{"product_id":"volvo-432","title":"Volvo Penta D4 D6 Belt Tensioner 24542601","description":"\u003ch2\u003eVolvo Penta D4 D6 Belt Tensioner 24542601\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e 24542601\u003cbr\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Volvo Penta\u003cbr\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Automatic Spring-Loaded Belt Tensioner (OEM)\u003cbr\u003e\n\u003cstrong\u003eSystem:\u003c\/strong\u003e Accessory \/ Alternator Belt Drive\u003cbr\u003e\n\u003cstrong\u003eQuantity Required:\u003c\/strong\u003e 1 per applicable engine\u003cbr\u003e\n\u003cstrong\u003eApproximate Weight:\u003c\/strong\u003e 700 g\u003cbr\u003e\n\u003cstrong\u003eSupersedes:\u003c\/strong\u003e 21344508, 23272815, 24077907\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eWhat This Part Does\u003c\/h3\u003e\n\u003cp\u003eThe 24542601 is a genuine OEM automatic spring-loaded belt tensioner used across a wide range of Volvo Penta D4 and D6 marine diesel engines. It maintains correct tension on the front accessory \/ alternator belt as the belt wears and stretches in service, helping prevent belt slip, charging system issues, pulley wear, and premature belt failure. This is the current service consolidation for several earlier tensioner numbers across the D4\/D6 engine range.\u003c\/p\u003e\n\n\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\n\u003cp\u003eConfirm your exact engine model and serial number before ordering. Because 24542601 spans multiple D4 and D6 production generations, one application catalog specifies this tensioner for engines from serial number 2004029745 and later — verify the change point against the Volvo Penta parts diagram for your specific engine.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVolvo Penta D4-145I-G\u003c\/li\u003e\n\u003cli\u003eVolvo Penta D4-150A-G\u003c\/li\u003e\n\u003cli\u003eVolvo Penta D4-175I-G\u003c\/li\u003e\n\u003cli\u003eVolvo Penta D4-180I-B \/ C \/ D \/ E \/ F\u003c\/li\u003e\n\u003cli\u003eVolvo Penta D4-210A \/ D4-210I\u003c\/li\u003e\n\u003cli\u003eVolvo Penta D4-225A \/ D4-225I\u003c\/li\u003e\n\u003cli\u003eVolvo Penta D4-230A \/ D4-230I\u003c\/li\u003e\n\u003cli\u003eVolvo Penta D4-260A \/ D4-260D \/ D4-260I\u003c\/li\u003e\n\u003cli\u003eVolvo Penta D4-270A \/ D4-270I\u003c\/li\u003e\n\u003cli\u003eVolvo Penta D4-300A \/ D4-300D \/ D4-300I\u003c\/li\u003e\n\u003cli\u003eVolvo Penta D4-320A-G \/ D4-320I-G\u003c\/li\u003e\n\u003cli\u003eVolvo Penta D6-280 (selected configurations)\u003c\/li\u003e\n\u003cli\u003eVolvo Penta D6-300 \/ D6-310 \/ D6-330\u003c\/li\u003e\n\u003cli\u003eVolvo Penta D6-340 \/ D6-350 \/ D6-370\u003c\/li\u003e\n\u003cli\u003eVolvo Penta D6-380 \/ D6-400 \/ D6-435\u003c\/li\u003e\n\u003cli\u003eVolvo Penta D6-440 \/ D6-480\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eD6 fitment spans A, D, I, and waterjet configurations across multiple production generations. Confirm by engine serial number.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eSerial Number Notice\u003c\/h3\u003e\n\u003cp\u003eEarlier D4 and D6 engines used predecessor tensioner numbers (21344508, 23272815, 24077907) before Volvo Penta consolidated service into 24542601. The exact changeover point varies by engine serial range. Always verify using the engine-specific Volvo Penta parts diagram before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eWhen to Replace\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBelt tension is weak or inconsistent\u003c\/li\u003e\n\u003cli\u003eTensioner pulley bearing is noisy, rough, or intermittent\u003c\/li\u003e\n\u003cli\u003eTensioner arm binds or does not move smoothly through its travel range\u003c\/li\u003e\n\u003cli\u003ePulley runs out of alignment with the belt\u003c\/li\u003e\n\u003cli\u003eBelt repeatedly slips despite being in serviceable condition\u003c\/li\u003e\n\u003cli\u003eSpring mechanism loses tension\u003c\/li\u003e\n\u003cli\u003eExcessive pulley or pivot play detected on inspection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInspect the drive belt and all accessory pulleys before installing the replacement tensioner\u003c\/li\u003e\n\u003cli\u003eCheck for pulley misalignment, bearing roughness, glazing, cracking, or oil contamination on the belt\u003c\/li\u003e\n\u003cli\u003eUse the Volvo Penta D4\/D6 workshop procedure when releasing and reloading spring tension — do not force or pry the tensioner beyond its designed travel\u003c\/li\u003e\n\u003cli\u003eReplace the belt at the same time if worn or glazed — a