Volvo Penta Thermostat O-Ring 3586514 | D1 D2 D8 D9 D11 Diesel Cooling
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Part Details
- Part Number: 3586514
- Brand: Volvo Penta
- Type: O-ring — thermostat / heat-exchanger cooling-system seal
- System: Cooling — thermostat housing, heat-exchanger assembly, and oil-cooler thermostat area
- Diagram Position: Item 13 in the Volvo Penta heat-exchanger components assembly (D1/D2 applications); thermostat O-ring position in D11 oil-cooler / cooling-system assembly
- Qty Per Assembly: 1 per applicable thermostat assembly
- Weight: Approx. 0.01 kg
- Important: Distinct from nearby O-ring 3583830, which is a separate seal in the same D2 heat-exchanger assembly. Do not select by visual size alone — confirm by engine model, serial number, and diagram position.
About This Part
Genuine Volvo Penta 3586514 is an OEM O-ring used at the thermostat and heat-exchanger area of selected Volvo Penta diesel engines. Volvo Penta’s parts catalog places 3586514 directly within the heat-exchanger components assembly, adjacent to the thermostat and cover, where it provides the primary seal at the thermostat housing joint. On D2-series engines it is installed alongside thermostat 888624, cover 888622, and a separate O-ring 3583830 — these are different components and should be ordered individually if a complete thermostat housing service is planned. On D11 applications it also appears as the thermostat O-ring in the oil-cooler and cooling-system assembly, beside thermostat 21244994. Confirm fitment by the engine-specific cooling-system diagram and serial number, as the thermostat housing arrangement varies by engine generation.
Compatible Applications
- Volvo Penta D1-13 / D1-13B / D1-13F
- Volvo Penta D1-20 / D1-20B / D1-20F
- Volvo Penta D1-30 / D1-30B / D1-30F
- Volvo Penta D2-40 / D2-40B / D2-40F
- Volvo Penta D2-50F
- Volvo Penta D2-55 / D2-55B / D2-55C / D2-55D / D2-55E / D2-55F
- Volvo Penta D2-60F
- Volvo Penta D2-75 / D2-75B / D2-75C / D2-75F
- Selected Volvo Penta D8 applications
- Selected Volvo Penta D9 applications
- Selected Volvo Penta D11 applications — oil-cooler / thermostat position
Confirm by exact engine model, serial number, and the applicable heat-exchanger or oil-cooler cooling-system diagram. Do not apply broadly to D4 or D6 engines — current evidence does not confirm 3586514 for those families.
When to Replace
Replace this O-ring whenever the thermostat housing or cooling-system cover is opened, or when inspection reveals any of the following:
- Flattening or permanent compression set
- Cracking or hardening
- Cuts or pinching from previous installation
- Coolant seepage at the thermostat housing joint
- Swelling or distortion
- Loss of elasticity
A low-cost seal replacement during thermostat service is always the safer choice over reusing an aged O-ring that may fail shortly after reassembly.
Installation Notes
Clean the O-ring groove and all mating surfaces thoroughly before installation. Lightly lubricate the O-ring with the appropriate engine-safe coolant or assembly lubricant specified for the cooling system, and seat it evenly without twisting or stretching. On D2 heat-exchanger assemblies, 3586514 is installed alongside the following components — inspect and replace as needed while the assembly is apart:
- 888622 — thermostat cover
- 888624 — thermostat
- 3583830 — separate O-ring in the same assembly (distinct from 3586514)
- 3581070 — heat-exchanger O-rings
Manufacturer Parts Diagram
View Volvo Penta Heat Exchanger Components Diagram — 3586514 is identified as item 13 in the heat-exchanger components assembly on applicable D1/D2 engines.
Related Cooling System Parts
- Volvo Penta O-Ring 3583831 — Heat Exchanger / Oil Cooler Seal | D4 D6
- Volvo Penta O-Ring 3583832 — D4 / D6 Cooling System Seal
Cross-Reference Part Numbers
- Current OEM: 3586514
- Related (not a direct replacement): 888623 — appears in older parts notes at the thermostat-cover position; treat as a historical reference only
- Co-located seals (same assembly, different parts): 3583830, 3581070
- Note: No confirmed newer Volvo Penta superseding number identified. 3586514 remains the active service number.
Parts Desk Insight
3586514 is a thermostat-area cooling-system O-ring, not a generic Volvo Penta seal, and the most common mistake is selecting by size or ordering a single O-ring when the full thermostat housing service calls for multiple seals. On D2 heat-exchanger assemblies, 3586514 and 3583830 are two different O-rings in the same assembly — if the housing is apart for thermostat replacement, replacing both seals along with the thermostat and cover at the same time avoids a repeat service. Confirm the complete parts list from the heat-exchanger diagram for the specific engine serial number before ordering.
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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If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
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Important:
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