{"product_id":"volvo-83","title":"Volvo Penta Coolant Pump O-Ring 20502536","description":"\u003ch2\u003eVolvo Penta Coolant Pump O-Ring — Part No. 20502536\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 20502536\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Volvo Penta (Genuine OEM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Coolant Pump \/ Water Pump Sealing O-Ring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAssembly Location:\u003c\/strong\u003e Water Pump and Thermostat Housing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity per Assembly:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem:\u003c\/strong\u003e Engine Cooling — coolant pump sealing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat This Part Does\u003c\/h2\u003e\n\u003cp\u003eThis genuine OEM O-ring seals the coolant pump where it mounts to the water pump and thermostat housing on compatible Volvo Penta diesel engines. A failed or damaged O-ring at this location allows coolant to leak externally around the pump mounting area. It is also included in overhaul and cooling-system gasket sets for supported engine families.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Volvo Penta uses several different O-rings in the same water-pump and thermostat-housing assembly — including 21527767, 20459953, and other seals. Always match by part number from the diagram for your specific engine serial, rather than by appearance or size alone.\u003c\/p\u003e\n\n\u003ch2\u003eCompatible Applications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eVolvo Penta TD420VE\u003c\/li\u003e\n\u003cli\u003eVolvo Penta TAD420VE\u003c\/li\u003e\n\u003cli\u003eVolvo Penta TAD520GE \/ TAD520VE\u003c\/li\u003e\n\u003cli\u003eVolvo Penta TAD530GE \/ TAD531GE \/ TAD532GE\u003c\/li\u003e\n\u003cli\u003eVolvo Penta TAD620VE\u003c\/li\u003e\n\u003cli\u003eVolvo Penta TAD650VE \/ TAD660VE\u003c\/li\u003e\n\u003cli\u003eVolvo Penta TAD720 series\u003c\/li\u003e\n\u003cli\u003eVolvo Penta TAD730 series\u003c\/li\u003e\n\u003cli\u003eVolvo Penta TAD750VE \/ TAD760VE\u003c\/li\u003e\n\u003cli\u003eSelected Volvo Penta D5A \/ D7A \/ D7C engine families\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eConfirm against your engine serial number and the current Volvo Penta parts diagram before ordering — cooling-system component fitment can vary between closely related engine versions.\u003c\/p\u003e\n\n\u003ch2\u003eSerial Number \u0026amp; Fitment Notice\u003c\/h2\u003e\n\u003cp\u003eMultiple O-rings are used within the same thermostat housing and water pump assembly. Matching part number 20502536 to the specific position in the diagram for your engine serial is the most reliable approach. Do not substitute based on appearance or size.\u003c\/p\u003e\n\n\u003ch2\u003eWhen to Replace\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCoolant leakage visible around the pump mounting area\u003c\/li\u003e\n\u003cli\u003eCoolant pump removed for inspection, service, or replacement\u003c\/li\u003e\n\u003cli\u003eWater-pump housing disassembled for any cooling-system repair\u003c\/li\u003e\n\u003cli\u003eExisting O-ring found flattened, hardened, cut, or damaged on inspection\u003c\/li\u003e\n\u003cli\u003eEngine overhaul procedure calls for cooling-system seal renewal\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eClean the O-ring groove and all mating surfaces before fitting the new seal\u003c\/li\u003e\n\u003cli\u003eInspect the housing bore and pump mating surface for corrosion, pitting, or damage\u003c\/li\u003e\n\u003cli\u003eLubricate the new O-ring only as directed by the applicable Volvo Penta service procedure\u003c\/li\u003e\n\u003cli\u003eInstall the O-ring without twisting or pinching — seat it squarely in the groove\u003c\/li\u003e\n\u003cli\u003eRefill the cooling system with the correct Volvo Penta-approved coolant mixture after reassembly\u003c\/li\u003e\n\u003cli\u003eBleed air from the system and verify there is no leakage after a full warm-up cycle\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eRelated Products\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/volvo-penta-thermostat-20450736\"\u003eVolvo Penta Thermostat 82°C 20450736 | D5A D7A D7C TAD Series\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/volvo-penta-cooling-system-parts\"\u003eVolvo Penta Cooling System Parts\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/volvo-penta-gaskets-seals\"\u003eVolvo Penta Gaskets \u0026amp; Seals\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eParts Desk Insights\u003c\/h2\u003e\n\u003cp\u003eThis O-ring is the seal that keeps coolant inside the engine at the pump mounting joint — a small part with an outsized consequence if it fails. It’s best replaced any time the coolant pump is removed, since the cost of the seal is negligible compared to draining the system again later. The most common ordering error with cooling-system O-rings is selecting by visual size rather than part number — there are several O-rings in this housing cluster and they are not interchangeable. Pull the part number from the diagram for your specific engine serial to be certain.\u003c\/p\u003e","brand":"VOL","offers":[{"title":"Default Title","offer_id":43563977539620,"sku":"20502536","price":49.3,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/07b59f4e-7b7a-426d-816e-843aa96bb03f.png?v=1788734258","url":"https:\/\/marisolmarine.com\/products\/volvo-83","provider":"Marisol Marine Company","version":"1.0","type":"link"}