{"product_id":"3058793r-genuine-cummins®-onan-manifold-exhaust","title":"3058793R | Genuine Cummins® Onan MANIFOLD, EXHAUST","description":"\u003cp\u003e\u003cstrong\u003eDescription\u003c\/strong\u003e: Onan MANIFOLD, EXHAUST\u003cbr\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e: New\u003cbr\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e: 3058793R\u003cbr\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e: Cummins\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVehicle Fitment\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \n\u003cp data-path-to-node=\"3\"\u003e\u003cb data-path-to-node=\"3\" data-index-in-node=\"0\"\u003e1. Compatible Engine and Generator Families\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"4\"\u003eThe \"R\" suffix in this part number indicates a factory-remanufactured or a specialized revised version of a classic Cummins Onan component. This manifold is engineered for heavy-duty commercial and stationary \u003cb data-path-to-node=\"4\" data-index-in-node=\"209\"\u003eCummins Onan Diesel and Gas Generator Sets\u003c\/b\u003e, primarily fitting:\u003c\/p\u003e\n\u003cul data-path-to-node=\"5\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,0,0\"\u003e\u003cb data-path-to-node=\"5,0,0\" data-index-in-node=\"0\"\u003eOnan DL4 \/ DL6 Series:\u003c\/b\u003e Heavy industrial utility power plants.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,1,0\"\u003e\u003cb data-path-to-node=\"5,1,0\" data-index-in-node=\"0\"\u003eOnan DJ Series (DJB, DJC, DJE):\u003c\/b\u003e Vintage, bulletproof multi-cylinder diesel generator platforms.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,2,0\"\u003e\u003cb data-path-to-node=\"5,2,0\" data-index-in-node=\"0\"\u003eOnan Commercial QD (Quiet Diesel) \u0026amp; Quiet Gas platforms:\u003c\/b\u003e High-capacity units engineered for heavy-vehicle integration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"6\"\u003e\u003cb data-path-to-node=\"6\" data-index-in-node=\"0\"\u003e2. Common Vehicle Types \u0026amp; Applications\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"7\"\u003eBecause this exhaust manifold is built to handle the rigorous duty cycles of enclosed mobile compartments, it is widely utilized across the following platforms:\u003c\/p\u003e\n\u003cul data-path-to-node=\"8\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,0,0\"\u003e\u003cb data-path-to-node=\"8,0,0\" data-index-in-node=\"0\"\u003eLarge Class A Motorhomes \u0026amp; Luxury Diesel Pushers:\u003c\/b\u003e Custom recreational vehicles equipped with high-output onboard Onan generators to run multiple roof air conditioners.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,1,0\"\u003e\u003cb data-path-to-node=\"8,1,0\" data-index-in-node=\"0\"\u003eSpecialty Commercial Work Trucks:\u003c\/b\u003e Command centers, mobile broadcast vans, utility service trucks, and mobile medical clinics requiring reliable standalone electrical grids.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,2,0\"\u003e\u003cb data-path-to-node=\"8,2,0\" data-index-in-node=\"0\"\u003eIndustrial Auxiliary Power Units (APUs):\u003c\/b\u003e Heavy commercial trucks, emergency response vehicles, and railway utility equipment utilizing standalone diesel power packs.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp data-path-to-node=\"0\"\u003eThe Onan EXHAUST MANIFOLD is an original equipment manufacturer (OEM) heavy-duty cast metal component designed to collect and channel exhaust gases away from the engine cylinders.\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \n\u003cp data-path-to-node=\"4\"\u003e\u003cb data-path-to-node=\"4\" data-index-in-node=\"0\"\u003e1. What is it?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"5\"\u003eThis is a thick, heat-resistant iron casting that bolts directly onto the engine cylinder head. It acts as the initial collection point for the burning-hot spent fuel gases as they exit the exhaust valves, funneling them safely down into a single pipe connected to the generator's muffler and tailpipe system.\u003c\/p\u003e\n\u003cp data-path-to-node=\"6\"\u003e\u003cb data-path-to-node=\"6\" data-index-in-node=\"0\"\u003e2. Core Functions\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"7\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,0,0\"\u003e\u003cb data-path-to-node=\"7,0,0\" data-index-in-node=\"0\"\u003eExhaust Gas Scavenging:\u003c\/b\u003e It provides a smooth, unobstructed path for high-velocity exhaust gases to exit the engine, maintaining the necessary backpressure required for efficient diesel combustion cycles.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,1,0\"\u003e\u003cb data-path-to-node=\"7,1,0\" data-index-in-node=\"0\"\u003eThermal Management:\u003c\/b\u003e Operating inside enclosed RV and commercial generator compartments can create dangerous heat buildup. This manifold is cast from high-grade iron engineered to absorb, contain, and radiate intense thermal energy without warping or fracturing.