new tensioner on a degraded belt will not restore correct performance\u003c\/li\u003e\n\u003cli\u003eVerify belt alignment and tensioner seating after installation before starting the engine\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePart Number Cross-Reference\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent OEM:\u003c\/strong\u003e 24542601\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupersedes (direct):\u003c\/strong\u003e 21344508, 23272815, 24077907\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdditional earlier references (same family):\u003c\/strong\u003e 22774756, 22667563, 3583665, 3582694\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupersession:\u003c\/strong\u003e 21344508 \/ 23272815 \/ 24077907 → 24542601\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e22774756, 22667563, 3583665, and 3582694 are associated with the same D4\/D6 tensioner replacement family. Confirm by engine serial before ordering.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eTechnical FAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: My parts manual shows 21344508 or 23272815 — is 24542601 the right replacement?\u003c\/strong\u003e\u003cbr\u003eA: Yes. 24542601 is the current Volvo Penta service part that replaces 21344508, 23272815, and 24077907. If your older catalog lists any of those numbers, 24542601 is the correct current replacement. Confirm availability with your dealer if in doubt.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does this tensioner fit both D4 and D6 engines?\u003c\/strong\u003e\u003cbr\u003eA: Yes, 24542601 covers a broad range of D4 and D6 marine diesel applications. However, because it spans multiple production generations with different serial break points, confirming by engine serial number and the Volvo Penta parts diagram for your specific model remains important.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I know if this is the accessory belt tensioner or the compressor belt tensioner?\u003c\/strong\u003e\u003cbr\u003eA: 24542601 is the \u003cstrong\u003eaccessory \/ alternator belt tensioner\u003c\/strong\u003e. The D4 and D6 engines use a separate tensioner for the compressor belt — \u003ca href=\"\/products\/8131483140132\"\u003eVolvo Penta Compressor Belt Tensioner 22171036\u003c\/a\u003e. Confirm which belt circuit is affected before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the service interval for the belt tensioner?\u003c\/strong\u003e\u003cbr\u003eA: Volvo Penta does not publish a fixed tensioner replacement interval independent of the belt service. Inspect the tensioner pulley bearing and spring mechanism at every belt replacement service and replace the tensioner whenever bearing roughness, binding, or loss of tension is detected. On high-hour D4\/D6 engines, proactive tensioner replacement at major service intervals is common practice.\u003c\/p\u003e\n\n\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBest use case:\u003c\/strong\u003e Order 24542601 when the alternator or accessory belt tensioner on a D4 or D6 shows bearing wear, loss of spring tension, or binding — or proactively during a major scheduled service on a high-hour engine. The broad D4\/D6 coverage makes this the standard current-service tensioner for most of the product line.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCommon issues:\u003c\/strong\u003e The most frequent mistake is ordering only the belt without replacing the tensioner when belt slip or slap has been the presenting symptom — a worn tensioner is often the root cause and the new belt will wear prematurely if the tensioner is left in place. Also confirm this is the accessory belt tensioner and not the compressor belt tensioner: the D4\/D6 uses separate tensioners for each belt circuit, and ordering the wrong one is a common error on twin-belt engines.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Parts\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/8131483140132\"\u003eVolvo Penta Compressor Belt Tensioner 22171036 — D4 D6\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/8131483598884\"\u003eVolvo Penta D3 V-Ribbed Accessory Belt 22283751\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VOL","offers":[{"title":"Default Title","offer_id":43563997265956,"sku":"24542601","price":432.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/9f526ca1-f1a9-4e8b-9302-36348cda5391.png?v=1788670884","url":"https:\/\/marisolmarine.com\/products\/volvo-432","provider":"Marisol Marine Company","version":"1.0","type":"link"}