-A, AD31P-A, AD31XD
• AD41B, AD41BJ, AD41D, AD41L-A, AD41P-A

D Series

• D41B, D41D, D41L-A

KAD Series

• KAD32P, KAD42A, KAD42B, KAD42P-A, KAD43P-A, KAD43P-B
• KAD44P, KAD44P-B, KAD44P-C, KAD300-A

KAMD Series

• KAMD42A, KAMD42B, KAMD42P-A, KAMD43P, KAMD43P-A, KAMD43P-B
• KAMD44P-A, KAMD44P-B, KAMD44P-C, KAMD300-A

TAMD Series

• TAMD31B, TAMD31D, TAMD31L-A, TAMD31M-A, TAMD31P-A, TAMD31S
• TAMD41B, TAMD41D, TAMD41H-A, TAMD41H-B, TAMD41P, TAMD41P-A
• TAMD42B, TAMD42WJ-A
• TAMD61A, TAMD62A
• TAMD63L-A, TAMD63P-A
• TAMD71A, TAMD71B, TAMD72A, TAMD72P-A, TAMD72WJ-A
• TAMD73P-A, TAMD73WJ-A
• TAMD74A, TAMD74C-A, TAMD74C-B, TAMD74L-A, TAMD74L-B, TAMD74P-A, TAMD74P-B
• TAMD75P-A

TMD / TWD Series

• TMD31B, TMD31D, TMD31L-A
• TMD41B, TMD41D, TMD41L-A
• TWD630ME

Not sure it fits? Send us your Volvo Penta engine model and serial number before ordering.

Part Numbers & Supersession

• 864723 — Current Volvo Penta OEM reference
• 471449 — Earlier Volvo Penta sealing ring; superseded by 864723

Assembly Context (D41D Inlet & Exhaust System — Schematic Reference)

In the D41D inlet and exhaust system diagram:

• Item 9 — 864723 Sealing Ring (this part)
• Item 6 — 838857 Pipe Connection
• Item 10 — 838867 Connecting Pipe

Nearby components in the same assembly include clamp 32447, V-clamp 838864, and O-ring 967944. While the assembly is apart, inspect the complete pipe connection and replace any worn or damaged components.

When to Replace

Replace the sealing ring when:

• The inlet or exhaust pipe connection is disassembled for any reason
• The ring is flattened, hardened, or cracked
• Leakage or staining is visible around the pipe connection joint
• The sealing surface shows evidence of blow-by or loss of sealing integrity
• The ring has been disturbed during manifold or connecting-pipe service

A previously compressed sealing ring may not reseal correctly once the joint has been separated — replacement at reassembly is the recommended practice.

Service Interval

There is no fixed replacement interval — replace on condition or whenever the joint is disturbed. Inspect during any inlet/exhaust or manifold service and replace if the ring shows any sign of compression set, hardening, cracking, or surface damage.

Installation Notes

• Confirm this is the early-type sealing ring required for the engine serial range being serviced
• Clean all mating surfaces before reassembly
• Inspect clamp 32447 and V-clamp 838864 for wear or damage while the assembly is apart
• Inspect O-ring 967944 in the same area
• Follow the applicable Volvo Penta workshop procedure for pipe alignment, clamp installation, and tightening sequence

Technical FAQ

Q: What does “early type” mean for 864723?
Volvo Penta used different sealing arrangements across production runs of the same engine families. “Early type” means this ring applies to engines produced within specific earlier serial ranges. Later serial numbers may use a different seal. Confirm by serial number and the correct parts diagram for your engine.

Q: Does 864723 replace 471449?
Yes. 864723 is the current Volvo Penta OEM reference that supersedes the earlier 471449. If your diagram shows 471449, 864723 is the correct current part to order.

Q: Can I reuse the sealing ring after removing the pipe connection?
Volvo Penta workshop practice is to replace the sealing ring whenever the joint is disassembled. A compressed ring that has been in service may not reseal correctly after removal.

Q: Is this the same ring used on all engines in the compatibility list?
The part number is the same across all listed applications, but the early-type designation means it is specific to certain serial ranges. Always cross-reference your engine serial number against the applicable parts diagram.

Parts Desk Insights

The detail that matters most with 864723 is the early-type designation. This sealing ring covers a very wide range of Volvo Penta diesel families — from the 31 and 41 series through the large TAMD 61–75 engines — but that broad coverage only applies to engines within the earlier production serial ranges. The most common issue we see is customers ordering by engine model without confirming the serial break. If your engine is at the upper end of any of the listed production ranges, confirm the serial number against the Volvo Penta diagram before ordering. While you have the pipe connection apart, it is also worth inspecting the adjacent clamp and O-ring at the same time — the labour to come back and fix a leaking clamp or failed O-ring after reassembly is not worth the cost of skipping those components during service.