{"id":2455,"date":"2026-03-26T10:35:15","date_gmt":"2026-03-26T10:35:15","guid":{"rendered":"https:\/\/yzdlparts.com\/?p=2455"},"modified":"2026-03-27T07:52:30","modified_gmt":"2026-03-27T07:52:30","slug":"cummins-isx15-water-pump-comparison","status":"publish","type":"post","link":"https:\/\/yzdlparts.com\/ru\/cummins-isx15-water-pump-comparison\/","title":{"rendered":"\u0421\u0440\u0430\u0432\u043d\u0435\u043d\u0438\u0435 \u0432\u043e\u0434\u044f\u043d\u044b\u0445 \u043d\u0430\u0441\u043e\u0441\u043e\u0432 Cummins ISX15: \u0420\u0430\u0437\u043b\u0438\u0447\u0438\u044f 3684449, 4089908, 4089909, 4089911"},"content":{"rendered":"<h3 class=\"wp-block-heading\">Introduction<\/h3>\n\n\n\n<p>When it comes to the <a href=\"https:\/\/www.slideshare.net\/slideshow\/cummins-isx15-water-pump-selection-identification-guide-3684449-4089908-4089909-4089911\/286707730\" title=\"\">Cummins ISX15<\/a> engine, choosing the right water pump is critical for cooling efficiency and engine longevity. However, with multiple part numbers like <a href=\"http:\/\/cummins.com\" title=\"\">CUMMINS<\/a> ISX15 water pump <strong>3684449, 4089908, 4089909, and 4089911<\/strong>, it\u2019s easy to get confused. In this guide, we break down the key technical differences\u2014from volute housing designs to pulley sizes\u2014to help you identify the exact part you need.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">1. Cummins 3684449: The Most Distinct Design<\/h3>\n\n\n\n<p><a href=\"https:\/\/yzdlparts.com\/ru\/cummins-x15-engine-parts\/\" title=\"\">Cummins ISX15<\/a> water pump <strong>3684449<\/strong> is the easiest to identify among the four. Its <strong>Water Pump Volute Housing<\/strong> is completely different from the other three models. It is designed for specific ISX15 configurations, and its unique housing shape means it cannot be interchanged with the 4089908 or 4089909 series. If your housing looks significantly different, 3684449 is likely your match.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/3684449-X15-R-768x1024.webp\" alt=\"Cummins ISX15 Water Pump 3684449 with unique Volute Housing design\" class=\"wp-image-2456\" srcset=\"https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/3684449-X15-R-768x1024.webp 768w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/3684449-X15-R-225x300.webp 225w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/3684449-X15-R-1152x1536.webp 1152w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/3684449-X15-R-9x12.webp 9w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/3684449-X15-R.webp 1279w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">2. <a href=\"https:\/\/yzdlparts.com\/ru\/cummins-x15-engine-parts\/\" title=\"Cummins ISX15\">Cummins ISX15<\/a> water pump 4089908 vs. 4089909: Integrated vs. Split Housing<\/h3>\n\n\n\n<p>These two are often mistaken for each other, but the difference lies in the housing structure:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>4089908:<\/strong> Features a <strong>one-piece (integrated) Water Pump Volute Housing<\/strong>. It is a solid, continuous casting.<\/li>\n\n\n\n<li><strong>4089909:<\/strong> Features a <strong>two-piece (split-type) Water Pump Volute Housing<\/strong>.<\/li>\n\n\n\n<li><strong>Note:<\/strong> In addition to the housing, the <strong>pulleys<\/strong> on these two models are also different. Always check the pulley profile before installation.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/4089908-R-768x1024.webp\" alt=\"Cummins ISX15 Water Pump 4089908 with one-piece integrated Volute Housing\" class=\"wp-image-2457\" srcset=\"https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/4089908-R-768x1024.webp 768w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/4089908-R-225x300.webp 225w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/4089908-R-1152x1536.webp 1152w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/4089908-R-9x12.webp 9w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/4089908-R.webp 1279w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"576\" height=\"1024\" src=\"https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/5473363-X15-R-576x1024.webp\" alt=\"Cummins ISX15 Water Pump 4089909 with two-piece split-type Volute Housing\" class=\"wp-image-2460\" srcset=\"https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/5473363-X15-R-576x1024.webp 576w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/5473363-X15-R-169x300.webp 169w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/5473363-X15-R-768x1366.webp 768w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/5473363-X15-R-864x1536.webp 864w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/5473363-X15-R-1151x2048.webp 1151w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/5473363-X15-R-7x12.webp 7w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/5473363-X15-R.webp 1279w\" sizes=\"(max-width: 576px) 100vw, 576px\" \/><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">3. <a href=\"https:\/\/yzdlparts.com\/ru\/cummins-x15-engine-parts\/\" title=\"\">Cummins ISX15<\/a> water pump 4089911 vs. 4089909: The Pulley Size Trap<\/h3>\n\n\n\n<p>At first glance, Cummins ISX15 water pump <strong>4089911<\/strong> \u0438 <strong>4089909<\/strong> look almost identical. Many technicians realize the difference only when the belt doesn&#8217;t fit correctly.