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,2,0\"\u003e\u003cb data-path-to-node=\"7,2,0\" data-index-in-node=\"0\"\u003eCabin Air Safety:\u003c\/b\u003e By creating a perfectly sealed connection using heavy-duty flange gaskets, it ensures deadly carbon monoxide gases cannot leak into the vehicle's interior chassis or cargo areas.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eSigns of Faulty\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \n\u003cp data-path-to-node=\"3\"\u003e\u003cb data-path-to-node=\"3\" data-index-in-node=\"0\"\u003e1. Loud Tapping, Ticking, or Hissing Noises\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"4\"\u003eWhen an exhaust manifold cracks or its gasket fails, pressurized exhaust gas escapes through the breach. This creates a distinct, loud tapping or ticking sound, especially when the engine is cold. The noise often mimics a valve train tick but will change in volume or pitch when the generator goes under a heavy electrical load.\u003c\/p\u003e\n\u003cp data-path-to-node=\"5\"\u003e\u003cb data-path-to-node=\"5\" data-index-in-node=\"0\"\u003e2. Strong Exhaust Odors (Diesel\/Gas) Near the Vehicle\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"6\"\u003eIf you smell raw exhaust fumes inside or around your RV, mobile clinic, or work truck while the generator is running, the manifold is likely leaking. Because these generators are integrated into vehicle bodies, a leaking manifold can allow deadly carbon monoxide (CO) to seep into the living or driving quarters.\u003c\/p\u003e\n\u003cp data-path-to-node=\"7\"\u003e\u003cb data-path-to-node=\"7\" data-index-in-node=\"0\"\u003e3. Visible Black Soot Around the Cylinder Head\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"8\"\u003eA physical inspection of the manifold will often reveal the exact location of the failure. Look for fine, powdery black carbon\/soot deposits blasted onto the engine block, surrounding wires, or near the mounting bolts. This soot is a definitive sign that gases are escaping past the sealing surface.\u003c\/p\u003e\n\u003cp data-path-to-node=\"9\"\u003e\u003cb data-path-to-node=\"9\" data-index-in-node=\"0\"\u003e4. Melted Wires, Hoses, or Plastic Components\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"10\"\u003eExhaust gas temperatures can easily exceed \u003cspan class=\"math-inline\" data-math=\"1,200^\\circ\\text{F}\" data-index-in-node=\"43\"\u003e1,200F\u003c\/span\u003e (\u003cspan class=\"math-inline\" data-math=\"650^\\circ\\text{C}\" data-index-in-node=\"64\"\u003e650C\u003c\/span\u003e). If the manifold has a severe crack or blowout, it acts like a miniature blowtorch, shooting superheated gas directly onto nearby wiring harnesses, fuel lines, or plastic shrouds, causing them to melt or catch fire.\u003c\/p\u003e\n\u003cp data-path-to-node=\"11\"\u003e\u003cb data-path-to-node=\"11\" data-index-in-node=\"0\"\u003e5. Loss of Generator Power or Black Smoke\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"12\"\u003eA cracked manifold alters the exhaust system's backpressure and can mess with the engine's scavenging efficiency. In turbo-charged configurations or modern systems with sensors, an exhaust leak before the piping can cause sluggish engine response, reduced power output under load, or excessive black smoke due to incomplete combustion.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer information\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eCummins®\u003c\/strong\u003e is a worldwide leader in the production of engines, agricultural components, and other power-generating devices for various industries, including medium and heavy duty trucks, light commercial vehicles, buses, agriculture, and construction. Founded in 1919, this company stays true to its mission of making people's lives better by continuously improving its product line-up and introducing new solutions for a more prosperous world. Its core values—integrity, diversity and inclusion, excellence, caring, and teamwork—are what make it a successful company today—a worldwide leader with a network of more than 600 company-owned and independent distributors and almost 6,000 dealers in approximately 190 countries.\u003cbr\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003cbr\u003eFirst Truck Parts offers a \u003cstrong\u003e365-days\u003c\/strong\u003e \u003cstrong\u003ewarranty\u003c\/strong\u003e for all types of parts and in any condition. The warranty applies only to buyers who have placed an order on our website.\u003c\/p\u003e","brand":"Cummins®","offers":[{"title":"Default Title","offer_id":48834683338996,"sku":"3058793R","price":1570.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0605\/1479\/5764\/files\/ftpcorobka_04ffb079-9025-48c6-aec4-a0975dbf8324.jpg?v=1783533040","url":"https:\/\/firsttruckparts.com\/en-ca\/products\/3058793r-genuine-cummins%c2%ae-onan-manifold-exhaust","provider":"First Truck Parts","version":"1.0","type":"link"}