{"product_id":"performance-radiator-for-lincoln-navigator-2005-2006-5-4l","title":"Performance Radiator for Lincoln Navigator (2005-2006) 5.4L","description":"\u003ch2\u003eHigh-Capacity Performance Radiator for 2005-2006 Lincoln Navigator\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e Upgrades the restrictive factory cooling system with a high-capacity, all-aluminum core designed to lower engine operating temperatures during heavy towing and high-load conditions.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Navigator Thermal Weakness\u003c\/h3\u003e\n\u003cp\u003eThe factory radiator equipped on the UN173 chassis with the 5.4L Triton V8 relies on crimped plastic end tanks bonded to an undersized aluminum core. Over time and under repeated thermal cycling, these plastic tanks become brittle, leading to micro-fractures, coolant leaks, and catastrophic system pressure loss. Furthermore, the OEM core lacks the volumetric capacity required for efficient thermal dissipation when hauling heavy loads or navigating steep grades, resulting in heat soak, elevated Engine Coolant Temperature (ECT), and premature wear on engine internals.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis performance replacement eliminates weak plastic components in favor of 100% TIG-welded, full aluminum construction without the use of epoxy. The core is vacuum brazed and engineered to a high-density racing specification, utilizing a 1-row tube design with a massive footprint of 31.96\" W x 16.85\" H. Thermal transfer is maximized by increasing fin density to 14-16 fins per inch and tightening cooling row spacing to 3\/8\", cramming approximately 1,500 more fins into the core than standard aftermarket units. This geometry significantly expands the surface area, yielding a 35% to 45% increase in cooling efficiency and providing a higher coolant capacity to stabilize temperatures under heavy mechanical strain.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px;\"\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e2005-2006 Lincoln Navigator\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eEngine \/ Chassis\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e5.4L 3V Triton V8 \/ UN173\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eStock Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e300 hp \/ 365 lb-ft (Approx)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eCore Dimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e31.96\" W x 16.85\" H\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eInlet \/ Outlet Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e1.50\" \/ 1.75\"\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eCU2818, CU2819, 5L3Z8005AB, FO3010269\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2005 Lincoln Navigator 5.4L V8\u003c\/li\u003e\n  \u003cli\u003e2006 Lincoln Navigator 5.4L V8\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe Lincoln Durability Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt for rigorous duty cycles, this all-aluminum radiator ensures your luxury SUV's cooling system can handle sustained towing and high-payload demands without compromising engine reliability or performance.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50123796545784,"sku":"DS-EBZQ2IG90","price":249.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/performance-radiator-for-ford-expedition-2003-2006-1_aa59493b-ae1e-4942-a786-58b2902f1c1c.webp?v=1786056907","url":"https:\/\/performancechiptuning.com\/es\/products\/performance-radiator-for-lincoln-navigator-2005-2006-5-4l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}