Volvo Penta Cooling System Sealing Ring 430272 – AQ165 AQ170 BB165 BB170
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Volvo Penta Cooling System Sealing Ring 430272 – AQ165 / AQ170 / BB165 / BB170
| Part Number | 430272 |
| Brand | Volvo Penta |
| Official Part Type | Sealing Ring |
| Specification Reference | D42A / PP Spec. 16053 / 867638 |
| Diagram Position (AQ165A) | Item 9 — cooling-system assembly |
| System | Cooling system / induction manifold / aftercooler |
| Weight | 0.003 kg |
What This Part Is
Volvo Penta 430272 is a genuine OEM sealing ring used in cooling-system and induction-manifold assemblies on selected legacy Volvo Penta AQ and BB gasoline engines. On the AQ165A cooling-system diagram it appears at item 9, called out specifically for the D42A / PP Spec. 16053 / 867638 configuration. A separate Volvo Penta parts diagram also documents 430272 in the TAMD70B induction manifold and aftercooler assembly, confirming this sealing-ring specification was used across more than one legacy application.
Important: On the AQ165A cooling-system diagram, Volvo lists both 430272 (special specification) and 430018 (standard) at the same schematic position for different build specifications. These are not interchangeable. Do not substitute one for the other without confirming which specification applies to your engine.
Compatible Applications
- Volvo Penta AQ165A — cooling system (item 9, D42A / PP Spec. 16053 / 867638 configuration)
- Volvo Penta AQ170A / AQ170B / AQ170C — cooling system (confirm by serial)
- Volvo Penta BB165A — cooling system (confirm by serial)
- Volvo Penta BB170A / BB170B / BB170C — cooling system (confirm by serial)
- Volvo Penta TAMD70B — induction manifold and aftercooler assembly (confirm by serial)
Fitment Notice
On AQ165A cooling-system diagrams, Volvo Penta lists four related sealing rings at adjacent positions:
- 430018 — standard sealing ring at item 9 position
- 430272 — special-specification sealing ring at item 9 position (this part)
- 430172 — standard sealing ring at the adjacent position
- 430273 — special-specification sealing ring at the adjacent position
These are application variants, not supersessions. Do not treat nearby part numbers as interchangeable. Confirm which number applies to your exact engine build specification before ordering. Always verify against your engine serial number and the correct Volvo Penta parts diagram.
When to Replace
- Sealing ring is hardened, flattened, split, or damaged
- Coolant leakage is visible at the sealed joint
- Cooling or induction assembly is being disassembled for other service
- Ring has been disturbed and can no longer provide dependable sealing
- Applicable Volvo Penta service procedure specifies ring replacement
Installation Notes
- Confirm part number 430272 against your engine serial number and the Volvo Penta parts diagram for your specific engine before installation
- Clean the sealing groove and mating surfaces before fitting the new ring
- Compare the replacement ring against the removed ring to confirm size and profile match
- Install without twisting or pinching the ring
- Reassemble to Volvo Penta torque specifications
- Pressure-check the cooling system after reassembly
Service Interval
No fixed calendar interval. Replace whenever the cooling or induction assembly is disassembled and the ring shows compression set, hardening, or any damage. Proactive replacement is recommended any time this area is opened for other service — sealing rings are low-cost insurance against a repeat teardown.
Technical FAQ
Can I use 430018 instead of 430272?
No — not without confirming which specification applies to your engine. On the AQ165A cooling-system diagram, Volvo lists both numbers at the same schematic position for different build specifications (standard vs. special spec). They may not be dimensionally or functionally identical. Confirm which number is correct for your engine’s configuration before ordering.
Is 430272 still a current Volvo Penta part?
Yes. Current OEM dealer sources list 430272 as an active genuine part number with no confirmed supersession to a new number.
Does this ring fit TAMD70B engines?
A Volvo Penta parts diagram documents 430272 in the TAMD70B induction manifold and aftercooler assembly. Confirm against your TAMD70B engine serial number and the specific diagram position before ordering.
Why does it matter which sealing ring I use?
Sealing rings that look similar can have different dimensions, durometer (hardness), or material specifications for different groove and housing combinations. Using the wrong ring can result in coolant leakage or premature seal failure. For legacy engines like the AQ165 and AQ170 families, matching by exact part number from the schematic is the only reliable method.
Parts Desk Insights
The key point with 430272 is that it is a special-specification sealing ring — not a generic cooling seal. On the AQ165A diagram it shares a schematic position with the standard 430018 but is called out separately for a specific build configuration. The most common ordering mistake in this part family is assuming that nearby part numbers at the same schematic position are interchangeable. They are not. When a customer is sourcing sealing rings for an AQ165 or AQ170 cooling system rebuild, the right approach is to get the engine serial number, pull the correct diagram, and confirm each ring number position by position rather than ordering by appearance or proximity.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
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