{"product_id":"volvo-penta-o-ring-3583831","title":"Volvo Penta O-Ring 3583831 – Heat Exchanger \/ Oil Cooler Seal | D4 D6","description":"\u003ch2\u003eVolvo Penta O-Ring 3583831 – Heat Exchanger \/ Oil Cooler Seal\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e 3583831\u003cbr\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Volvo Penta (OEM)\u003cbr\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e O-Ring \/ Cooling System Seal\u003cbr\u003e\n\u003cstrong\u003eSystem:\u003c\/strong\u003e Cooling – Heat Exchanger \u0026amp; Oil Cooler Thermostat Assembly\u003cbr\u003e\n\u003cstrong\u003eSold:\u003c\/strong\u003e Individually\u003c\/p\u003e\n\n\u003cp\u003eThe Volvo Penta 3583831 is a genuine OEM O-ring that seals the heat exchanger and oil cooler thermostat assembly on D4 and D6 marine diesel engines. It sits within a three-seal cooling stack alongside \u003ca href=\"\/products\/volvo-penta-thermostat-cooling-o-ring-3583830\"\u003e3583830\u003c\/a\u003e and \u003ca href=\"\/products\/volvo-penta-cooling-system-o-ring-3583832\"\u003e3583832\u003c\/a\u003e, and is most often serviced whenever that assembly is opened for any reason.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVolvo Penta D4-180 through D4-300 (verify by engine serial number)\u003c\/li\u003e\n\u003cli\u003eVolvo Penta D6-280 through D6-480 (verify by engine serial number)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCooling-system layout, heat exchanger version, and oil cooler configuration vary across D4 and D6 production runs. Always confirm fitment using your engine serial number and the applicable Volvo Penta cooling-system parts diagram before ordering.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eSerial Number \u0026amp; Diagram Fitment Notice\u003c\/h3\u003e\n\u003cp\u003eSeveral O-rings in this cooling stack are similar in appearance but seal different positions (see diagram positions in the Volvo Penta D4\/D6 Cooling System schematic). Match part number 3583831 to its exact diagram position for your serial range — do not rely on visual size comparison alone.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eWhen to Replace\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAny time the heat exchanger, oil cooler thermostat housing, or adjacent cooling assembly is opened\u003c\/li\u003e\n\u003cli\u003eWhen the seal shows flattening, hardening, swelling, or signs of seepage\u003c\/li\u003e\n\u003cli\u003eDuring cooling-system service when the thermostat-area sealing group is already apart\u003c\/li\u003e\n\u003cli\u003eDo not reuse a previously compressed or heat-cycled O-ring — replace as a matter of course\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n\u003cp\u003eClean the sealing groove thoroughly before fitting the new O-ring. Install dry or with a light film of clean engine oil to ease seating — do not use petroleum-based grease. Confirm the diagram position of each seal before reassembly to avoid transposing adjacent O-rings.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eService Interval\u003c\/h3\u003e\n\u003cp\u003eReplace any time the heat exchanger or oil cooler thermostat housing is disassembled, or when seepage or seal degradation is found during a cooling-system inspection. At the cost of this seal, replacement on every opening is the right call.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eKit Contents\u003c\/h3\u003e\n\u003cp\u003e1 × O-Ring 3583831 (sold individually)\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eRelated Parts\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/volvo-penta-thermostat-cooling-o-ring-3583830\"\u003eVolvo Penta O-Ring 3583830\u003c\/a\u003e – adjacent seal in the same cooling stack (replace together)\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/volvo-penta-cooling-system-o-ring-3583832\"\u003eVolvo Penta O-Ring 3583832\u003c\/a\u003e – adjacent seal in the same cooling stack (replace together)\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/volvo-penta-thermostat-3583827\"\u003eVolvo Penta Thermostat 3583827\u003c\/a\u003e – thermostat commonly serviced in the same assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eTechnical FAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I reuse this O-ring if it looks undamaged?\u003c\/strong\u003e\u003cbr\u003e\nA: No. O-rings that have been compressed and heat-cycled in a marine cooling system lose their sealing ability even when they look intact. Always fit a new seal on reassembly.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Do I need all three O-rings (3583830, 3583831, 3583832) at once?\u003c\/strong\u003e\u003cbr\u003e\nA: If the cooling assembly is already apart, yes. Replacing the full set of adjacent seals in one visit avoids repeat disassembly if a neighboring seal fails shortly after.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How do I tell these O-rings apart?\u003c\/strong\u003e\u003cbr\u003e\nA: By their diagram position, not by size. Match each part number to the exact location shown in the Volvo Penta cooling-system schematic for your engine serial range.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\n\u003cp\u003eThis seal is one of the most common mix-up points in the D4\/D6 cooling stack — neighboring O-rings look nearly identical, and customers sometimes order the wrong one based on the removed part alone. The reliable fix is to match the part number to the diagram position rather than comparing by eye.\u003c\/p\u003e\n\u003cp\u003eIf a customer is only replacing one seal after a cooling leak, it's worth suggesting the full three-piece set: \u003ca href=\"\/products\/volvo-penta-thermostat-cooling-o-ring-3583830\"\u003e3583830\u003c\/a\u003e, 3583831, and \u003ca href=\"\/products\/volvo-penta-cooling-system-o-ring-3583832\"\u003e3583832\u003c\/a\u003e. All three are low-cost, and returning to the same assembly for a second seal failure is a frustrating and avoidable service call.\u003c\/p\u003e","brand":"VOL","offers":[{"title":"Default Title","offer_id":43564002476068,"sku":"3583831","price":19.2,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/1db2f2f7-d702-49e9-afd8-3eaff0059d07.png?v=1776459665","url":"https:\/\/marisolmarine.com\/products\/volvo-penta-o-ring-3583831","provider":"Marisol Marine Company","version":"1.0","type":"link"}