{"product_id":"volvo-1634","title":"Volvo Penta Coolant Pump 3803516 - Special Order","description":"\u003cp\u003eThe \u003cstrong\u003eVolvo Penta Coolant Pump 3803516\u003c\/strong\u003e is a freshwater \/ engine coolant circulation pump used on select Volvo Penta industrial diesel engine applications. This pump circulates coolant through the engine block, cylinder head, oil cooler, thermostat circuit, and heat exchanger or radiator circuit to help maintain correct operating temperature. Current Volvo Penta parts references show \u003cstrong\u003e3803516\u003c\/strong\u003e replaced by \u003cstrong\u003e3801578\u003c\/strong\u003e, with \u003cstrong\u003e3801578\u003c\/strong\u003e listed as a \u003cstrong\u003ecoolant pump reman \/ exchange\u003c\/strong\u003e part requiring a core return.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eVolvo Penta coolant circulation pump\u003c\/li\u003e\n\u003cli\u003eOriginal part number: \u003cstrong\u003e3803516\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eReplacement \/ exchange part number: \u003cstrong\u003e3801578\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eRelated Volvo reference: \u003cstrong\u003e21727936\u003c\/strong\u003e, also shown as replaced by \u003cstrong\u003e3801578\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eUsed in the closed coolant side of the engine cooling system\u003c\/li\u003e\n\u003cli\u003eFactory exchange \/ reman style part; core deposit may apply\u003c\/li\u003e\n\u003cli\u003eAssociated with Volvo Penta TAD \/ TD 5-litre and 7-litre industrial engine families\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eEngine Compatibility\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eConfirmed application references for the replacement pump \u003cstrong\u003e3801578\u003c\/strong\u003e include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eTAD520GE\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTAD520VE\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTAD530GE EDC4 \/ MECH\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTAD531GE EDC4 \/ MECH\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTAD532GE EDC4\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTAD550GE\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTAD551GE\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTAD720GE\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTAD720VE\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTAD721GE\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTAD721VE\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTAD722GE\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTAD722VE\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTAD730GE EDC4 \/ MECH\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTAD731GE EDC4 \/ MECH\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTAD750GE\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTAD750VE\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTAD751GE\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTAD760VE\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTD520GE\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTD520VE\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTD720GE\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTD720VE PP\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAdditional aftermarket cross-reference data also associates \u003cstrong\u003e3801578 \/ 21727936\u003c\/strong\u003e with D5A and D7A variants, but final fitment should be confirmed by Volvo Penta serial number and the cooling-system diagram before ordering.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eSerial Number Fitment Notice\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eConfirm fitment using the engine model, serial number, existing pump number, and Volvo Penta cooling-system diagram. This part number has been superseded, so the current ordering path may be \u003cstrong\u003e3803516 → 3801578\u003c\/strong\u003e, with core-return handling for the exchange pump. Do not match the pump by appearance alone; mounting pattern, pulley\/drive arrangement, gasket face, and engine version must match.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eWhen This Part Needs Replacement\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eReplace the coolant pump if there is coolant leakage at the pump body or weep area, bearing noise, shaft play, overheating, poor coolant circulation, damaged impeller, corrosion, or repeated coolant loss traced to the pump. A failing coolant pump can cause rising engine temperature even when the thermostat, coolant level, and heat exchanger or radiator are otherwise serviceable.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eInstallation Notes\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eInspect the gasket surface, pulley or drive components, belt condition where applicable, coolant hoses, thermostat housing, coolant filter, and surrounding pipework during replacement. Use the correct coolant mixture and bleed the cooling system fully after installation. Volvo Penta cooling-system documentation identifies the coolant pump as the component that circulates coolant through the engine block, cylinder heads, liner jackets, oil cooler, and thermostat circuit.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eAlternate\/Superseded Part Numbers\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVolvo Penta 3803516\u003c\/strong\u003e — original coolant pump reference\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVolvo Penta 3801578\u003c\/strong\u003e — replacement \/ exchange coolant pump reference\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVolvo Penta 21727936\u003c\/strong\u003e — related Volvo reference superseded to \u003cstrong\u003e3801578\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVolvo \/ Deutz cross-reference references:\u003c\/strong\u003e \u003cstrong\u003e20726077\u003c\/strong\u003e, \u003cstrong\u003e20405685\u003c\/strong\u003e, \u003cstrong\u003e4256959\u003c\/strong\u003e, \u003cstrong\u003e4256959R\u003c\/strong\u003e, \u003cstrong\u003e423173\u003c\/strong\u003e — verify before use, as these appear mainly in aftermarket interchange data.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eParts Desk Insight\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe clean ordering path is \u003cstrong\u003e3803516 → 3801578\u003c\/strong\u003e, but the fitment still needs to be checked against the engine serial and diagram. This pump appears across several Volvo Penta 5-litre and 7-litre industrial engine families, so the right match is the current pump number plus the exact engine build, not just the TAD or TD family name.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecial Order\u003c\/strong\u003e — this product is not currently in store inventory but may be available from the Manufacturer. Special Orders may take up to 2 weeks to arrive. Call the parts desk before ordering if you need a closer estimate on delivery time.\u003c\/p\u003e","brand":"VOL","offers":[{"title":"Default Title","offer_id":44081137713188,"sku":"3803516","price":1597.46,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/cedbf11e-daa2-4d26-a72b-4de083dc7307.png?v=1778612185","url":"https:\/\/marisolmarine.com\/products\/volvo-1634","provider":"Marisol Marine Company","version":"1.0","type":"link"}