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Key Identification:<\/strong> \u0421\u0430\u0439\u0442 <strong>pulley on the 4089911 is larger<\/strong> than the pulley on the 4089909.<\/li>\n\n\n\n<li><strong>Technical Tip:<\/strong> Always measure the pulley diameter or compare them side-by-side. A larger pulley affects the pump&#8217;s RPM and belt tension.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"874\" height=\"1024\" src=\"https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/4089911-R-1-874x1024.webp\" alt=\"Cummins ISX15 Water Pump 4089911 with larger diameter pulley comparison\" class=\"wp-image-2459\" srcset=\"https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/4089911-R-1-874x1024.webp 874w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/4089911-R-1-256x300.webp 256w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/4089911-R-1-768x900.webp 768w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/4089911-R-1-10x12.webp 10w, https:\/\/yzdlparts.com\/wp-content\/uploads\/2026\/03\/4089911-R-1.webp 1092w\" sizes=\"(max-width: 874px) 100vw, 874px\" \/><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Comparison Summary Table<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>\u041d\u043e\u043c\u0435\u0440 \u0434\u0435\u0442\u0430\u043b\u0438<\/strong><\/td><td><strong>Volute Housing Type<\/strong><\/td><td><strong>Pulley Feature<\/strong><\/td><td><strong>Identification Tip<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong>3684449<\/strong><\/td><td>Unique Design<\/td><td>Specific Pattern<\/td><td>Completely different housing shape<\/td><\/tr><tr><td><strong>4089908<\/strong><\/td><td><strong>One-piece (Integrated)<\/strong><\/td><td>Standard<\/td><td>Solid casting, no split lines<\/td><\/tr><tr><td><strong>4089909<\/strong><\/td><td><strong>Two-piece (Split)<\/strong><\/td><td>Standard<\/td><td>Look for the housing seam\/split<\/td><\/tr><tr><td><strong>4089911<\/strong><\/td><td>Two-piece (Split)<\/td><td><strong>Large Diameter<\/strong><\/td><td>Pulley is larger than 4089909<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Why Accurate Identification Matters<\/h3>\n\n\n\n<p>Installing the wrong water pump on a Cummins ISX15 can lead to improper belt tension, coolant flow issues, or even catastrophic engine overheating. Whether you are dealing with a SOHC or DOHC setup, verifying the housing type and pulley size is the only way to ensure a perfect fit.<\/p>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Introduction When it comes to the Cummins ISX15 engine, choosing the right water pump is critical for cooling efficiency and engine longevity. However, with multiple part numbers like CUMMINS ISX15 water pump 3684449, 4089908, 4089909, and 4089911, it\u2019s easy to get confused. In this guide, we break down the key technical differences\u2014from volute housing designs [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2457,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[27],"tags":[33,36,34,35],"class_list":["post-2455","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-maintenance-guide","tag-33","tag-36","tag-34","tag-35"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/yzdlparts.com\/ru\/wp-json\/wp\/v2\/posts\/2455","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yzdlparts.com\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yzdlparts.com\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yzdlparts.com\/ru\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yzdlparts.com\/ru\/wp-json\/wp\/v2\/comments?post=2455"}],"version-history":[{"count":2,"href":"https:\/\/yzdlparts.com\/ru\/wp-json\/wp\/v2\/posts\/2455\/revisions"}],"predecessor-version":[{"id":2470,"href":"https:\/\/yzdlparts.com\/ru\/wp-json\/wp\/v2\/posts\/2455\/revisions\/2470"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/yzdlparts.com\/ru\/wp-json\/wp\/v2\/media\/2457"}],"wp:attachment":[{"href":"https:\/\/yzdlparts.com\/ru\/wp-json\/wp\/v2\/media?parent=2455"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yzdlparts.com\/ru\/wp-json\/wp\/v2\/categories?post=2455"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yzdlparts.com\/ru\/wp-json\/wp\/v2\/tags?post=2455"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}