Volvo Penta Crankcase Ventilation Filter O-Ring 3584461 | D4 D6 D9 Diesel OEM

Volvo Penta 3584461 – Crankcase Ventilation Filter O-Ring

Part Number: 3584461
Brand: Volvo Penta
Official Product Type: Crankcase Ventilation Filter O-Ring (OEM)
Supersedes: No prior part number on record
Replaced By: No current supersession — 3584461 is the active OEM number
Engine Family: Volvo Penta D4, D6, and D9 Marine Diesel
System: Crankcase Ventilation — Filter and Insert Assembly
Diagram Position: Item 5 on D4/D6 crankcase ventilation assemblies; Item 9 on the D9A2A arrangement
Quantity Per Assembly: 1 O-ring per assembly
Weight: 0.01 kg (0.02 lb)

The Volvo Penta 3584461 is a genuine OEM O-ring that seals the crankcase ventilation filter assembly on Volvo Penta D4, D6, and D9 marine diesel engines. It sits directly between the filter housing and insert 3584145, sealing against crankcase oil mist and vapour leakage. Replace this O-ring any time the crankcase ventilation filter assembly is disassembled for service.

Compatible Applications

Verify your engine model and serial number before ordering.

• Volvo Penta D4-180I-B / C / D / F
• Volvo Penta D4-210A-B
• Volvo Penta D4-225A-F / D4-225I-F
• Volvo Penta D4-260A-F / D4-260D-F / D4-260I-F
• Volvo Penta D4-300A-F / D4-300D-F / D4-300I-F
• Volvo Penta D6-280A / D6-280I
• Volvo Penta D6-300A-F / D6-300D-F / D6-300I-F
• Volvo Penta D6-310A
• Volvo Penta D6-330A-F / D6-330D-F / D6-330I-F
• Volvo Penta D6-370A-F / D6-370D-F / D6-370I-F
• Volvo Penta D6-400A-E / F
• Volvo Penta D6-435D-F / D6-435I-F
• Volvo Penta D9-425 / D9-500 / D9-575 (D9A2A — confirm serial number)

The D4, D6, and D9 families use different crankcase ventilation housings and surrounding components even though 3584461 is shared across many installations. Always confirm against the crankcase ventilation diagram for your exact engine model and serial number before ordering.

Serial Number Fitment Notice

Fitment must be confirmed by the exact engine model, serial number, and crankcase ventilation parts diagram. Multiple ventilation system configurations exist across D4, D6, and D9 production ranges — serial-number breaks can affect which O-ring is required. Locate the engine identification plate and verify your model and serial number before ordering.

Specifications

• Type: Crankcase ventilation filter housing seal
• System: Crankcase ventilation — filter and insert assembly
• Assembly position: Item 5 (D4/D6) · Item 9 (D9A2A)
• Used with: Filter insert 3584145
• Quantity per assembly: 1
• Weight: 0.01 kg (0.02 lb)
• Material: Oil-resistant elastomer (OEM spec)

When to Replace

• Whenever the crankcase ventilation filter or insert is removed for service
• O-ring is flattened, hardened, cracked, or swollen
• Evidence of oil mist or crankcase vapour seepage around the filter housing
• At every scheduled crankcase ventilation filter service interval
• During any adjacent ventilation system service where the housing is opened

Service Interval

Replace this O-ring every time the crankcase ventilation filter assembly is disassembled. A disturbed O-ring should never be reused — even a seal that appears undamaged can lose its ability to compress and seal correctly after removal. Inspect filter insert 3584145 at the same time.

Installation Notes

Clean the O-ring groove and both mating surfaces thoroughly before installing the new O-ring. Install the O-ring without twisting or pinching — a twisted O-ring will not seal correctly and is a common cause of post-service seepage. Reassemble according to the applicable Volvo Penta service procedure for your engine.

Related Parts

• Volvo Penta Crankcase Ventilation Filter Insert 3584145 — Replace together with this O-ring at every filter service
• Crankcase ventilation filter 3584144 — Replace at filter service interval
• Hose assembly 3849236 (D4/D6) — Inspect while ventilation system is open
• Non-return valve 3887102 — Inspect at crankcase ventilation service

Technical FAQ

Q: Why is this O-ring specifically for the crankcase ventilation filter, not a general engine O-ring?
A: Volvo Penta's parts catalog places 3584461 directly in the crankcase ventilation filter assembly alongside insert 3584145 across D4, D6, and D9 engines. It is sized and rated specifically for this housing and is not interchangeable with other engine O-rings. Always confirm against your engine's parts diagram.

Q: Can I reuse this O-ring after opening the filter housing?
A: No. Once removed from its groove, an O-ring should always be replaced. A disturbed O-ring can fail to seal correctly even if it appears undamaged, leading to oil mist seepage from the crankcase ventilation system.

Q: Can I use a generic O-ring instead of the OEM part?
A: A generic O-ring may appear similar but can have the wrong cross-section dimension or insufficient oil and heat resistance for this application. The OEM part ensures the correct fit and material spec for the crankcase ventilation environment.

Q: Should I replace the filter insert at the same time?
A: Yes, if it has reached its service interval or shows contamination or wear. Replacing the O-ring and insert 3584145 together avoids reopening the assembly shortly after.

Parts Desk Insights

This O-ring is the part most commonly missed when ordering the crankcase ventilation filter or insert for D4, D6, and D9 engines. It is inexpensive on its own, but skipping it means reopening the assembly — adding time and frustration to an otherwise straightforward service. Ordering it alongside filter insert 3584145 is the smarter move.

The most common post-service issue is oil mist seepage around the ventilation filter housing — usually caused by a twisted or reused O-ring. Installing the new seal flat and evenly, without twisting, is the most important step in a clean crankcase ventilation filter service on these engines.