{"product_id":"aluminum-coolant-overflow-expansion-tank-for-ford-excursion-2003-2005-6-0l","title":"Aluminum Coolant Overflow Expansion Tank for Ford Excursion (2003-2005) 6.0L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHeavy-Duty Aluminum Coolant Overflow Expansion Tank for 2003-2005 Ford Excursion (U137)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The aluminum coolant overflow expansion tank replaces the leak-prone factory plastic degas bottle on the 2003-2005 Ford Excursion to prevent catastrophic seam separation and coolant loss under high cooling system pressures.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Ford Excursion Plastic Degas Bottle Failure\u003c\/h3\u003e\n\u003cp\u003eThe factory molded nylon degas reservoir on the \u003cstrong\u003eU137\u003c\/strong\u003e chassis is notoriously vulnerable to heat fatigue when paired with the high-pressure cooling loop of the \u003cstrong\u003e6.0L Powerstroke V8 (VT365)\u003c\/strong\u003e. Extreme thermal cycling degrades the structural integrity of the OEM plastic over time, resulting in stress fractures, stripped neck threads, and seam separation along the ultrasonic weld lines. Under heavy towing loads and high boost pressures, pressure surges cause the stock container to balloon, crack, or vent coolant continuously from the cap.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eFabricated from heavy-gauge, corrosion-resistant sheet aluminum, this direct replacement degas tank is precision TIG welded and pressure tested to eliminate plastic rupture points entirely. The rigid aluminum construction withstands aggressive thermal spikes without warping or degrading under engine bay UV exposure. Designed with factory-aligned hose barbs and precision mounting brackets, it drops straight into the stock location, pairing directly with \u003cstrong\u003eOEM part numbers 3C3Z-8A080-AE\u003c\/strong\u003e and \u003cstrong\u003e6C3Z-8A080-B\u003c\/strong\u003e while maintaining a reliable, leak-free seal under severe operating conditions.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2003-2005 Ford Excursion\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e6.0L Powerstroke V8 (VT365) \/ U137\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e325 hp \/ 560 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e3C3Z-8A080-AE, 6C3Z-8A080-B, 603-217\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2003-2005 Ford Excursion Eddie Bauer 6.0L Powerstroke V8 Diesel\u003c\/li\u003e\n  \u003cli\u003e2003-2005 Ford Excursion Limited 6.0L Powerstroke V8 Diesel\u003c\/li\u003e\n  \u003cli\u003e2004-2005 Ford Excursion XLS 6.0L Powerstroke V8 Diesel\u003c\/li\u003e\n  \u003cli\u003e2003-2005 Ford Excursion XLT 6.0L Powerstroke V8 Diesel\u003c\/li\u003e\n  \u003cli\u003eNote: Fits 6.0L Powerstroke diesel applications only. Does not fit 7.3L diesel or gas models.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the U137 Excursion?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2003-2005 Ford Excursion equipped with the 6.0L Powerstroke V8 (VT365) engine.\u003c\/p\u003e\n\n\u003ch4\u003eAre modifications or custom hoses required for installation?\u003c\/h4\u003e\n\u003cp\u003eNo, this unit is engineered for direct bolt-on installation utilizing the factory mounting holes and standard cooling hoses.\u003c\/p\u003e\n\n\u003ch3\u003eThe Ford Heavy-Duty Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt for severe-duty hauling and high-load towing, this all-aluminum expansion tank provides the critical thermal durability required to keep your diesel running reliably across heavy hauls and remote routes.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67524673536248,"sku":"DS-EX4L9NRC4","price":104.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/aluminum-coolant-overflow-expansion-tank-for-ford-excursion-2003-2005-6-0l-1.webp?v=1790462768","url":"https:\/\/performancechiptuning.com\/products\/aluminum-coolant-overflow-expansion-tank-for-ford-excursion-2003-2005-6-0l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}